Testing circuit of moving objects along production line conveyer belt

Published:2011/4/14 21:10:00 Author:Nicole | Keyword: moving object, production line, conveyer belt | From:SeekIC

It is a typical industry application circuit, it can test the small components in conveyer belt reliably and fast. Because of the distance, and it needs long-term reliability, so LED works with pulse, it needs fast response so we should use phototransistor detector, high-low impedance power supply will provide this detector with bias. Pulse working adopts cheap plastic obstruction model. Program control unijunction transistor oscillator is the cheapest pulse generator, it is used to inspire governor's and coupler's LED. A common emitter input amplifier supply low impedance to governor phototransistor. Three transistors play a role of amplifying. Amplifier output is tested by PC1, when governor light load is not cut off, PC1 output is negative. Two transistors buffer amplifier then it produces delay output, to supply to 5V logic circuit.



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