The reporting timing contact printer circuit

Published:2011/8/15 22:15:00 Author: | Keyword: contact printer | From:SeekIC

In the circuit, A1 and A2 are the timers; A3 and A4 are the second signal generators; A5 and A6 are the sound signal generator. At the input terminal of A1, the R and C time delay net is connected there, by changing the value of R, the time constants of R and C are changed, i.e the time of A1 input terminal LEV rising from low to transfer potential is changed. The oscillating frequency of A3 and A4 is 1Hz, the frequency of A5 and A6 is 1000Hz or so. In the circuit, K1 is the power supply switch; k2 is the in-out converting switch; K3 is the focus switch; K4 is the jogging switch; K6 is the 10*10 selecting switch.



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