12-bit DA converter (CB9331E)

We found this circuit in documentation from Analog Devices from the 90s. The components are from that time, uncommon today.

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Divider by 5 Counter (CB25363E)
This TTL circuit was found in the December 1990 issue of Radio Electronics magazine. The circuit has...
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Found in an Electronics World of 1968 this circuit can use any SCR and diodes depending on the...
Wireless CW Monitor (CB4179E)
Placed near a telegraphic transmitter (CW) and with a small antenna or pickup, it reproduces the...