Nexpensive, compact counter for measuring milliseconds. Each count is started and stopped by a signal at the input sockets. The device is automatically reset to zero each time it is restarted.
Fiber Optics Voice and Data Kit, fiber optics communications, Transmit your voice or a 1kHz signal through the fiber optic cable to a fiber optic receiver, components: including PC boards; microphone; speaker and fiber optic cable, with Transmitter and receiver