Medicinal automatic timing erythrocyte sedimentation rate shelf

Published:2011/6/24 8:17:00 Author:Nicole | Keyword: automatic timing, erythrocyte sedimentation rate, shelf | From:SeekIC

This medicinal automatic timing erythrocyte sedimentation rate shelf circuit is composed of power supply circuit, sound alarming circuit and timing circuit, it is shown in the figure 9-158. The power supply circuit is made of power supply switch SO, power supply transformer T, rectifier quad UR, filter capacitor C13, C14 and three terminal regulator integrated circuit IC1. The sound alarming circuit consists of transistors V1, V2, resistor R5, capacitor C13 and loudspeaker BL. The 220V voltage is pressure released by T, it is rectificated by UR, it is filtered by C14, it is regulated voltage by IC1, one path provides IC2-IC4 with +12V work voltage, after divided voltage by R1, R2, the other path provides N1-N12's phase reversal input terminal with reference voltage.



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