author7
310Instructables32,420,471Views3,745CommentsBrooklynJoined March 7th, 2006
My name is Randy and I am a Community Manager in these here parts. In a previous life I had founded and run the Instructables Design Studio (RIP) @ Autodesk's Pier 9 Technology Center. I'm also the author of the books 'Simple Bots,' and '62 Projects to Make with a Dead Computer'. I enjoy rideable robots, kaleidoscopes, microphotography, afternoon constitutionals, and baking. Subscribing to me=fun and excitement!

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  • randofo followedBrian Poor7 hours ago
      • Precious Poo: Silver-Plated Cat Kaka Jewelry
  • Raise Your Shower Head in 5 Minutes

    It's likely against your lease to be messing with the plumbing like this, but technically, yes, you can do this in any apartment. However, if you mess up you will end up both in violation of your lease and having to pay for damages. If probably better to ask your landlord really nicely, and have them do it for you. Or, at least, get permission from your landlord before you do it.

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  • randofo followedElisesEats2 days ago
      • Copycat: Marks & Spencer Strawbery Trifle
      • Butternut Pumpkin Bread Rolls (Squash)
      • Poke-pumpkins / Pokemon Rice Crispy Ball
  • randofo followedmetaterra5 days ago
      • Whisker Sensory Extension Wearable
      • Ultrasonic Sensory Extension Wearable
  • randofo commented onrandofo'sinstructable Program an ATtiny With Arduino6 days ago
    Program an ATtiny With Arduino

    I don't know.If it doesn't you should be able to download a legacy version of the software. This page has core files available for Arduino 1.5:https://code.google.com/archive/p/arduino-tiny/This page has core files for ATTiny 1.6.5 or later:https://github.com/SpenceKonde/ATTinyCore

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  • randofo commented onrandofo'sinstructable Arduino Motor Shield Tutorial7 days ago
    Arduino Motor Shield Tutorial

    Cool! Glad it worked out for you!

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  • randofo commented onrandofo'sinstructable Jar Lantern7 days ago
  • randofo commented onrandofo'sinstructable Discreet Pants Fly Checker9 days ago
    Discreet Pants Fly Checker

    That's an idea. I imagine that the mechanism needed to return the zipper to its original position would require a lot of force. I will think this one through! :)

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  • randofo commented onrandofo'sinstructable Resurrect a Polaroid Land Camera10 days ago
    Resurrect a Polaroid Land Camera

    Are you trying to shoot indoors or outdoors? What is the lighting situation like?

    I have never seen this before. I assume the dark blob in the back is what you are actually trying to shoot.My best guess is that you have a sensor metering problem with the camera circuitry (the darkness) or you have it set to black and white when it is color film. If it is a metering problem, try turning the lightness knob all the way up. Also, another thing to consider in terms of the darkness... are you holding down the shutter for long enough? You should hold the shutter down until you can hear it click shut on its own (or your images will be dark).My best guess in terms of the green blotch is that it is likely a light leak in the bellows or potentially elsewhere in the camera.Are you shooting with expired film? If the film is greatly expired or was stored improperly (or otherwise d...

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    I have never seen this before. I assume the dark blob in the back is what you are actually trying to shoot.My best guess is that you have a sensor metering problem with the camera circuitry (the darkness) or you have it set to black and white when it is color film. If it is a metering problem, try turning the lightness knob all the way up. Also, another thing to consider in terms of the darkness... are you holding down the shutter for long enough? You should hold the shutter down until you can hear it click shut on its own (or your images will be dark).My best guess in terms of the green blotch is that it is likely a light leak in the bellows or potentially elsewhere in the camera.Are you shooting with expired film? If the film is greatly expired or was stored improperly (or otherwise damaged), it might do strange things.You are not accidentally taking multiple exposures, right?

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  • randofo commented onrandofo'sinstructable Arduino-Controlled Robotic Drum13 days ago
    Arduino-Controlled Robotic Drum

    I don't remember, and I don't own the drum anymore. The current is not very high. Likely much less than 1 amp.If you did that, the drumstick would only travel in one direction, and the drumstick might have not enough recoil to bounce back on its own. You might be able to work something out with a DPDT pushbutton switch (to work as an H-bridge), but I don't know if that would be good for the motor because it would never turn off in the opposite (recoil) position.Alternately, you might be able to figure something out with a SPST pushbutton and a spring (for the recoil).

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  • randofo followeddonc14615 days ago
      • ISS Pointer Robo
      • Cutest Heartbeat Robot
      • Animated Psycho Picture
  • randofo commented onrandofo'sinstructable Phaser Guitar Pedal17 days ago
    Phaser Guitar Pedal

    Should be fine so long as the value are the same.

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  • randofo commented onrandofo'sinstructable Phaser Guitar Pedal17 days ago
    Phaser Guitar Pedal

    Honestly, I have never looked at the output wave. What you are describing sounds feasibly 'about right' (I think). The pot is basically mixing the two signals together into one signal. That wave is going to be some combination of the two.Being that it is sort of summing the two waves, I would think its probably correct that the amplitude increases.

    If you view the 'clean' signal at the same time as the phase shifted signal, they should be the same signal, but the phase shifted one should be moving in and out of phase (at the rate determined by the LFO).One potentiometer controls the LFOThe other potentiometer mixes the two signals together before being output to the amp.

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  • randofo followedmadaeon19 days ago
      • DIY Motorized Camera Slider
      • Laser Engraving an Egg for Easter
      • 3D Printed Speaker
  • randofo followedMimikry and ChrisN21920 days ago
      • Delicious Cured Egg Yolks
      • Instant Ice Cream for Winter Adventures
      • Caramel Snow Ice Cream With Chocolate Sauce
      • Rotating Lithophane Box
      • Lithophane Box With Remote
      • Coke Machine Can Level Detector
  • randofo followedbarclay5426 and dominik.mahnic21 days ago
      • Sculpted Oak Desk
      • Experimenting With Casting Techniques - Concrete Side Table
      • Arduino/App Controlled Desk Light
      • Laser Dia Projector
      • 100w MobileLED Diaprojector
  • randofo followedJohn deCaux and Jadem5221 days ago
      • How to Make Homemade Bacon
      • How to Cook Cast Iron Roasted Spiral Potatoes
      • How to Cook Breakfast in Bread (Egg Bread Bowl)
      • Beans to Curds - the Making of Tofu
      • Infused Tea Egg
      • Science of Kimchi
  • randofo commented onJadem52'sinstructable Beans to Curds - the Making of Tofu 22 days ago
    Beans to Curds - the Making of Tofu

    Very nice photos.

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  • randofo commented onKJMagnetics'sinstructable Magnet Sweeper22 days ago
    Magnet Sweeper

    Very nice. You should enter this into the Spotless Contest.

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      • Growing Tomatoes in Shiny Stuff (Jun 27, 2017 Update)
      • Leather Bracelet With Braided Insert
      • Burners From Scrap
      • Copper Pipe and Wood Wine Rack
      • DIY Tree Ring Shaped Wall Clock
      • DIY Concrete Tea Light Candle Holder
      • Laser Cut Algebra Balance - Teaching Tool
      • Ultralight Kayak - Middle School Project
      • Pure Gold Wedding Ring
  • randofo commented onrandofo'sinstructable Ring Modulator Pedal23 days ago
    Ring Modulator Pedal

    It should work with the bass, but I don't know what it will sound like. As for voice, you would want to match the mic level with a guitar input level. You don't want the mic signal coming in too high. That said, I don't know how well it would work. I'm sure it would make some sounds, but I am not sure any words would be understandable.

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  • randofo followedpoppy.oceanblue27 days ago
      • Personalised Dress Makers Dummy
      • How to Draw 3D Printable Chainmail With Fusion 360
      • 3D Body Scanner Using Raspberry Pi Cameras
  • randofo's instructable Indestructible Photo Album's weekly stats:27 days ago
    • Indestructible Photo Album
      7,386 views
      45 favorites
      22 comments
  • randofo commented onrandofo'sinstructable Indestructible Photo Album4 weeks ago
    Indestructible Photo Album

    I found mine with help of the internet. You can probably find yours in school though. It might be harder for you though because I think there are far fewer Jennifers these days than there were when I grew up. You couldn't walk more than 100 feet without bumping into one. Jennifers were everywhere.

    https://gifpop.io/

    Oh cool! I had not seen that before, but that's real nice. I like the use of the street signs.

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  • randofo followed60cyclehum4 weeks ago
      • The Don't-Leave-Home-Without-It Machine
      • A Dodecahedron Speaker for Desktop Printers
  • randofo commented onrandofo'sinstructable Indestructible Photo Album4 weeks ago
    Indestructible Photo Album

    There are holes drilled in the hinges. The bolts pass through the hinges and thread into U-channels and metal plates.The pages are kept in place with the binding posts.

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  • randofo commented onchienline'sinstructable How to Win Prizes at Instructables4 weeks ago
    How to Win Prizes at Instructables

    Hello!Thanks for the great overview.As the person who currently oversees contests on this site, I would just like to chime in for a moment about Step 4. Don't make what you think we want to see. Make what you are passionate about. What we like seeing is when people make things they really care about.But... if you want an inside tip, one thing that always grabs our attention is when a project is unique and there has not been 50 other similar projects posted to the site. Unfortunately, the four featured Instructable giveaway is no longer in effect. However, we are currently looking at new ways to reward authors. Stay tuned for that!Also, if I may ask, how many unpublished drafts do you have? It sounds like you might have quite the collection!

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  • randofo commented onrandofo'sinstructable Indestructible Photo Album4 weeks ago
  • Telepresence Robot: Basic Platform (Part 1)

    What grade level are you teaching at?

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  • Telepresence Robot: Basic Platform (Part 1)

    It's a problem on your end, but here is the code:/*Telepresence Robot - Drive Wheel Test CodeCode which tests the forward, backward, right and leftfunctionality of the telepresence robot base.*/// Include the servo library#include <Servo.h>// Tell the Arduino there are to continuous servosServo ContinuousServo1; Servo ContinuousServo2; void setup() {// Attach the continuous servos to pins 6 and 7ContinuousServo1.attach(6);ContinuousServo2.attach(7); // Start the continuous servos in a paused position// if they continue to spin slightly,// change these numbers until they stopContinuousServo1.write(94);ContinuousServo2.write(94);}void loop() {// Pick a random number between 0 and 3int range=random(4);// Switches routines based on the random number just selectedswitch (range) {//If...

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    It's a problem on your end, but here is the code:/*Telepresence Robot - Drive Wheel Test CodeCode which tests the forward, backward, right and leftfunctionality of the telepresence robot base.*/// Include the servo library#include <Servo.h>// Tell the Arduino there are to continuous servosServo ContinuousServo1; Servo ContinuousServo2; void setup() {// Attach the continuous servos to pins 6 and 7ContinuousServo1.attach(6);ContinuousServo2.attach(7); // Start the continuous servos in a paused position// if they continue to spin slightly,// change these numbers until they stopContinuousServo1.write(94);ContinuousServo2.write(94);}void loop() {// Pick a random number between 0 and 3int range=random(4);// Switches routines based on the random number just selectedswitch (range) {//If 0 is selected turn right and pause for a secondcase 0:right();delay(500);stopDriving();delay(1000);break;//If 1 is selected turn left and pause for a secondcase 1:left();delay(500);stopDriving();delay(1000);break;//If 2 is selected go forward and pause for a secondcase 2:forward();delay(500);stopDriving();delay(1000);break;//If 3 is selected go backward and pause for a secondcase 3:backward();delay(500);stopDriving();delay(1000);break;}// Pause for a millisecond for stability of the codedelay(1);}// Function to stop drivingvoid stopDriving() {ContinuousServo1.write(94);ContinuousServo2.write(94);}// Function to drive forwardsvoid forward(){ContinuousServo1.write(84);ContinuousServo2.write(104);}// Function to drive backwardsvoid backward(){ContinuousServo1.write(104);ContinuousServo2.write(84);}// Function to drive rightvoid right(){ContinuousServo1.write(104);ContinuousServo2.write(104);}// Function to drive leftvoid left(){ContinuousServo1.write(84);ContinuousServo2.write(84);}

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  • randofo commented onrandofo'sinstructable Resurrect a Polaroid Land Camera5 weeks ago
    Resurrect a Polaroid Land Camera

    I honestly don't know. I've never had to.This guide seems useful, albeit not land camera specific:http://instructables.com.mevn.net/id/Replace-the-light...For whatever it is worth, black electrical tape usually does an okay job on a temporary basis.

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  • randofo followeduersel5 weeks ago
      • Remote Controlled Clock on Speed - Now on Stage
      • From Streetlamp to Floorlamp
      • My Vintage Bike and Trailer
  • randofo commented onrandofo'sinstructable Moon Night Light5 weeks ago
    Moon Night Light

    In this circuit the LED brightness is controlled by the darkness in the room. The brightness is adjustable. Ultimately, the maximum brightness would depend on whatever LED strip you buy.

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  • randofo followeddiymontreal and JunieGenius5 weeks ago
      • Tapering Jig
      • Reclaimed Wood Storage Chest
      • Drill Press Table
      • Robotic Cloaking Device
      • Robotic Helmet That Stops You From Crying
  • randofo commented onseamster'sinstructable Make a Simple Welded Bar Stool5 weeks ago
    Make a Simple Welded Bar Stool

    Nice stool. Very sleek.

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  • randofo followedButterMyBiscuits and peachandlilac5 weeks ago
      • Layers of the Earth Breakfast
      • Oceanic Phone Case Made From Trash
      • Vintage Needlepoint Turned Into a Blanket Bag, Car Seat and Bleacher Warmer
      • Molecular Rosé Spheres With Raspberry Gel
  • randofo commented onButterMyBiscuits'sinstructable Layers of the Earth Breakfast5 weeks ago
    Layers of the Earth Breakfast

    I like the whole Earth cross-section idea. How did you arrive at that? This is cool.

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  • Molecular Rosé Spheres With Raspberry Gel

    I agree. This does look fancy. However, I like that is seemingly easy to make. If I ever have houseguests ever again, I suppose I might try this. :)

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  • randofo commented onrandofo'sinstructable Ring Modulator Pedal5 weeks ago
    Ring Modulator Pedal

    The LED doesn't light up. It's actually being used for its diode properties in the circuit.

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  • randofo commented onJjtrash04'sinstructable Rock Candy5 weeks ago
    Rock Candy

    Is your crystals still growing? I'd be interested to see a picture of the results.

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  • randofo's instructable Ring Modulator Pedal's weekly stats:5 weeks ago
    • Ring Modulator Pedal
      7,285 views
      77 favorites
      16 comments
  • Build a Skateboard From Scrap Acrylic

    Cool. I like the look of that! :)I bet if you were to try to swap the acrylic out for polycarbonate it would be much more durable.

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  • randofo made the instructable Ring Modulator Pedal6 weeks ago
  • randofo commented onrandofo'sinstructable Ring Modulator Pedal6 weeks ago
    Ring Modulator Pedal

    I don't know. I never tried. Right now the circuit is designed for a really small electrical signal coming in off of a guitar pickup. To send a human voice through the device you would need to reduce the volume a bit, and then I am not sure what it would sound like.

    No, the battery won't drain. The stereo jack is acting as a switch. Ground gets connected when the mono plug is inserted. Otherwise, the power is off.Yes, this has true bypass.

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  • randofo commented onrandofo'sinstructable Groundhog Day Alarm Clock6 weeks ago
    Groundhog Day Alarm Clock

    You can try Ebay. I sometimes see them on there, or people selling the service of modifying your existing clock.

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  • randofo followedWoodbrew, Tye Rannosaurus and papagun6 weeks ago
      • How to Make a Plywood Desk With Minimal Tools
      • DIY Giant Polaroid Picture Frame
      • DIY Modern Curved Plywood Lounger Chair
      • Banana (slug) Cream Pie
      • Monkey Brain Forbidden Fruits Edible Tide Pods
      • Brainwashed - Homemade Fizzing Bath Bomb
      • Dystopian Speakers and Practice Amp
  • randofo commented onTye Rannosaurus'sinstructable Banana (slug) Cream Pie6 weeks ago
    Banana (slug) Cream Pie

    I recently tried to convince my fiancé they were called banana slugs because they tasted like banana. As per usual, she did not believe me at all. Probably for the best, because I also just read an article the other day about an Australian teen who swallowed a slug on a dare and became paralyzed from the neck down. I guess you shouldn't eat real slugs.

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  • randofo commented onrandofo'sinstructable Atari Punk Console Synthesizer6 weeks ago
    Atari Punk Console Synthesizer

    Yeah. Instead of putting the speaker after the 10uF capacitor, you would want to build the line output circuit seen in the schematic here (the 10K, 4.7K resistors and 100K pot):http://www.flickriver.com/photos/22593138@N08/

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  • randofo commented onrandofo'sinstructable Ring Modulator Pedal6 weeks ago
    Ring Modulator Pedal

    Yes. It is intended to suppress the onboard oscillator.

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  • randofo commented onPenolopy Bulnick'sinstructable How to Dehydrate Marshmallows6 weeks ago
    How to Dehydrate Marshmallows

    Super cool. I wonder if you cut them first with a small cookie cutter, if you could shrink them down into little shaped marshmallows like in Lucky Charms.

    Or... On closer inspection, maybe I misunderstood the process a little. Either way, this is cool. :)

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  • randofo followedparttimeholiday7 weeks ago
      • Hygge Hotpants - Easy Lined Fur Shorts
  • randofo commented onrandofo'sinstructable Arduino-Controlled Robotic Drum7 weeks ago
    Arduino-Controlled Robotic Drum

    All of the drums essentially use the same electronic. In the instructions I say to buy 6 of everything. You only need 1 of everything. Basically, you will need an Arduino, motor shield, 1-2 motors, a 12V power supply, and a USB cable.I would just follow the instructions for the snare drum part of my Instructable (and ignore the other drums).The code will need to be rewritten to play particular songs.However, the way my sample code is written, it should currently work with just 1 drum track.Is the STEM expo a nation-wide event, or a local event?

    Did you bend the shield's V-in so that it is not plugged into the Arduino socket and apply 12V power separately to the shield?

    All of the drums essentially use the same electronic. In the instructions I say to buy 6 of everything. You only need 1 of everything. Basically, you will need an Arduino, motor shield, 1-2 motors, a 12V power supply, and a USB cable.I would just follow the instructions for the snare drum part of my Instructable (and ignore the other drums).The code will need to be rewritten to play particular songs.However, the way my sample code is written, it should currently work with just 1 drum track.Is the STEM expo a nation-wide event, or a local event?

    All of the drums essentially use the same electronics. In the instructions I say to buy 6 of everything. You only need 1 of everything. Basically, you will need an Arduino, motor shield, 1-2 motors, a 12V power supply, and a USB cable.I would just follow the instructions for the snare drum part of my Instructable (and ignore the other drums).The code will need to be rewritten to play particular songs.However, the way my sample code is written, it should currently work with just 1 drum track.Is the STEM expo a nation-wide event, or a local event?

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  • randofo followedJahnvi trivedi 7 weeks ago
      • Experimenting With Leather Sandles
      • Leather Diy Sunglasses Case
      • Traditional Kentucky Whiskey Pot
  • randofo commented onrandofo'sinstructable Simple Bots: Walker7 weeks ago
    Simple Bots: Walker

    Only if it is a geared motor. A standard DC motor does not have enough torque and spins too fast.

    Nice! Lookin' good.

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  • randofo commented onrandofo'sinstructable Arduino Motor Shield Tutorial7 weeks ago
    Arduino Motor Shield Tutorial

    In the code above they should both engage at the same time, but at different speeds. If one is taking a little while to engage, maybe it is being slightly underpowered? I am not certain what the error is without having more information about your setup.

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  • randofo commented onmickey.mcmanus'sinstructable Tinkercad-LegoHead8 weeks ago
    Tinkercad-LegoHead

    This is really funny. :)

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  • randofo followedmickey.mcmanus8 weeks ago
      • Tinkercad-LegoHead
      • Studebake-o-pod
  • randofo's instructable DSLR Microphotography's weekly stats:8 weeks ago
    • DSLR Microphotography
      11,038 views
      104 favorites
      16 comments
  • randofo's instructable Focus Stacking's weekly stats:8 weeks ago
    • Focus Stacking
      1,115 views
      24 favorites
      6 comments
  • randofo commented onrandofo'sinstructable Focus Stacking8 weeks ago
    Focus Stacking

    Updated. Thanks.

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  • randofo commented onrandofo'sinstructable DSLR Microphotography8 weeks ago
    DSLR Microphotography

    I'm not entirely sure what you are asking, but, if I am reading this correctly... then, yes, if you use an infinity focus lens, you would want to stack it on top of a normal focus lens set to infinity.

    Yes. That could work (so long as moving the stage doesn't disturb what you are shooting).

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  • randofo commented onrandofo'sinstructable DSLR Microphotography2 months ago
    DSLR Microphotography

    Yes. You would just need to find an appropriate bellows. This would likely need to be slightly longer than the 150mm bellows I used. You would also need a different set of adapter rings for the camera you are using. The general principle remains the same. The idea is to simply space the objective 160mm from the sensor. A mirrorless camera would work well because they have no mechanical vibration when shooting. In fact, I have used this microphotography lens before designed for a mirrorless canon:https://www.bhphotovideo.com/c/product/929753-REG/...

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  • randofo commented onrandofo'sinstructable DSLR Microphotography2 months ago
    DSLR Microphotography

    Thanks. I had fun making them.

    Mostly right. The sugar crystal is actually a diamond ring, and the ice is a blue geode. There are also various types of mold. Broccoli. Leaves. Seaweed. A pinpoint. An RFID chip. A circuit board. Another geode. Some gross toenails (with dried blood). A dust bunny. Hair. I think that about covers it.

    Thanks!

    Thank you.

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  • randofo commented onrandofo'sinstructable Focus Stacking2 months ago
    Focus Stacking

    Oh cool. 450X is fairly impressive. I should give that a try. There have been a few image sequences that this process has not worked well with. Do you have a picture of that?

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  • randofo commented onrandofo'sinstructable Making an Audio Mixer2 months ago
    Making an Audio Mixer

    You would want to build an active mixer and use an op amp for that design. Here is a really simple op amp based mixer I built a long time ago:http://instructables.com.mevn.net/id/Birth-of-Man-Mixi...You can likely find schematics closer to what you are looking for though if you do a Google image search for "audio mixer schematic."

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  • randofo followedJonny Builds2 months ago
      • How to Build an Easy Farmhouse Desk
      • DIY Mid-Century File Trays
      • How to Build an Awesome Reading Nook With Book Storage.
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