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

DiscoverCircuits.com, has 40,000+ 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


Hobby Circuits designed by Dave Johnson

Last Updated on: Thursday, November 23, 2017 04:57 AM

List of Dave's Circuit Designs

Text & Graphics Copyright David A. Johnson, P. E. -- ALL Rights Reserved.
LINKING to Dave's circuits is permitted but DO NOT COPY to your WEB SITE server!



24 Volt Day Night Switch

24v NiMH
Battery Charger using a 12v Solar Panel 

2Mhz Broad Band Optical Fiber Receiver

2uS Light Pulse Receiver

30Khz Light Receiver Amp

3mw Laser Test-20Mhz VCSEL

40Khz Burst Laser Diode Driver

40Khz Laser Burst Detector

40Khz Light Detector with High Ambient Light Immunity

40KHz Light Detector with Sunlight Immunity

40KHz Light Receiver Front-End Circuit

40KHz Modulated Light Detector

40khz TV-VCR Light Source Repeater

50Mhz Broad Band Optical Fiber Receiver Version A

5Mhz Broad Band  Optical Fiber Receiver

6V to 24V DC Day/Night Switch

8-Solar Cell Lithium Ion Battery Charger Version 2

AIR Transparency Monitor-Pg2

Ambient Light Dectector with Compensation

Amplifier for a Xenon Lamp Flash Detector 

Broad Band 2Mhz Optical Fiber Receiver

Broad Band 50Mhz Optical Fiber Receiver Version A

Broken Solar Panels

Capacitance Touch Switch

Cascode Light Receiver Circuit

Cell Phone Solar Powered Charger

Clear Fluid Detector #2

Clear Fluid Monitor

Color Film Makes Optical Filter

Convert Solar Powered Light to Flasher

Dark Activated 12v Power Supply Switch

Day/Night Switch-24vAC Powered

Detect Clear Fluid

Detect Short Xenon Lamp Flashes

Detects Xenon Lamp Flash

Dusk To Dawn Latching Relay

Eight-Solar Cell Lithium Ion Battery Charger Version 3

FET Input High Speed Light Detector

Fully Isolated 50/60hz Sync Generator

High Ambient Light Immunity Light Detector 

High Ambient Light Immunity with a 40Khz Light Detector

High Speed Light Detector from FET Input

High-speed 75MHz light receiver

Honeybee Counter

Ideal Blocking Diode Circuit for Photovoltaic Solar Panels

Ideal Diode for PV Panels

Ideal Diode Function

Improve Response Time of a Photo Transistor Circuit

Improved Solar LED Spot Light

Improved Solar Path Light

Indicates when it is Time to Dust

Infrared Remote Extender Circuit

Insolution_Meter_Solar

It's Time to Dust Indicator

Laser Burst Light Detector

Laser Light Detyector-10Mhz to 20Mhz

Laser/LED Light Output Intensity Meter

Latching_Relay_Dusk_To_Dawn

LED/Laser Light Output Intensity Meter

Light Detector

Light Detector with High Ambient Light Immunity

Light Intensity Monitor

Light Monitor Circuit

Light Pulse Receiver (2uS)

Light Pulse Receiver + Post Amp

Light Receiver 30Khz Amp

Light Receiver Front-End Circuit

Light Receiver Works from 1Khz to Over 70Mhz

Light Receiver-10MHz to 20MHz

Light to Frequency Converter

Line-Powered Xenon Flash Transmitter

Low Power 40KHz Light Detector

Low Power Amp Monitors Light

Low-power optical interrupter

Micro Power 40Khz Burst Laser Diode Driver

Modified Cheap Solar LED Path Light

Modified LED Night Light

Modulated Light Monitor #1

Modulated light receiver circuit

Modulated Light Receiver Front-End Circuit

Modulated Light Receiver uses a Single IC

Momentary Touch Activated Switch

Monitor Clear Fluids

Night Light from White LED

One-Watt White LED Night Light

Operation of Cascode Light Receivers

Optical Fiber Receiver-5Mhz Broad Band

Optical Filter using Color Film Negative

Optical Interrupter Draws Microamps

Optical RFID Test Circuit

Photo Transistor interface Circuit

Photovoltaic Solar Panels-Ideal Blocking Diode Circuit

PV Solar Cell Test Fixture

PV Solar Panels-Ideal Blocking Diode Circuit

Reduce voltage to Photovoltaic Solar Panel with Ideal Diode

Remote Extender Circuit

RFID Test Circuit

Safety Light

Salvaged Broken Solar Cells

Shop Safety Light

Simple Circuit for White LED Night Light

Single IC forms Senesitive Modulated Light Receiver

Slotted Opto-Sensor used in Honeybee Counter

Slotted-Type Optical Interrupter Draws Microamps

Snow Depth Alarm

Solar Cell Test Fixture

Solar Insolution Monitor

Solar Insolution Meter

Solar Lithium Ion Battery Charger using LT1132

Solar Path Light Improvement

Solar Powered Cell Phone Charger

Solar Powered Flood Light using NiMH
Cells

Solar Powered Infrared 1W Security Camera Illuminator

Solar Powered Lithium Ion Battery Charger

Solar PV Cell Test Fixture

Solar-Powered Pump Motor Controller

Tester for Modulated Light

Time to Dust

Touch Activated Switch

Transmitter for Line Powered Xenon Flash

TV-VCR Light Source 40Khz Repeater

Ultra Low Power Detects Clear Fluid

Use Color Film Negative to Make an Optical Filter

Variable Isolated AC Voltage Spans 0VAC to 280Vac

Water Pump controlled by Solar Power

Xenon Flash Receiver-Pg2

Xenon Lamp Flash Detector Amplifier

 

Hobby Circuits by Category

eMail:
  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 - November, 2017     David A. Johnson & Associates.  All Rights reserved. 
 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.