This circuit was found in a Popular Electronics from the 90s. The circuit uses common components today. The waveform of the generated signal is shown next to the diagram.
Molex is using the FFC / FPC Premo-Flex jumpers for inter-board and inter-plate interconnects...
This circuit is suggested by Texas Instruments allowing the modulation of a transmitter from TTL...
This conventional H-bridge current monitor circuit was obtained from a 2005 Linear Technology...