Controllers & Sensors Circuits
controllers and sensors schematics
Controllers & Sensors circuits - related electronic projects and circuit diagrams (schematics), this helps you finding desired informations and facilitates your site navigation through all articles database.
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Servo Motor Controller
Mar 15th
This is the simple basic design of Servo pulse generator. It uses the CMOS IC 7555 in the Astable mode to generate pulses to drive the servo motor. The circuit can be suitably modified to get pulses of sufficient length.
PC Fan Controller
Jan 30th
This PC fan controller circuit is designed with discrete components and is used to control 12 V fans that have a current consumption lower than 200 mA. With the components values presented in the circuit diagram, the voltage won’t drop below 7 V. If the fan won’t start at 250C then temporarily replace the temperature sensor KTY10 with a 1.8 kΩ resistor and reduce the value of R7. If the PC fan has a speed too high then increase the R7 value. (more…)
Electronic dog whistle
Jan 21st
Need electronic dog whistle? It is widely known that dogs can hear sounds with frequencies higher than the humans cant hear. Sound frequencies higher than 20 kHz can be hardly detected by humans but animals are very sensitive to it. Basing this fact, an electronic dog whistle can be constructed and used to call dogs back from long distances. (more…)
Seismic Sensor
Nov 13th
Here is an ultra sensitive vibration alarm that can sense very minute earth borne vibrations. It can be used to detect vibrations in the earth (Earth quake?). So it is an ideal device to monitor entry passages. The circuit exploits the direct piezo electric property of the piezo element used in buzzers. The Lead Zirconate crystals present in the piezoelement can readily store current and can release the current when the orientations of the crystals are disturbed through mechanical vibrations. IC1 amplifies the signals from the piezo element and the high output from IC1 switches on T1. When T1 conducts, More >
Fuse monitor circuit
Jul 22nd
This circuit monitors a DC fuse. Its LED lights continously when the fuse is intact but blinks is the fuse is broken. The fuse monitor circuit is designed for 12 volts but can be modified for other voltages. To use this circuit for 6 volts, divide all resistance values by two, for 24 volts, double the values. The circuit consumes around 25 mA and most of the current is consumed by the LED. If you decide to use the circuit in battery operated modules, it is highly recommended to use a high efficiency LED and increase the value of R7 More >
Lamp & Fuse Tester
Jun 28th
Why a lamp tester or fuse tester? Testin cables, wires, lamps… belongs to a repair job and sometimes this becomes too cumbersome since one has only two hands and too often, one has to hold the part being tester and the two probes of an ordinary continuity tester all at the same time.
This fuse and lamp tester enables easy testing of lamps and fuses by using the conductivity of the human body. One of the test probes is connected to the part under test while the other probe is hel dby the normal hand. (more…)
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