The circuit uses only one IC, the well-known LM317, a low-cost power-supply regulator. Using this chip, you can modulate the adjustment-pin input with the audio signal from an electret condenser ...

We’ve previously remarked upon a generation lucky enough to be well-versed in microcontrollers and computersised electronics through being brought up on the Arduino or the Raspberry Pi but un… ...

Schematic of Audio Compression Amplifier Circuit. Advertisement. TL081 datasheet. Circuit function. Advertisement. Partner Content. Hybrid Matrix LED Driver Technology. 07.09.2025. Seven Powerful ...

Carbon microphone amplifiers may be rare today, but for all that we’ve touched on them before. Continue reading “A Hundred Year Old Solid State Amplifier” → ...