Suggested by Raytheon in 1967 documentation this circuit uses a lightbulb and LDR optical coupler of the time. The transistor determines the maximum current.
What sets this transmitter apart, which we found in a 1990 documentation, is the modulation by the...
This circuit source a voltage proportional to the number of the input pulses. The circuit has a...
This is the conventional application of a 1 out of 10 decoder with CMOS 4017, as shown in an old...