摘要 |
The miner's appliance for individual gas protection and illumination in which the first output of the accumulator battery is positive, and the second one is negative, the current-restricting resistor is the transistor, collector of this one is connected to the anode of the diode, and the emitter - to the cathode; at that the base of the transistor is through control circuit with connected in sequence diode and resistor is connected to the positive output of the accumulator battery; besides that the gas signaling unit includes voltage stabilizer, this is with the output connected to the inputs of the methane sensor and re-adjustable divider of support voltage, the outputs of those ones are connected to the inputs of the comparator, the output of this one is through multi-vibrator connected to the input of the emitter repeater with relay, normally closed contacts of this one are connected to the circuit of the lamp headlight power circuit.
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