This sophisticated decade of benchtop resistors was found in the November 1989 issue of Radio Electronics magazine. The circuit is supposed to use precision resistors.
This simple test lets you measure zener voltage. The power must be higher than the diode tested...
The purpose of this modified astable is to make the initial pulses have the same duration as the...
Originally this circuit is from an English magazine, but I found it in Argentina's Radio Chassis...