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light gate with counter – Circuit Schematic
light gate with counter
The circuit described here counts the number of times that an infrared beam is interrupted. It could be used to count the number of people entering a room, for ...
infrared emitter and detector using ic 74ls14 – Circuit Schematic
infrared emitter and detector using ic 74ls14
This circuit have applied to line detection of robot project, Good match between the transmitter and the detector is important for proper operation, especially ...
light sensor with twilight detection – Circuit Schematic
light sensor with twilight detection
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touch free timer switch circuit – Circuit Schematic
touch free timer switch circuit
This type of infrared proximity circuit is widely used as an electric switch where physical contact is not desired for hygiene purpose. For example, we commonly...
line following robot sensor – Circuit Schematic
line following robot sensor
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IR-Link Temperature Sensor Allows Isolation of the Temp Sensor – Circuit Schematic
IR-Link Temperature Sensor Allows Isolation of the Temp Sensor
A circuit is described that transmits temperature data over an IR link. This allows isolation of the temperature sensor.....
Driving Strain-Gauge Bridge Sensors with Signal-Conditioning ICs – Circuit Schematic
Driving Strain-Gauge Bridge Sensors with Signal-Conditioning ICs
Strain-gauge sensors transduce (convert) strain into an electrical signal for use in pressure sensors, weight measurements, force and torque measurements, and m...
Gamma-Photon Radiation Detector – Circuit Schematic
Gamma-Photon Radiation Detector
A PIN photodiode, four low-noise op amps and a comparator are used to detect individual photons of gamma radiation. The schematic, design considerations and com...
Proportional Control – Circuit Schematic
Proportional Control
Manufacturer of Thermoelectric Materials, Custom Thermoelectric Coolers and Value-Added Thermal Assemblies.....
Touch Screen Model – Circuit Schematic
Touch Screen Model
The challenge of this project is to create a model of a capacitive touch screen, including physical modeling of a user`s finger, the touch screen materials, and...
Pulsed-light sensor – Circuit Schematic
Pulsed-light sensor
If you don`t have an audio detector already constructed, you can use a nice set of audio headphones (closed-cup style, that completely covers your ears) and a 1...
Using LED As A Light Sensor – Circuit Schematic
Using LED As A Light Sensor
This circuit shows how to use an ordinary LED as a light sensor. It makes use of the photovoltaic voltage developed across the LED when it is exposed to light. ...
Transcutaneous Electrical Nerve Stimulator (TENS) – Circuit Schematic
Transcutaneous Electrical Nerve Stimulator (TENS)
A Transcutaneous Electrical Nerve Stimulation (TENS) device is, put bluntly, a machine for giving electric shocks. The author was prescribed such a device on lo...
Temperature-Controlled Soldering Iron – Circuit Schematic
Temperature-Controlled Soldering Iron
One reason why commercial soldering stations are expensive is that, in general, they require the use of soldering irons with inbuilt temperature sensors, such a...
Super Light Sensor – Circuit Schematic
Super Light Sensor
This "Super Light Sensor" responds to minute fluctuations in light level, auto-adjusting over the range from about 200 lux up to 60, 000 lux (ie, from a modestl...
Simple One-Wire Touch Detector – Circuit Schematic
Simple One-Wire Touch Detector
This simple circuit can be used to activate whatever you like, for example, by connecting it to microcontroller, relays, secret alarms, robot applications or ju...
Simple Moisture Detector – Circuit Schematic
Simple Moisture Detector
The function of this circuit is to sound a buzzer, or, optionally, actuate a relay, when a certain moisture level is detected between a pair of probes. The circ...
Salt TasterCircuit – Circuit Schematic
Salt TasterCircuit
This circuit was designed to detect the approximate percentage of salt contained in a liquid. After careful setting it can be useful to persons needing a quick,...
Pump Controller For Solar Hot Water System – Circuit Schematic
Pump Controller For Solar Hot Water System
This circuit optimises the operation of a solar hot water system. When the water in the solar collector is hotter than the storage tank, the pump runs. The circ...
Invisible Broken Wire Detector – Circuit Schematic
Invisible Broken Wire Detector
Portable loads such as video cameras, halogen flood lights, electrical irons, hand drillers, grinders, and cutters are powered by connecting long 2- or 3-core c...