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We found this circuit in GE's 1977 semiconductor manual. The optical isolator uses an opto-SCR, and the lamp must be 25 W maximum. Only incandescent lamps should be used.
This circuit is from the 1974 Motorola Unijunction Trigger Circuits for Gated Thyristor. The triac...
Found in old American documentation, this circuit can divide the frequency of a signal by 2 or 3...
This transceiver is also low power, but this time, it can generate signals in the 144 MHz band. In the...