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The Interesting World of Stepan Novotill

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


Biofeedback related stuff! Here are some resources on various biofeedback related topics.

...click here.


Electronic circuits that I have designed and built. Some may be unsafe or contain errors. No warranty. Do not build any of these.

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


Reverse engineered schematic diagrams of real products. Some may be unsafe or contain errors. No warranty. Do not build any of these.

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


Help getting your old test and measurement gear working. Some info may be unsafe or contain errors. No warranty. Do not rely on this info.

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 soruces. Some info may be unsafe or contain errors. No warranty. Do not rely on this info.

Standard Metric, American, and Imperial wire size chart


This is only a graphic due to spam     Some Links: BAMA Manuals
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