This circuit provides a reference voltage for calibration. He uses a diode in a small thermal chamber. We found this circuit in an old american documentation.
This circuit can be used with any auio amplifier, converting it into a AM receiver. Antenna is a...
We found this circuit in a 90s Radio Electronics. The circuit generates frequency-modulated 220 kHz signals. The...
The presented circuit can excite small piezoelectric transducers or ceramic buzzers. These...