Measure Circuits
measurement circuits designs
Measure 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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Ultrasonic beam barrier
Feb 20th
This circuit generates inaudible ultrasound to make a barrier across the entry. At the moment the circuit detects a break in the sound barrier, it generates a loud alarm indicating the entry of a person. This can be used to protects the entry passages and helps to detect unauthorized entry of persons in protected areas (more…)
Temperature Meter
Feb 15th
This temperature meter uses the precision micro power centigrade sensor IC LM35. The output voltage of the IC is linearly equal to +10Mv per degree centigrade. The temperature level is displayed through LED readout.
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…)
Temperature measurement schematic
Jan 18th
The multimeter is a measurement device most used by engineers and we use it in this temperature measurement circuit schematic. The temperature sensor is LM335 wich has a linear characteristic of 10mV / K . In the production process this electronic device is calibrated so can provide 2.73V at 00C. (more…)
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