This transmitter for the 40 meter or 7 MHz band was found in a magazine 73 for radio amateurs of the 90s. The circuit has a power of ½ W.
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...