Using red LEDs with ignition voltages of the order of 1.5 V we can make a multiple voltage reference. Current is low.
We found this probe circuit for frequency meters up to 10 MHz with a sensitivity of 10 mV, which...
The circuit shown in the figure consists of a phase shift oscillator and its components have been...
This traditional configuration was obtained in a 1986 publication. The speaker can be replaced by a...