This circuit makes use of components from the time it was published. The TCA151 is not a common component today. The circuit generates 10 to 10 kHz signals.
This circuit causes an LED to flash if the monitored voltage exceeds the value set in the pot. The...
This circuit is from a Radio Electronics magazine from August 1990. The indicator module is of a...
The modified Hartley oscillator seen in the figure can generate signals ranging from 3 MHz to 10...