This circuit can modulate a laser rate at frequencies of 50 kHz. We found the old documentation. The bipolar transistors can be the BD135 and 136 and the FET admits equivalent.
This power supply for TTL and CMOS circuits with a voltage of 5 to 15 V was found in the Special...
This circuit is from the 1993 Motorola Linear Interface ICs. Equivalent operating may be used and...
This metronome can use either a high impedance phone or a crystal phone. You can use a small...