Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches

Circuits designed by David Johnson, P.E.
Last Updated on: Friday, December 29, 2017 02:53 AM

Text & Graphics Copyright David A. Johnson, PE  --  ALL Rights Reserved.
LINKING to Dave's circuits is permitted but COPYING CONTENT to your WEB SITE server IS NOT!

Control Circuits

Circuits Designed by Dave Johnson, P.E. :

Infrared Safety Switch

Infrared TV/VCR Remote Booster

Isolated Remote Switch Circuit

LED Flashing Badge #1

LED Flashing Badge #2

Light/Dark 12V Switch

Lighthouse LED Flasher

Line Powered White LED Array

Line-Powered Xenon Flash Transmitter

Logic Controlled 12v DC Motor with Automatic Brake

Low Battery Voltage Flasher

Low Power H Bridge Motor Controller

Low Power Universal LED Flasher

Low Voltage 120vAC Power Line Alarm

Low Voltage Latch Circuit

Micro Power Over-Temperature Alarm

Night Light from White LED

Pot Controlled Variable LED Intensity Circuit

Power Line Alarm

Pushbutton Activates Service Request Beeper

Pushbutton Controlled Up/Down Ramping Light

Ramping LED Driver

Rapidly Stops DC Motor Drive

Remote Extender Circuit

Remote Relay Driver

Restaurant Table Service Request Flasher

Shadow activated (or hand wave) Motion Detector

Shooting Range Flasher

Simple Circuit for White LED Night Light

Solar-Powered Pump Motor Controller

Solid State Relay Requires Only 50ua Drive Current

Sound Triggered Night Light

Super Bright 3v Powered LED Flasher

Switch Detects Audio Signal

Ten-LED Sequential Flasher using Low Powr

Three-Minute Closet Light

Touch Activated Switch

TV /VCR Remote Range Extender Circuit

Two Pushbutton Motor Controller

Ultra Low Control Current Isolated Relay

Ultra Low Current 3v LED Flasher #3

Ultra Low Current Oscillator

Under/Over Voltage Alarm on AC Line

Underground Gate Opener

Universal LED Flasher


Up/Down Ramping Light Pushbutton Control

Version a of 1.5v LED Flasher

Wig/Wag LED Flasher

Wireless LED Flasher

Xenon Lamp Flash Detector Amplifier

Xenon Photoflash Controller

1 Watt Fluorescent Lamp Night Light 

1.5v LED Flasher Version A

1.5V Touch Activated Switch

10 LED Sequential Flasher using Low Powr

120 VAC Low Voltage Alarm

12v Cooling Fan Thermostat

12v Light/Dark Lamp Switch

12v Touch Switch Exciter Circuit

3 Volt Low Battery Voltage Flasher

3-Minute Closet Light

3-Minute Closet Light #2

40Khz LED Test Signal Generator

40khz TV-VCR Light Source Repeater

555 Timer Forms Simple PWM Motor Controller

5w Fluorescent Lamp Intensity Modulator

60 Watt Lamp with Auxiliary 14v LED Lamp

6V to 24V DC Day/Night Switch

9v Powered Xenon Photoflash Controller

AC Current Controls Hour Meter

AC Power Line High/Low Voltage Tester

AC Power Loss Alarm

Advertising Badge #1 with Flashing LED

Advertising Badge #2 with Flashing LED

Alternating CW & CCW Motor Driver

Amplifier for a Xenon Lamp Flash Detector

Audio Activated Switch

Audio Frequency Digital Noise Generator

Battery Free LED Flasher

Brush Motor Speed 12V Controller

Charge Coupled Bi-Directional Power MOSFET Relay

Circuit Protects from Battery Polarity Reversal

Closet Light with Automatic 3-Minute Timeout

Computer Controlled PWM Circuit

Convert Solar Powered Light to Flasher

Five-Watt Fluorescent Lamp Intensity Modulator

Flashing LED Power Indicator

Freeze Alarm

Freezer Over-Temperature Alarm

Freezing Temperature Alarm

High Intensity Line Powered LED Flasher

High Power Flashing LED

High Power LED Flasher

Incandescent Lamp Inrush Current Limiter


Dave's Circuits

Hobby Circuits

  David A. Johnson, P.E. about these circuits


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches

 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy

Copyright  January, 1998 - December, 2017     David A. Johnson & Associates.  All Rights reserved. 

 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.