Tag: sensor

General Purpose Alarm Circuit for Resistive Sensor

When the resistance value of a temperature, light, pressure,  or any other resistive sensors  Rs drops below a certain point  (adjusted by a preset potentiometer),  the SCR (silicon controlled switch) will be triggered. The sensor (Rs) and the potentiometer placement can be interchanged to get opposite action, where the SCR need to be triggered  at the increase of sensing resistor […]

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Category: Control and Monitoring Tags: ,

Remote Sensor System Pre-Amp

Remote sensor might cause a trouble if it’s a passive type, has very low power output, and should be connected with relatively long cables. By supplying a current or voltage source through its connection wire, it’s possible to make long enough wiring without suffering much noise/interference. The following schematic diagram show a circuit consist of LM10 to make a remote […]

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Category: Control and Monitoring Tags: , ,