We found this TTL power supply circuit in the December 1972 issue of Radio Electronics magazine. The circuit uses a 1 A transformer and the 2N3055 transistor must be equipped with a good heat sink.
We found this time base of 0.1 to 90 seconds in a circuit manual from the 90s. The single-use...
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What differentiates this circuit from the previous one (CB15613E) is the non-need to use a...