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Light activated switch circuit – Circuit Schematic
Light activated switch circuit
A simple light activated switch circuit with diagram and schematic using IC LM 311-wired as a voltage comparator and an LDR that acts as light sensor....
Light Sensor Circuit – Circuit Schematic
Light Sensor Circuit
Ambient Light Sensor Circuit Light sensor circuit, such as the name is a circuit that utilizes the light intensity / beam for the other applications do....
Light Sensitive Switch with LDR 2N2926 – Circuit Schematic
Light Sensitive Switch with LDR 2N2926
This be circuit warn when be become dark, or Light sensitive switch. By use electronics part the base is important , be the transistor 2N2926 and AC128. For....
LM134-LM10 Thermometer/Temperature Sensor – Circuit Schematic
LM134-LM10 Thermometer/Temperature Sensor
Using LM134 and LM10 integrated circuits, we can build a thermometer which has -55 to 150?C sensing range.? The ideal meter for this circuit is a 0-200uA....
Infrared (IR) Proximity Detector – Circuit Schematic
Infrared (IR) Proximity Detector
This is infrared (IR) proximity detector circuit. A matched infrared emitter and detector pair is used in this circuit. The voltage controlled oscillator sectio...
Infrared (IR) Proximity (Distance) Sensor – Circuit Schematic
Infrared (IR) Proximity (Distance) Sensor
The photodiode can be used to detect IR reflected from the object. However, IR produced by the ambient conditions also detected by the photodiode. This IR noise...
Humidity detector circuit – Circuit Schematic
Humidity detector circuit
Humidity detector circuit electronic project using common electronic parts...
Plant Watering Watcher Circuit Schematic – Circuit Schematic
Plant Watering Watcher Circuit Schematic
This circuit is intended to signal when a plant needs water. A LED flashes at a low rate when the ground in the flower-pot is too dry, turning off when the mois...
Beam-break Detector For Camera Shutter or Flash Control – Circuit Schematic
Beam-break Detector For Camera Shutter or Flash Control
The IR detector (IC3) controls an LM 7555 CMOS timer (IC2) which operates in mono stable mode. When the beam is broken, IC2 is triggered and its pin 3 output go...
Heartbeat Sensor (Tranduscer) – Circuit Schematic
Heartbeat Sensor (Tranduscer)
This circuit made from an infrared phototransistor and infrared LED. This transducer works with the principle of light reflection, in this case the light is inf...
Flash Slave Trigger – Circuit Schematic
Flash Slave Trigger
Flash slaves are used when you need to supplement one flash unit with one or several more. This slave trigger simply triggers those other units. It does this by...
Fahrenheit Thermometer Using LM35 Temperature Sensor IC – Circuit Schematic
Fahrenheit Thermometer Using LM35 Temperature Sensor IC
If you have a digital voltmeter, or any voltmeter with millivolt resolution and high input impedance, then you can use this temperature-to-voltage adapter....
Error Compensation Circuit for Pressure Sensor – Circuit Schematic
Error Compensation Circuit for Pressure Sensor
To obtain an accurate pressure value, we must remove the offset errors. There are? many basic circuit designs that is used to remove the offset errors. This....
Easy Pulse: A DIY photoplethysmographic sensor for measuring heart rate. Part 1 - Theory and Schemat – Circuit Schematic
Easy Pulse: A DIY photoplethysmographic sensor for measuring heart rate. Part 1 - Theory and Schemat
When I first built the Heart rate measurement through fingertip project, the infrared LED and photodiode used for finger photoplethysmography were actually from...
EMF Probe Version 2 – Circuit Schematic
EMF Probe Version 2
An electromagnetic field probe designed to detect changing electric and magnetic fields. The probe has switchable gain, a frequency response up to 400kHz and in...
Diode digital thermometer circuit – Circuit Schematic
Diode digital thermometer circuit
This digital thermometer circuit diagram uses a common 1N4148 diode as the temperature sensor. The temperature coefficient of the diode, -2 mV / 0C is expl....
Diode Sensor For Lasers – Circuit Schematic
Diode Sensor For Lasers
Laser-receiver circuits must bias their avalanche photo diodes (APD) to achieve optimal gain. Unfortunately, an APD""s gain depends on the operating temperature...
Digital Thermometer Circuit – Circuit Schematic
Digital Thermometer Circuit
PIC16F84A Digital Thermometer Circuit The digital thermometer circuit is built, almost all by using the temperature sensor of some form of discrete components,....
Digital Remote Thermometer – Circuit Schematic
Digital Remote Thermometer
This circuit is intended for precision centigrade temperature measurement, with a transmitter section converting to frequency the sensor`s output voltage propor...
Digital Compass Module HMC6352 – Circuit Schematic
Digital Compass Module HMC6352
From Figure 1, the host microprocessor (uP) controls the HMC6352 via I2C serial data interface lines for data (SDA) and clock (SCL). Two external 10k-ohm pull-u...