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Sensor circuit diagrams
April 23, 2010
A voltage window switch is in practice the basic lower window limit of this circuit is roughly 3V and the upper limit is 9V. The window range can be extended by fitting a suitable range [more]
April 23, 2010
This circuit, is basically a resistance sensing window switch, except that the resistor takes the form of an NTC thermistor and the circuit thus responds to temperature. TH1 must have a resistance in the... [more]
April 23, 2010
The opamp is wind as a voltage comparator, with a reference voltage applied to pin 2 and the test voltage applied to pin 3: the relay turns on when the pin 3 voltage exceeds that... [more]
April 23, 2010
The modern mechanic switches are improved concerning of old technology. We need however many times to replacement some old switch or to check currents bigger than the durability of certain switches or simple we need... [more]
April 23, 2010
A simple circuit with which we have the possibility opening and closing the RL1 contacts. [more]
April 14, 2010
Here we have three choices, with which we can make electronic switches that use our touch or pressing (push button). [more]
April 11, 2010
This small thermostat allows you to select the size of its hysteresis. You can set both the temperature at which the relay will energize - and the temperature at which the relay will de-energize. The... [more]
April 11, 2010
These two circuits use Thermistors (Temperature Dependent Resistors). Circuit No.1 energizes the relay when the temperature rises above a preset level. Use it to switch things on when it gets hot. Circuit No.2 energizes the... [more]
April 11, 2010
These two circuits use LDRs (Light Dependent Resistors). Circuit No.1 energizes the relay when the light rises above a preset level. Use it to switch things on at dawn. Circuit No.2 energizes the relay when... [more]
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