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Acoustic Sensor – Circuit Schematic
Acoustic Sensor
The sensitivity of the circuit can be adjusted using potentiometer P1 so that it does not respond to ambient noise levels. Diodes D1 and D2 recitfy the signal a...
Easy LED Photo Sensor Circuit With LM1458 – Circuit Schematic
Easy LED Photo Sensor Circuit With LM1458
This circuit is used J-FET for recieve signal to buffer from LED, About Output voltage, We used IC 1458 or LM1458, while in the dark is about 7 volts and the dr...
Current Loop Light Level Detector – Circuit Schematic
Current Loop Light Level Detector
This circuit is two wire light level detector, we don`t separate wires for power this sensor system and for delivering the output signal. With current loop, we ...
Proximity sensor - Page 2 – Circuit Schematic
Proximity sensor - Page 2
First of all, the circuit is ok, but it`s rather unstable. It varies with temperature, and, for eg, I turned it on and I tune it. Them I switch it...
Temperature Monitors – Circuit Schematic
Temperature Monitors
Using a thermistor in the position shown makes a heat activated sensor. A change in temperature will alter the output of the opamp and energize the relay and li...
Static Electricity / Negative Ion Detectors – Circuit Schematic
Static Electricity / Negative Ion Detectors
the gate terminals sensitivity to changes in voltage. The gate terminal here is left open circuit, connected only to the "probe" this being just a few inches of...
Light/Dark Detectors – Circuit Schematic
Light/Dark Detectors
This handy little circuit can tell the difference between darkness and light, making it very useful for switching on and off signs, porch lights or other things...
Infra-red Level Detectors – Circuit Schematic
Infra-red Level Detectors
This circuit is useful in liquids level or proximity detection. It operates detecting the distance from the target by reflection of an infra-red beam. It can sa...
Capacitive Sensors – Circuit Schematic
Capacitive Sensors
For proper operation, circuit ground must be connected via a small value, high voltage-rating capacitor to one side of the mains supply socket. The "Live" side ...
Muscular Bio-Stimulators – Circuit Schematic
Muscular Bio-Stimulators
The Bio-Stimulator provides muscles` stimulation and invigoration but, mainly, it`s an aid in removing cellulitis. Tape the electrodes to the skin at both ends ...
Seismic detectors – Circuit Schematic
Seismic detectors
The piezoelectric element of a kitchen gas lighter is used in this simple, yet effective seismic detector. The piezo element must be placed vertically, one end ...
Geomagnetic field detectors – Circuit Schematic
Geomagnetic field detectors
This basic oscillator will detect the Earth magnetic field. The ferrite rod and coil are taken from an old Medium Wave receiver and a small magnet is glued at o...
Lightning Detectors – Circuit Schematic
Lightning Detectors
A bright lamp flashes in sychrony with the lightning bolts indicating the proximity and intensity of the storm.....
Simple optical switchs – Circuit Schematic
Simple optical switchs
When the phototransistor is stroken by IR light it conducts and the voltage between the 1Mohm resistor(arbitrary) and the phototrans drops from VCC to lower val...
An Ionisation Chamber Shield for OpenRelief – Circuit Schematic
An Ionisation Chamber Shield for OpenRelief
I was prototyping for the OpenRelief project. Based on a simple ionisation chamber, initial testing used a bank of batteries for the bias power supply and this ...
A Treacle Tin Radiation Detector – Circuit Schematic
A Treacle Tin Radiation Detector
The OpenRelief project is building open, modular information solutions for disaster relief , and as part of which they`re developing a range of network-enable...
High dynamic range CMOS (HDRC) imagers for safety systems – Circuit Schematic
High dynamic range CMOS (HDRC) imagers for safety systems
The first part of this paper describes the high dynamic range CMOS (HDRC ®) imager a special type of CMOS image sensor with logarithmic response. The powerful ...
DDC-Online – Circuit Schematic
DDC-Online
An analog input is a measurable electrical signal with a defined range that is generated by a sensor and received by a controller. The analog input changes cont...
WSH412 Hall Effect Sensor IC With Thermal Lock Protection And Auto Restart Function – Circuit Schematic
WSH412 Hall Effect Sensor IC With Thermal Lock Protection And Auto Restart Function
The XC6119 series is a highly precise, low power consumption voltage detector, manufactured using CMOS and laser trimming technologies. The device includes the ...
Sine Wave Generation Techniques – Circuit Schematic
Sine Wave Generation Techniques
SK1901 is a semiconductor integrated circuit utilizing the Hall effect. It has been so designed as to operate in the alternating magnetic field especially at lo...