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Hobby Circuits designed by Dave Johnson

Last Updated on: Friday, December 29, 2017 04:27 PM

List of Hobby Circuit Designs

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

DC to DC Power Supply Circuits
 
Circuits Designed by David Johnson, P.E. :

Digital noise generator

ELC signal between 200Mhz-400Mhz

Exciter Circuit-12v Touch Switch

FETs & Logic Devices Divides Supply Voltage on Charge Pump Efficiently 

Flexible Outputs from Square Wave Driver

Fluorescent Lamp Night Light Needs Only 1 Watt

Fully Isolated 50/60hz Sync Generator

Gated 125Khz Oscillator

Gated Crystal Oscillator with Very Low Power

Generate 0.5v Negative Supply

Laptop Power Supply

LC Oscillator Medium Power 125Khz

Negative 0.5 Volt Supply

Over-Temperature Micro-Power Alarm

Peak to Peak 300v Signal Generator

RS-232 Serial Interface Status Indicator Circuit

Simple Circuit Negative Supply Circuit

Touch Switch Exciter

Voltage Boost to Series Regulator provided by Capacitor

0.5v to 6v Voltage Converter

125KHZ Medium Power Oscillator

125khz Oscillator with Medium Power

125Khz Ultra Pure Sine Wave Signal Source

24v NiMH Battery Charger using a 12v Solar Panel 

5+V Classic Linear Supply using 6.3VAC Transformer

Astable Multivibrator with Very Low Power

Battery Powered Plus-Minus 15v Supply

Charge Pump Battery Charger-+5 Volts

CMOS Inverter forms a Resonant LD Oscillator 

CMOS Inverters Form 125Khz Oscillator


 

Hobby Circuits by Category

Dave's Circuits

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

 


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