Advertisement
Light Dark Sensor With Relay Circuit Using LM741 – Circuit Schematic
Light Dark Sensor With Relay Circuit Using LM741
Above is a schematic diagram of an LM741 light/dark sensor circuit (from the excellent 741 Op-Amp Tutorial by Tony van Roon).The ECG128/NTE128 transistor stipul...
Water Level Controller – Circuit Schematic
Water Level Controller
This is one of mine projects which can be helpful for controlling water level in water tank. I made it on one of Atarado SMART prototyping PCB for which I can t...
Biosensor circuit – Circuit Schematic
Biosensor circuit
This week was spent completing a number of different objectives. Firstly, the software was downloaded to design the schematic for the circuit to be translated o...
BC548 Heat Sensor Diagram Circuit – Circuit Schematic
BC548 Heat Sensor Diagram Circuit
Heat sensor circuit can be used to control any device using heat sensor. In this circuit a thermistor and a resistance is connected in series. This arrangement ...
Fast Optical Recording Circuit – Circuit Schematic
Fast Optical Recording Circuit
This document presents technical details, hardware and software of a complete imaging system which uses a fast CCD sensor and a 41 Msample/s A/D converter to ac...
Plate Touch Sensor Circuit – Circuit Schematic
Plate Touch Sensor Circuit
This system operates on the principle that capacitance loading of an oscillator will lower its frequency. When a foreign body comes into contact with touch pla...
Bridging Touch Plate Sensor Circuit – Circuit Schematic
Bridging Touch Plate Sensor Circuit
In This circuit, two 567 tone decoders are used. One is an oscillator, the other is a detector. Bridging TP1 and TP2 causes U2 to receive Ul`s signal, which ca...
Electronic Thermostat Circuit – Circuit Schematic
Electronic Thermostat Circuit
A diode, such as a IN4148, has a typical -2m V/C temperature coefficient at a 1 mA diode current. Ql and Q2 form a constant current source. D1 is the temperatu...
Temperature Sensor Circuit – Circuit Schematic
Temperature Sensor Circuit
The LM35 temperature sensor provides an output of 10 mV/C for every degree Celsius over 0C. At 20C the output voltage is 20 10 = 200 mV. The circuit consumes ...
Hook Sensor Loop Circuit – Circuit Schematic
Hook Sensor Loop Circuit
Here`s an effective for a temperature sensor to receive power from a 4-to-20 mA loop without actually affecting the loop current (see the figure). This particu...
Thermometer For 5V Operation Circuit – Circuit Schematic
Thermometer For 5V Operation Circuit
At the heart of this simple circuit is the well-known type KTY10 temperature sensor from Siemens. This silicon sensor is essentially a temperature-dependent re...
Whistle Switch Circuit – Circuit Schematic
Whistle Switch Circuit
At the heart of the whistle swatch are a pair of tone detectors, each of which is built around an LM567 tone decoder, which are supported by a minimum of addit...
Sensor-Activated Relay Pulser Circuit – Circuit Schematic
Sensor-Activated Relay Pulser Circuit
A sensor turns on Ql to activate the low-frequency 555 oscillator, which pulses LAMP II. Sensor may be sensitive to changes in light or temperature. Either RA ...
Simple Safety Circuit Circuit – Circuit Schematic
Simple Safety Circuit Circuit
The simple two-hand safety-control switch shown here is little more than two pushbutton switches connected in series;...
Photomultiplier Circuit Circuit – Circuit Schematic
Photomultiplier Circuit Circuit
This circuit is typical of the way that a photomultiplier tube is used. The circuit shown is ac coupled, but if dc coupling is needed, the capacitor can be omi...
Enlarger Exposure Meter Circuit – Circuit Schematic
Enlarger Exposure Meter Circuit
Two gates of a 4011 arc used as a comparator. When the resistance of R4 decreases the voltage at pin 1 and 2 increases, producing a logic zero at pin 3, causin...
Variable-Sensitivity Phototransistor Circuit Circuit – Circuit Schematic
Variable-Sensitivity Phototransistor Circuit Circuit
A variable resistor is used to vary the light-level response of a phototransistor. Phototransistors are more light sensitive than photodiodes, ...
Optoisolator And Optocoupler Interface circuits – Circuit Schematic
Optoisolator And Optocoupler Interface circuits
A circuit for isolating a variable resistor is shown. An optoisolator that has an LED arid a photo-conductive cell (or photoresistor) is used. The current thro...
Optical Proximity Detector Circuit – Circuit Schematic
Optical Proximity Detector Circuit
A reflector isolator (A) detects the presence ol`an object by bouncing light off of it....
Microwave Motion Detector Circuit – Circuit Schematic
Microwave Motion Detector Circuit
Operating at around 1.1 GHz, the detector senses field disturbance in the neighborhood of the antenna. The Doppler signal from detector D1 is amplified and dri...