Found in Unitrode documentation from the 1980s, this circuit makes use of PUTs, currently common components. The circuit must be powered with voltages around 15 V.
This circuit indicates the resistance of the skin of those who hold the electrodes. RV1 makes the...
This circuit makes use of an old operational and matched transistors. The circuit can be...
The circuit shown is from National Semiconductor, having been found in the 1994 Linear Application...