This 200 kHz oscillator was found on a 90's EDN. It consumes only 2.8 mW and has CMOS compatible output. CMOS power pins are not indicated.
With only one integrated circuit and few additional components, this amplifier has an output power...
For the 7 to 10 MHz band L1 is formed by 3 turns of 22 to 28 AWG wire in a ferrite core 15 to 20...
The circuit shown in the figure, activates a bar of 4 LEDs with an audio signal applied to its...