Electronics Reference Library – Bill
Basic Electricity – Start here if you don’t know anything about electricity or electronics. These pages cover the basics. They are great for young students. Circuits in this list range from very simple (1 star) to very complex (5 stars). Suggestions for circuits that should be added are always welcome.
Electronics Reference Library – Bill
Resistor Color Codes, Transistor Pinouts, Perf Board, Custom Etched Circuit Boards, Enclosures. Custom Front Panels, Safety Considerations.
Low Power LED Flasher- This circuit is used in emergency flashlights on airplanes and in other public places. Though you may not have known it till now, the LM3909 is everywhere!
How can an LED be illuminated by a 1.5V circuit, when the forward voltage of an LED is about 2V? The LM3909 uses the 100uF capacitor as a charge reservoir, building up a voltage of about 2V before discharging the cap through the LED.
