Call on the UMS8 chip. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Calls and audio simulators
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On the widespread microcircuit of the UMS8 series, in particular UMS8-08, you can assemble a doorbell based on a subscriber loudspeaker.
If you install a microcircuit on a socket, then you will have the opportunity to check the performance of other microcircuits of the UMS8 series. The diode bridge must be rated for voltages greater than 400 V. Precautions must be taken when installing the device, as it has a transformerless power supply
Publication: cxem.net
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