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York Jong

Reduce Motor Noise - 0 views

www.kronosrobotics.com/...GAN142.shtml

5star anti-interference electronics motor noise

shared by York Jong on 27 May 07 - Cached
  • This is the 3 capacitor method.  I used this one in all my RC cars and many of the RC toys that I have taken apart use this method.
  • One of the easiest and most overlooked technique that can be done to lower motor noise is the twist your motor and motor power wires.  This in affect forces the magnetic fields to cancel each other out.
  • By placing a metal shield between your motors and radio can do wonders.  Also keep in mind that some metals shield better than others.   Carbon Steel shields several hundred times better than aluminum.  Dont use this shielding as a conductor or you may compound the problem.
  • ...1 more annotation...
  • Place your high current wires away from sensitive areas and antennas.  Don't run the wire parallel with wires that are used as signaling in your micro controller.  If you must its best to have them cross at 90 degrees.
  • York Jong on 27 May 07
     
    In the past when I built a Bot I would just slap it together and hope for the best. However when I started to use RC receivers to aid in the control of my bots the results left a lot to be desired.
York Jong

Ray's Solder-less Motor Mount Tutorial - 0 views

raysbeambots.solarbotics.net/MotorMount.htm

5star beam diy motor nonsolder photopopper phototrope photovore robot toturial trick

shared by York Jong on 28 May 07 - Cached
  • attach your Pager Motors to your Popper using two Fuse Clips, two Small Paper Clips, and no solder
  • ...7 more annotations...
  • Set one straightened paper clip aside, you will use it at the end. Bend the two tips of one of the two paper clips as shown.
  • Put it in through the fuse clip like this, but make sure the notch in the fuse clip is facing out. (The clip has one edge bent inwards. This is the part that has to face outwards). Study this next picture closely.
  • From the position above, bend the paper clip up and then around the lead of the fuse clip as in the next picture.
  • Bend the paper clip under the fuse clip...
  • then up and over the fuse clip:
  • then around its other lead and you're almost done with the first fuse clip.
  • First clip -- wire is on the RIGHT side of the fuse clip leads... Second Clip -- wire is on the LEFT side of the fuse clip leads... But remember to make sure the notch in the fuse clip is facing out. (The clip has one edge bent inwards. This is the part that has to face outwards).  Follow all the steps above with the second clip and you get this:
  • York Jong on 28 May 07
     
    I'll show you how to attach your Pager Motors to your Popper using two Fuse Clips, two Small Paper Clips, and no solder.
York Jong

How to make Tactile Sensors! - 0 views

www.beam-online.com/...tactile.html

4star beam feeler robot sensor

shared by York Jong on 27 May 07 - Cached
  • York Jong on 27 May 07
     
    What you need.... * "2 paper clip * 'Click type' pen * Sheet of paper * Thin piano wire * Soldering iron * Solder * Wire clippers * Tape
York Jong

Build this simple "electronic electroscope," a FET electrometer - 0 views

www.amasci.com/...chargdet.html

circuit electrometer electronics electrostatics fet mpf102

shared by York Jong on 30 May 07 - Cached
  • This simple circuit can detect the invisible fields of voltage which surround all electrified objects
  • ...9 more annotations...
  • The Gate acts as an antenna, so leave it unconnected.
  • The 1-meg resistor helps protect the FET from being harmed by any accidental sparks to its Gate lead. The circuit will work fine without this resistor. Just don't intentionally "zap" the Gate wire with a charged object or your charged finger.
  • To test the circuit, charge up a pen or a comb on your hair, then wave it close to the little "antenna" wire. The LED should go dark. When you remove the electrified pen or comb, the LED should light up again.
  • If you suspect that humidity is very high, test this by rubbing a balloon or a plastic object upon your arm. If the balloon does not attract your arm hairs, humidity is too high.
  • This FET sensor is not an ideal educational device because it responds differently to positive than to negative.
  • negative objects turn the LED off, it lights again when removed. positive objects make the LED bright, then dark when removed.
  • Obtain a small capacitor with a value below 100 picofarads. Connect it between the FET gate lead and one of the other FET leads (doesn't matter which one.) This greatly reduces the sensitivity of the device
  • Now make the circuit MORE sensitive. Obtain an alligator clip-lead, and connect it to the Gate lead of the FET. Let it hang loose without touching anything. You'll find that this has vastly increased the sensitivity of your FET circuit.
  • York Jong on 30 May 07
     
    This simple circuit can detect the invisible fields of voltage which surround all electrified objects. It acts as an electronic "electroscope.
York Jong

Solar Cells - BEAM Wiki - 0 views

www.beam-wiki.org/...index.php

beam electronics solar

shared by York Jong on 26 May 07 - Cached
  • Most BEAMbot designs require at least 3 volts from their solar cell(s). This means, of course, that if you buy 0.5 V cells, you need to wire together at least six of them to do the job. This may or may not be something you want to mess with; it may or may not fit with the aesthetic design you're shooting for.
York Jong

Building Sensors and Motors for the Red and Blue Dot Crickets - 0 views

llk.media.mit.edu/...index.html

diy electronics mit solder wiring

shared by York Jong on 31 May 07 - Cached
  • York Jong on 31 May 07
     
    This document explains how to interface a variety of devices to the Red Dot Cricket:
York Jong

Building Sensors and Motors for Handy Board - 0 views

www.handyboard.com/sensors

diy electronics hardware mit robot sensor solder wiring

shared by York Jong on 31 May 07 - Cached
  • York Jong on 31 May 07
     
    This document explains how to interface a variety of devices to the Handy Board:
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