555 Timer/Oscillator  741 Op-Amp  Capacitors  Diodes & Diodes Data   Light Emitting Diodes (LED)nbsp;  Converting Frequency to Channel #'s  MosFet Test  Piezo Education/Tutorial  Phase Locked Loop  Resistor Color Code  SCR Test  Transistor Tutorial, 12 Parts!   Triac Test  UJT Test  Coils  Toroids RF/EMI  Make Your Own Shunts  Relays, Relay Drivers, Solid-State  555 Timer Tester - Test those 555's in your junkbox  555 Go-No/Go Tester - 555 tester, more advanced  7.2Volt Cycler - 7.2V NiCad packs  7.2V Field Charger (.pdf file)  Airtronics AM/FM - Trainer Cord  Automatic Device Locator - Beacon  Auto Pilot for R/C - Commercial device  9-V Nicad Charger - From the Netherlands  Back and Forth Flasher - Forrest Mims III  Battery Backup (1) - For Large Aircraft  Battery Backup (2) - A better type  Battery Cycler - For Rx/Tx NiCads   BEC Speed Controller - Stefan's Website  Car NiCad Charger - Using car battery  Charger - Constant Current Charger  Circuits for the Hobbyist  Crashed Plane Locator - Beacon  DCS 400 Multipurpose Connector  Discharger - NiCad discharger  Elevon Mixer - by Malcolm Aldred  Futaba-AM - Trainer Cord  Futaba-FM - Trainer Cord  Futaba to JR - Trainer Cord  Futaba (AM) to Futaba (FM) - Trainer Cord  FlyWire (Deans Ant.) - For Helicopter  Glowplug Driver - Project for your Flightbox (1)  Glowplug Panel - Project for your Flightbox (2)  Hotchek - Hotcheck (.pdf - See note 1)  Hot Wire Foam Cutter, 1 - by Tom Weedom  Hot Wire Foam Cutter, 2 - by Charles Wenzel  Hot Wire Foam Cutter, 3 - by Steven Mohr  Hot Wire Foam Cutter, 4 - by JoeBoy  Hot Wire Foam Cutter, 5 - by The Hermit MachineShop  Hot Wire Foam Cutter, 6 - by Al Schoepp  Link  Hot Wire Foam Cutter, 7 - by Rocket Team Vatsaas  Hot Wire Foam Cutter, 8 - by Daniel Hartman  Hot-Wire Foam Cutter, 10 - by Tony van Roon  IRF-511 FET - TMOS FET Data Sheet

JR-FM - JR Trainer Cord  Lead Acid Charger, 1 - For Gel-Cell Batteries  Lead-Acid Charger, 2 - Battery Charger  Lead-Acid Charger, 3 - Charger with 'Float' Mini-Drill P.S. - Variable speed for your mini-drill Modifying a Servo - Modifying for indefinate rotation  Model Rocket Launcher - Time delayed  Model Rocket Launch Controller - Matthew Hewson  Model Rocket Timer - The half-ounce one  Model Rocket Strobe - Xenon Flash Tube  Model Rocket Parachute - Delayed  Model Rocket Altimeter - PIC Based  Model Train Lights - Head Lights for Model Trains  Model Train Horn, 2-tone - Dual Tone  Sound    Model Train Website - Excellent site by R. Paisley  NiCad Sensor - NiCad Voltage Monitor for Rx  Night Blades - Helicopter night-blades  Noise Trap - For long servo leads  Added schematic  PCM/PPM Locator & Voltage Watch - by M.J. Pawlowsky  Power Panel - Combine it with the Glowplug Driver  Proportional Radio Control  R/C Digital Camera Controller  R/C Emergency Locator Alarm - by Jon Fick Code/Description  More PIC codes and articles - by Jon Fick  R/C Helicopter Camera  R/C Pilot  PCB & Layout 11-04-2006  R/C Switch 2 - For driving accessories   R/C Switch 3 - Similar, but with 4001  R/C Timer Switch - Adjustable, 20-80 seconds  R/C Switch 4 - Modified to use Infra-red cameras  R/C Switch 5 - Electric Motor Switch   Receiver Regulator - Rx Down-converter to 5V.  RX-Volt - Dot/Bar Rx Voltmeter.  Simple Charger - With 'Peak-Detect'  Simple Constant Current Source - by John Nooyen  Sequencial Led Flasher  Servo Driver #1  Servo Driver #2  Servo Driver #3  Servo Driver #4  Servo Modification  Servo Driver/Fuel Mix calculator - by Andy Batts  Servo Driver using PIC  Servo Modification - For contineous rotation  Solar Charging - NiCad Charger  Toy Car Tx/Rx 27MHz - plus 49Mhz  Stop-signal Override for Model Railways  Tail Nav Light - For Heli or Aircraft  Variable Power Supply - 1 to 30V/1.5A   Wingtip Nav Lights - Like the real thing  ZAP Adapter - Rejuvenate 'dead' NiCads.  Electronic Symbols Template Hobby Kits for your building pleasure  "Green" means on-line, "Red" means off-line Bookmark this valuable page with 'Ctrl-D'.

Note 1: The "HotCheck" pdf file belongs to Brent's website but it appears to be off-line for a long time. Here is Brent's pdf file for your building pleasure until I can figure out what's up with his website.

Just in case you're gonna ask: All drawings are created with Paint Shop Pro

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 Circuits Archive - Older circuits. Most are working, some are not. Could be still useful
 My Circuits Page - More interesting circuits can be found here.
 Radio Shack Partnumbers - For the most common parts
  Resistor Value Calculator - By Danny Goodman, AE9F
 Data Sheet - Pin-outs for a variety of other components
 TUP/TUN/DUS/DUG - Elektor's Semiconductor Substitute system
 Toroids, RF/EMI Cores - Variety of commonly used toroids, colors, etc.
 Zapping NiCads/Lithium-Ion batteries - Getting the most from your batteries
 LM301A - High Performance OP-AMP
 LM334 - Three Terminal Adjustable Current Source
 LM3914 - Dot/Bar Display Driver Data Sheet
 MC1455 Timer IC - CMOS Timer/Oscillator (CMOS) Data Sheet
 MC14001 - Quad 2-input NOR Data Sheet
 MC14013B - Dual Type D Flip-Flop Data Sheet
 MC3456/MC3556 Timer IC - CMOS Dual Timer/Oscillator Data Sheet
 MC14069UB - CMOS Hex Inverter Data Sheet
 MC14093B Schmitt Trigger - Quad 2-input NAND Schmitt Trigger Data Sheet
 NE555 Timer IC - Timer/Oscillator Data Sheet
 NE556 Timer IC - Dual Timer/Oscillator Data Sheet
 PN100/200 - Data Sheets for the PN100 and PN200
 LF13741 JFet OpAmp - Monolitic JFET Input OpAmp Data Sheet
 Thomas Scherrer's (OZ2CPU) Website - Glowplug driver mod's, UHF downlink, and more!
 Brent's R/C Electronic Page - Optoglow, Reverser, Go-slow, HotChek.
 Dave's R/C Circuits - Couple very good circuits
 Johann Aichinger R/C Electronics Page - Excellent site, damn all those bloody pop-ups
 Model Railroad Electronics from Rutger - Flasher, crossing, etc.
 Stefan's Electric R/C Website - Miniature Speed Controllers, and more!
 Sirius Datasheets - for jumpering the charging diode in transmitters


Questions? Answers? Tips? Please use the Forum: Tony's Forum

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DISCLAIMER: Although tested with my own JR gear, I take no responsibility whatsoever for the use and/or implementation thereof, or the misuse leading to damage of your R/C equipment by using any of the above circuits.
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Copyright © 1995 - Tony van Roon (VA3AVR). ALL RIGHTS RESERVED
Last Updated: January 13, 2011