This circuit was found in the December 1992 Radio Electronis magazine. R2 is an NTC, there is a MOV protector or NTC thermistor. The current depends on the thermistor used.
This circuit uses a common multimeter on the voltage scale to measure the beta gain of a...
This amplifier is from a 1990s Linear Technology component manual. The circuit requires...
Found in a Hands On Electronics of the 80s, this circuit makes use of a gas sensor of the time....