Despite being transistorized, this is a constant current source circuit for 1 V valve filaments such as the 1H4 tube.
June 2016 - Mouser can immediately deliver the TPS54xx plate for experiments with Buck converters from...
November 2016 - New mCube MC3635 3-axis accelerometers with I2C and SPI interfaces in 1 to 16 g...
This circuit lets through the 300 Hz to 3kHz range that corresponds to the human voice. We found it...