This low power circuit can be powered with voltages from 1.8 V. We find it in a 80s Hands On Electronics. The load can be from 8 to 32 ohm.
We found the circuit of this Japanese transistorized commercial receiver in a documentation from...
In the figure we have a constant current source for Shape Memory Alloy or (Nitinol). The...
We found this circuit in the Texas Instruments opto-electronics manual. The button resets and the...