This instrumentation circuit was found in the September 1989 Radio Electronics magazine. The circuit uses an analog indicator and the power supply must be symmetrical.
The transistor of this circuit can be 2N2222 or BF494. The coil can have 2 to 8 turns of wire 22...
This circuit is from the Linear Applications Handbook from National Semiconductor, providing an...
September 2016 - Mouser Electronics already has the new TPS54335-2A from Texas Instruments...