Used by radio amateurs to accompany telegraphic transmissions, this circuit generates an audio tone. The power comes from the transmitted RF signal itself.
This circuit has several features, such as timing to activate and deactivate, in addition to a...
The 4528 is a dual-retriggerable monostable that needs only the timing network formed by R and C...
This circuit from a 1978 American publication is used on vintage vehicles that still have contact...