We must admit that we’ve been guilty of using a microcontroller to make two LEDs blink alternately in the past. It’s not the worst transgression, but it stems from our discomfort with analog circuits.

Using modulated rectangular waves of different time periods, the circuit presented here produces ringing tones similar to those produced by a telephone. The circuit requires four astable ...

My teacher friend was looking for Christmassy technology ideas for a science + engineering club. And I said that flashing leds might be good, and if you can get three phases going, you can have a ...

Pondering how the three-way multivibrator worked in the way home, I decided that the base waveforms must be overlapping triangle waves – which would give a good reason for the nice 120° output ...

A very simple portable 12 to 250V converter can be designed using this circuit diagram. This 12 to 250V converter is designed for portable use with a 12 V car battery.A built astabil multivibrator T1 ...