This amplifier for instrumentation with very high input impedance was found in a manual of JFET circuits. The operational ones used are current and the power supply must be symmetrical.
In this circuit, the LED Will blink in a presence of na áudio signal in the input. Gain is...
This synthesizer circuit was found in a Radio Electronics magazine from May 1983. The circuit uses...
This circuit was found in a documentation of the 70s. The circuit uses an integrated that is not...