In the figure we have the basic configuration of an operational amplifier for audio signals. The circuit is from a Radio Electronics from the 90s. The power supply must be symmetrical.
This 10 mA microammeter circuit can measure currents of 50 uA. The circuit is from a publication from the...
This circuit charges a battery to power a flashlight at night. The circuit is from an English...
We found this transistor siren in an old English publication. The transistors are from the era,...