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York Jong

Furby Resurrection - 0 views

members.cox.net/...furby.html

calebchung furby pic robot toy

shared by York Jong on 24 Mar 08 - Cached
  • York Jong on 24 Mar 08
     
    There are several websites documenting the original Furby circuit board. I decided to replace the original circuit entirely and replace it with a PIC based controller.
York Jong

Furby Schematics - 0 views

mechatronics.mech.northwestern.edu/...Furby_schematics.html

5star calebchung circuit embedded furby robot schematics

shared by York Jong on 27 May 07 - Cached
  • Note that the resistor value of the pull-down resistor affects the voltage at pin 3 of the Furby's connector. We used a 1k ohm resistor to make it less sensitive to light (since we're now operating with it open to ambient light).
  • In the above diagram, a 20k ohm resistor is used as the pull-up resistor. You can, however, use any resistor as the pull-up resistor as long as the resistance is high enough to protect the circuit.
  • York Jong on 27 May 07
     
    There are a number of sensors and a motor driver on the Furby. The following is a list of these sensors and their functions.
York Jong

HackFurby.com - Furby Schematics - 0 views

www.hackfurby.com/schematic.html

3star calebchung circuit embedded furby robot schematics

shared by York Jong on 27 May 07 - Cached
  • York Jong on 27 May 07
     
    Through a lot of hard work by people other than myself, Furby's innner electronics have been fully reverse engineered. To the right is a rendering of the schematic created by Chris Brown. If you've got any corrections, I'm sure he'd be interested.
York Jong

Main Page - BEAM Wiki - 0 views

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

5star beam electronics robot

shared by York Jong on 26 May 07 - Cached
  • York Jong on 26 May 07
     
    The Wikipedia gives quite a good definition what BEAM robotics is:
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:
York Jong

Chiu-Yuan Fang's BEAM Walker Page - 0 views

www.geocities.com/...walk3.html

beam electronics robot walker

shared by York Jong on 26 May 07 - Cached
  • York Jong on 26 May 07
     
    Three motor designs are much more able walkers with longer strides and very tall steps. They are also a huge jump in construction complexity from a two motor walker. Walker Ver3.0 is controlled by a six-neuron nervous net. I opted not to go with the 4 neu
York Jong

Chiu-Yuan Fang's Book Store - 0 views

www.geocities.com/...amazon.html

book diy robot

shared by York Jong on 31 May 07 - Cached
  • York Jong on 31 May 07
     
    These are some books which can help you expand your knowledge in electronics and robotics. I'm selling these to you through the Amazon Associates program where you get the same LOW Amazon price and I get a couple bucks commission which will go straight to
York Jong

BEAM Reference Library -- BEAMbot Pieces - 0 views

www.solarbotics.net/...default.htm

beam collection electronics portal robot

shared by York Jong on 26 May 07 - Cached
  • York Jong on 26 May 07
     
    You'll be making use of a number of components in the creation of your BEAM robot. This section's pages describe the most-common of them.
York Jong

Intermediate Robot Building - 0 views

books.google.com/books

book choice electronics mechanics robot

shared by York Jong on 09 Sep 07 - Cached
  • This book provides far more detail on the hardware aspects of robot building than any other I have seen to date and is worth picking up.
  • "Intermediate Robot Building" offers the kind of real-world knowledge that only an experienced robot builder can offer--the kind of knowledge beginners usually have to learn through mistakes. In this book, you'll learn the value of a robot heartbeat and the purpose of the wavy lines in photocells.
  • York Jong on 09 Sep 07
     
    Intermediate Robot Building by David Cook covers all aspects of robot building, from mechanical, to electronics, to microcontroller selection.
York Jong

Photo Diodes - BEAM Wiki - 0 views

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

beam electronics sensor

shared by York Jong on 26 May 07 - Cached
  • To use a photodiode in its photoconductive mode, the photodiode is reverse-biased; the photodiode will then allow a current to flow when it is illuminated.
York Jong

Flashing LED - BEAM Wiki - 0 views

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

beam electronics sensor

shared by York Jong on 26 May 07 - Cached
  • A flashing LED is just an LED with a built-in microcircuit to cause it to flash periodically.
  • Like other LEDs, FLEDs are light-sensitive, and so flash faster in brighter light.
  • Like other LEDs, FLEDs are light-sensitive, and so flash faster in brighter light.
  • ...1 more annotation...
  • A flashing LED is just an LED with a built-in microcircuit to cause it to flash periodically.
York Jong

Capacitors - BEAM Wiki - 0 views

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

beam electronics solar

shared by York Jong on 26 May 07 - Cached
  • A device used to store charge in an electrical circuit. A capacitor functions much like a battery, but charges and discharges much more efficiently
  • BEAM robots tend to use capacitors in two, very different roles -- small ones in Nv neurons and solar engines (filter capacitors), and bigger ones as energy storage devices (storage capacitors).
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

1381* - BEAM Wiki - 0 views

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

beam electronics solar

shared by York Jong on 26 May 07 - Cached
  • 1381s are CMOS voltage-controlled triggers -- these "gate" a source until the voltage is above some "trip" limit, at which point it is allowed onto a third pin.
  • If you can't find 1381s locally, you might have better luck finding its European cousin, the TC-54 -- for details on it, see its data sheet.
York Jong

MC34164-* - BEAM Wiki - 0 views

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

beam electronics

shared by York Jong on 26 May 07 - Cached
  • 34164s are undervoltage sensing circuits ("voltage supervisors") designed for use as reset controllers in portable microprocessor based systems. We use them as 3- or 5-volt triggers (here, 3 or 5 fills in the "*" of the part number above), as the heart of the Chloroplast solar engine design.
York Jong

BEAMbot Circuits << BEAM Reference Library - 0 views

www.solarbotics.net/...default.htm

5star beam circuit electronics portal robot

shared by York Jong on 27 May 07 - Cached
  • York Jong on 27 May 07
     
    This section of the BEAM Reference Library is devoted to collecting designs (and links to designs hosted elsewhere) for circuits of interest to BEAMers.
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

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.&nbsp; 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.&nbsp; 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.&nbsp; Also keep in mind that some metals shield better than others.&nbsp;&nbsp; Carbon Steel shields several hundred times better than aluminum.&nbsp; 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.&nbsp; Don't run the wire parallel with wires that are used as signaling in your micro controller.&nbsp; 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

74*240-based photopopper circuits - 0 views

library.solarbotics.net/...bot_popper_240.html

5star 74x240 beam circuit electronics maxibug photopopper phototrope robot

shared by York Jong on 27 May 07 - Cached
  • This adapted photodiode is not as sensitive as large area types so C2 may need to be reduced to 0.01uF while the value of R2 and R3 can be increased by a factor of 10.
  • Two leaded phototransistors can also be used but may require extra shielding to reduce light current in the bridge to acceptable levels
  • basic photopopper functions plus reverse -- all on a single chip
  • ...8 more annotations...
  • The monocore capacitor is for positive feedback for fast switching between the two motors and to slow down and avoid high frequency oscillations.
  • R2 together with C2 limits the maximum frequency of the monocore and motor drivers when the light is bright and the sensors are equally lit
  • R3 together with C2 sets the minimum frequency of the waggle even in the complete dark which is more interesting than twirling endlessly in a circle.
  • Having said that, maxibug is not perfect: it churns its wheels while feeding and does not back out of the feeding station when full. CD MaxiBug v5 uses just a few more parts but has powerful and efficient motor drivers, its motors are off while feeding, and it backs up when full.
  • The CD Maxibug v5 uses just one 74AC240 chip
York Jong

74*14-based photopopper circuits - 0 views

library.solarbotics.net/...bot_popper_14.html

5star 74x14 beam circuit electronics maxibug photopopper phototrope robot

shared by York Jong on 27 May 07 - Cached
  • Droidmakr (Cliff Boerema) came up with an interesting idea for a light-tracking head with a form of peripheral vision. As often happens, the circuit turned into something different -- a photopopper:
  • All done with a single 74HC14 (the '240 being a motor driver).
  • I tried the same setup with the 74*240 (with an extra inverter per motor) and 7404, but the 74HC14 seems to work best.
  • ...6 more annotations...
  • John-Isaac Mumford started off by simplifying the Maxibug design, and wound up with an entirely new circuit -- Mazibug
  • The tactiles switches behave even more strongly: if a switch is closed then the bot turns away unconditionally. If both switches are closed the robots reverse straight back regardless of light level.
  • When the robot bumps into something on one side, it over-rides all the photodiode circuits and reverses the motor on the OPPOSITE side
  • From the title it would appear that all 4 photodiodes face forward but the 2 inner PDs face directly forward and the outer 2 are angled to the left and right
    • York Jong
      York Jong on 03 Jun 07
       
      behavior-based control that all done with a sigle 74HC14
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