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Safety, accuracy and completeness of information provided herein is not guaranteed,
so be inspired by it but do not use it as a basis for experimentation or other actions.

Reverse engineered schematic diagrams of real products:

Small DC to DC converters

LED flashlights

Piezo Vibration Sensors

Toy PM Motor Drive Circuits

Photocell Activated Toys

Small Motor Speed Regulator

Doorknob Proximity Alarm

IR Heart Pulse Monitor

Lightning Storm Detector

Electronic Canary

Refrigerator Pig

LED Lights for AC line

Solar Powered LED Garden Light

Stud Sensor Automatic

Unusual Radar Detector

Tape Head Demagnetizer Cassette

Flashlight Timer

Ultrasonic Pest Repeller

Personal Alarm

Photo Flash at 1.5 volts

Sound Activated Toy

Wall Clock Governor Driver

Tiny RC Cars TX and Charger

Single Channel RC Cars TX and RX

Multi Channel RC using CMOS

Bathroom Deoderizer Control

Ceiling FanSpeed Control

Color Organ Light

Delayed Off Light Switch

Deoderizer Fan Pushbutton Timer

Digital Timer Light Switch

Dynamic Microphone Preamp

Flashing Flashlight

Flashing Road Barricade

Hand Clap Lamp Control

Lamp Dimmer

Radio Controlled 3way Light Switch

Template for private use


Electronic circuits that I have designed and built:

Solar Engine Circuit - Utra Efficient circuit runs small DC motor in a poorly lit room

Flickering Fire Light - LED or Bulb flicker shimmer randomly like candle flame or fire

Electronic Combination Lock - Very simple circuit allows up to 9 digits

LED boost switcher - Single AA cell powers two LEDs at constant current

Computer fan speed tacho out circuit - Add a fan speed monitor lead to any 12V two wire fan

LED buck PFM - Powers LED with constant current starting at 100mV over Vf

Constant Brightness LED Stroboscope - For measuring the speed of small motors

Strange LED sequencer - This bizzare but simple PWM circuit fades from LED to LED

Stepping Motor Driver - Minimalist circuit uses one CMOS gate and is reversible

Sound Blaster Preamp - Fixes that well known problem and needs no batteries

Rgb To Monochrome converter - Matches impedance of PC to CCTV monitor


Information on specific Test & Measurement gear:

Quadtech or Genrad 1659 1692 1689 Digibridge

Anatek 50-1S Variable Power Supply

Genrad 1687 Megahertz Digibridge

RF Millivoltmeter Microwattmeter Probes

HP 3456A Multimeter


Technical information compiled from various sources:

Copper Wire Size Comparison Chart Metric and Imperial

Fractional Inch to Decimal & Metric Conversion Chart Table


Computer software and utilities:

Start Wayland Gnome Remote Desktop for RDP via SSH on Debian

Porting Keil A51 assembly code to SDAS AS8051 asm format

Porting Keil C51 code to SDCC C language format

Unicode Keyboard Input U+‹Hex› for Windows

Self Numbering HTML Headings via CSS

All HTML Text Styling Tags Demonstrated

Documentation Template


Biofeedback and mind-body related topics:

Many free BioEra designs


My youtube videos - This is great fun and spurrr of the moment, but it's not why you're here...


Safety, accuracy and completeness of information provided herein is not guaranteed,
so be inspired by it but do not use it as a basis for experimentation or other actions.

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