This circuit is from a 2004 documentation serving for signals from 1 MHz to 160 MHz. The antenna is of the telescopic type and the analog instrument is of the type found in old sound equipment.
This oscillator was found in a 1967 General Electric documentation. The UJT is P-channel, an unusual...
Found in an Elektor from the 90s, this circuit triggers a Sonalert-type buzzer when the sensor is...
This precision circuit can provide timings from 0.2 milliseconds to 3 minutes accurately. The...