This SCR relaxation oscillator was found in an 80's Electronic Design. It flashes a small incandescent lamp in frequency that depends on the capacitor.
This simple, unregulated power supply is indicated for non-critical projects that require currents up...
This circuit is suitable for isolating audio signals, as it has very low distortion. The used...
This circuit was designed to work with the previous one in triggering a relay by the sounds picked up...