Found in Popular Elecronics, this configuration also appears in this section, but obtained from other sources. The 14.4 V supply allows the circuit to be used in the car.
This full wave source uses germanium diodes, and its current is a few milliamps. We found it in an...
This circuit was found in an 80's Electronic Design. The frequency depends on the crystal and the...
Found in an American publication from 1968, this circuit generates pulses at a rate of 2,500 per...