dapj Web - http://www.dapj.net/
Schematics of delabs - http://schematics.dapj.com/
delabs Schematics http://www.electronics-circuits.com/tech/
Diode Reverse Bias Leakage Tester http://schematics.dapj.com/2008/12/diode-reverse-bias-leakage-tester.html
Voltage Doublers and Multipliers http://schematics.dapj.com/2008/12/voltage-doublers-and-multipliers.html
Making a 74HCT540 LED Controlled Flasher as Annunciator http://schematics.dapj.com/search/label/LED-Circuits
Digital Potentiometer http://schematics.dapj.com/search/label/Digital-Circuits
High Resistance Meter (untested) http://schematics.dapj.com/search/label/Test-Measurement
Flashing Mains Neon Light Bulb http://schematics.dapj.com/search/label/Discrete-Circuits
DIY, Home Built iPod Charger, Build or use at own Risk! - iPod is a valuable asset so i recommend use one from Apple Store http://schematics.dapj.com/search/label/Power-Supplies-2
Mains Adapter Converts 230V AC 50 Hz to Rectified DC which replaces a Battery Pack. It was also called Battery Eliminator by older generations as it was used to save Battery Cost in AM Radios. http://schematics.dapj.com/search/label/Power-Supplies
LED Night lamp, Clock Lamp to see time at night. It is a Green Lamp just 50mA, but its Blue in Color. http://schematics.dapj.com/search/label/LED-Lighting
Lots if Light on One Watt, yes this works, but should be built by those experienced in High Voltage usage and Knowledge of insulation techniques. http://schematics.dapj.com/search/label/LED-Lighting
Perpetual Candle - Emergency Light 1W using LEDs, Solar panel can be also integrated. (this circuit is obsolete now) see next or http://san.dapj.com/de-crafts/perpetualcandle
First Revision, Forced to add 3.9E on each LED for current sharing as LEDs were not matched. Not Required if you use One high current single die led. http://www.dapj.net/hobby/?page_id=606
I fixed a China Torch with New LEDs and a Diode, it failed probably on a drop shock, the battery wire cut ... then when put on charge Few LEDs went bad, as battery was absent in ckt. http://schematics.dapj.com/search/label/LED-Lighting
Build a DMM or digital multi meter and Small Electronic Testing Tools http://www.delabs-circuits.com/cirdir/tools.html
555 based Inverter - Doc not complete http://www.electronics-circuits.com/tech/2010/07/555-multivibrator-like-power-oscillator/
