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Auto heat limiter for soldering iron circuit – Circuit Schematic
Auto heat limiter for soldering iron circuit
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USB Thermometer – Circuit Schematic
USB Thermometer
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IR Harp – Circuit Schematic
IR Harp
A harp without strings i. e. IR sensor-receiver pairs function as strings in our device. The device senses when a string is being plucked (causes blockage of IR...
using tept5600 ambient light sensor – Circuit Schematic
using tept5600 ambient light sensor
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Solar Tracker circuit schematic – Circuit Schematic
Solar Tracker circuit schematic
Licensing This file is copyrighted. The individual who uploaded this work and first used it in Licensing This file is copyrighted. The individual who uploaded ...
40khz laser burst detector – Circuit Schematic
40khz laser burst detector
This circuit was originally designed to detect weak flashed of laser light bounced off of a fabric video projection screen. It was used as part of a firearm tra...
induction receiver – Circuit Schematic
induction receiver
The induction receiver shown below is very sensitive and can serve a variety of purposes. It is excellent for tracing wiring behind walls, receiving audio from ...
light dark sensor with relay circuit – Circuit Schematic
light dark sensor with relay circuit
We have modified the schematic diagram above with the addition of a 220uF smoothing capacitor between the base of transistor Q1 and ground. Without this capacit...
ph electrode circuit – Circuit Schematic
ph electrode circuit
A pH electrode measures hydrogen ion (H+) activity and produces an electrical potential or voltage. The operation of the pH electrode is based on the principle ...
lcd thermometer circuit with lm35 – Circuit Schematic
lcd thermometer circuit with lm35
The LM35 of National Semiconductors that is used in this project is a precision centigrade temperature sensor, which has an analog output voltage. It has a rang...
electronic liquid detector circuit – Circuit Schematic
electronic liquid detector circuit
This electronic liquid detector circuit diagram is based on the ULN2429A monolithic bipolar integrated circuit designed for detecting the absence or presence of...
electrocardiogram ecg project – Circuit Schematic
electrocardiogram ecg project
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ultrasonic switch – Circuit Schematic
ultrasonic switch
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accelerometer amplifier circuit – Circuit Schematic
accelerometer amplifier circuit
This is a circuit for accelerometer amplifier. This is a simple circuit. Precision accelerometer needs inverting mode amplifier since they are usually charge-ou...
car parking aid sensor – Circuit Schematic
car parking aid sensor
This Sensor circuit was designed as an aid in parking the car near the garage wall when backing up. LED D7 illuminates when bumper-wall distance is about 20 cm....
basic cds photocell detector – Circuit Schematic
basic cds photocell detector
This is a Basic Cadmium Sulfide (Cds) Photocell Detector circuit. In this circuit, when the light falling on the photocell (PC 1) is blocked, its resistance wil...
mass air flow maf sensor circuit – Circuit Schematic
mass air flow maf sensor circuit
This is a design circuit for mass air flow sensor circuit. The mass air flow sensors converts the amount of air drawn into the engine into a voltage signal. The...
thermometer – Circuit Schematic
thermometer
With the easy availability of inexpensive digital multimeters, and integrated circuit temperature sensors, it is now very easy to build a sensitive and accurate...
linearizing circuit for thermocouples – Circuit Schematic
linearizing circuit for thermocouples
This circuit changes the gain of opamp U1B in four steps or segments. It can be used to get a linear output from most transducers to 1% levels. U1A is a amplify...
smoke detector circuit using ldr – Circuit Schematic
smoke detector circuit using ldr
When there is no smoke the light from the bulb will be directly falling on the LDR. The LDR resistance will be low and so the voltage across it (below. 6V). The...