This electronic Morse Key for telegraph message transmission was found in an American 1980s amateur radio documentation. The circuit uses TTL technology and must be powered by a 5V voltage.
This circuit was found in a 1980s documentation but can be easily assembled even today by the...
This decoder circuit 3 of 8 was found in a publication for PCs from 1992. The circuits are TTL and...
This transmitter for the 7 MHz range, as we can assume by the number of turns of the coil, since the...