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The gas limiting alarm mining lamp circuit diagram 3

2016-08-07 13:10  
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The gas limiting alarm mining lamp circuit diagram 3
The gas limiting alarm miner's lamp circuit is composed of the gas detection circuit, electronic switch circuit and audio alarm circuit, and the circuit is shown as the chart. The gas detection circuit is composed of the resistor R1, potentiometer RP and gas sensor. Electronic switch circuit is composed of the thyristor VT and RP. Audio alarm sound is composed of the integrated circuit IC, resistor R2, transistor Ⅴ and speaker BL. R1 and R2 use 1/4W carbon film resistors or metal film resistors. C selects select aluminium electrolytic capacitors with the voltage in 6.3V. V uses 59013 or 3DG12 NPN silicon transistor. VT uses MCR100-6 or BTl69 thyristor.