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Hobby Circuits designed by Dave Johnson

Last Updated on: Tuesday, June 01, 2021 03:22 PM

Text & Graphics Copyright David A. Johnson, PE  --  ALL Rights Reserved.
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FreeSpace (Light Beam) Communication Circuits
Circuits designed by David Johnson, P.E. :

High Ambient Light Immunity Light Detector

High Speed Light Detector from FET Input

Laser Light Detyector-10Mhz to 20Mhz

Light Receiver 30Khz Amp

Light Receiver-10MHz to 20MHz

Light to Frequency Converter

Light, LED/Laser, Output Intensity Meter

Nitrogen Spark Generator

RFID Test Circuit

Tester for Pulsed LEDs

Transmitter for Line Powered Xenon Flash

Xenon Flash Receiver-AIR Transparancy Monitor

Xenon Flash Transmitter-AIR Transparency Monitor

100Khz Low Power Light Receiver

1us LED Pulse Driver + Voltage to Frequency Converter

40KHz Light Detector with Sunlight Immunity

Ambient Light Dectector with Compensation

Fluorescent Lamp Intensity Modulator


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