We found this circuit in a 1965 Electronic Design. Transistors are still common but admit equivalents for some of them. The circuit drains a current of only 4 mA.
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This circuit uses only two general purpose transistors and can be powered by the circuit under...
November 2016 - Ohmite resistive current sensor chips with resistances from 10 mΩ to 100 mΩ in SMD...