This tunable circuit was found in the May 1994 issue of Electronics Now magazine. The circuit has two amplification stages and excellent gain.
We found this two stage transistor amplifier circuit using RC coupling in a magazine published in...
With a touch of S1 this circuit keeps a small strand of nichrome warm enough to light a cigarette....
August 2016 - It can be obtained from Mouser Electronics the new temperature and humidity sensors from...