The gas limiting alarm mining lamp circuit diagram 2

Published:2011/7/14 20:40:00 Author:Lucas | Keyword: Gas limiting , alarm , miners lamp | From:SeekIC

The gas limiting alarm miner's lamp circuit is composed of the gas detection circuit, controlled oscillator circuit and lighting circuit, and the circuit is shown as the chart. Gas detection circuit is composed of the gas sensor, resistor R1 and potentiometer RP. Controlled oscillator circuit is composed of the potentiometer RP, diode VD, transistors V1 ~ V3, resistors R2 and R3, capacitors C1 and C2 and the relay K. Lighting circuit is composed of the battery GB, light EL, light switch S and the normally closed contact of K. The miner's lamp EL is lit by turning on the light switch S, . R1 ~ R3 select 1/4W metal film resistors. RP uses small synthetic carbon potentiometer or variable resistor. C1 and C2 select aluminium electrolytic capacitors with the voltage in 6.3V.



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