R1 may be 10k and R2 100k. The transistor can be the BC548 and instead of the small lamp we can use a series LED with a 1k resistor. D1 is germanium and C1 is 10 nF. C2 can be 47 nF.
This unijunction transistor oscillator is intended for Morse code practice. The circuit is from an...
This basic tone control circuit employs a Philips NE5538 operational amplifier, but can be adapted to work...
August 2016 - It can be obtained from Mouser Electronics MDS adapters for medical use from Delta...