This circuit was found in documentation from the 90s, being indicated for the deflection of cathode ray tubes. It consists of a DC voltage amplifier and operates at frequencies up to 1 kHz.
The output transistors of this circuit can be TIP31 and TIP32. The other transistors admit...
This oscillator with crystal for overtone operation was found in an old American documentation. The coil...
Old multimeters used a 22.5 V battery for high resistance measurements. If you have one, you...