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.
The power of this small amplifier reaches 75 mW per channel depending on the voltage and the load...
This circuit can be used as a shield to control the matrix flow of 100 LEDs from a single output of...
The circuit shown below was found in the National Semiconductor Linear Applications Handbook...