Based on the Linear Technology LTC2054, this -48 V circuit was found in a 2005 manual. The circuit is powered with 5 V and can be used as a shield.
This simple transistor tester was found in a Japanese magazine in 1967. It tests general purpose...
This circuit, which appears on our website in different versions, uses an integrated VU which is...
This configuration of PWM control with the LM317 was found in a Popular Electronics from the 90s....