This 1965 circuit uses a Philips 4068 tube to measure extremely small charges. The circuit has as indicator a micro ammeter and the transistors are of the time.
September 2016 - Mouser Electronics already has in stock the new IC TPS92515 LED driver from Texas...
This crystal-controlled oscillator can generate signals as high as 200 MHz. The L1 coil is made up...
This MOSFET amplifier operating in the VHF range was found in an old American telecommunications...