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Fluid Level Detector Circuit PCB – Circuit Schematic
Fluid Level Detector Circuit PCB
Here is the circuit of a fluid level indicator which shows each level in meaningful English letters. The circuit presented here using seven segment display to d...
Touch Plate Circuit With High Sensitivity PCB – Circuit Schematic
Touch Plate Circuit With High Sensitivity PCB
Here is a high sensitive touch plate circuit using NE555 which turns on a buzzer when anyone touches the metal plate or by hovering his hand over the plate. Fro...
Water Level Indicator With 7-Segment Display PCB – Circuit Schematic
Water Level Indicator With 7-Segment Display PCB
Circuits available for indicating water level is usually consist of LEDs to indicate the liquid level. But this circuit uses a 7-segment LED display instead of ...
Temperature Controller For PC PCB – Circuit Schematic
Temperature Controller For PC PCB
Our computer may often heated up due to long use or the hot climate, temperature controllers are necessary. You need to do a temperature measurement to ensure t...
Schematic Diagram Basic Levitation and Magnetic Levitation Circuit Project – Circuit Schematic
Schematic Diagram Basic Levitation and Magnetic Levitation Circuit Project
This optodetector measures the position of the ball by the amount of light transmitted by the infrared LED. This is a linear signal across the small area of the...
LM56 diagram of Circuit of the Thermostat project – Circuit Schematic
LM56 diagram of Circuit of the Thermostat project
The values of LM56 Thermostat project Circuit diagram of R1, R2 and R3 for the points of travel, VT1 and VT2 can be determined using the subsequent equations. T...
Schematic Diagram LM35 Smart Heater Controller Project – Circuit Schematic
Schematic Diagram LM35 Smart Heater Controller Project
LM35 Smart Heater Controller SchematicMinuscule circuit of the electronic heater controller presented here is built around the renowned 3-Pin Integrated Tempera...
Heat Sensitive Switch – Circuit Schematic
Heat Sensitive Switch
At the heart of this heat-sensitive switch is IC LM35 (IC1), which is a linear temperature sensor and linear temperature-to-voltage converter circuit. The conve...
Schematics Serial Temperature Sensor Data Logger – Circuit Schematic
Schematics Serial Temperature Sensor Data Logger
The program in the microcontroller knows two protocols; the one wire bus used by the DS1820 temperature sensor, and the serial protocol expected by your compute...
Two-Wire Temperature Sensor – Circuit Schematic
Two-Wire Temperature Sensor
Remote temperature measurements have to be linked by some sort of cable to the relevant test instrument. Normally, this is a three-core cable: one core for the ...
Rainwater Storage Gauge – Circuit Schematic
Rainwater Storage Gauge
Not only on ecologically grounds but also economically it makes sense to collect rainwater for use in the garden and increasingly for `grey water` domestic use....
Light Gate With Counter Using 555 And 4033 – Circuit Schematic
Light Gate With Counter Using 555 And 4033
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 ...
Infra-Red Proximity Detector – Circuit Schematic
Infra-Red Proximity Detector
The detector is intended for the recognition of obstructions at distances of a few millimeters to a few centimeters. Similar detectors are used in the industry ...
Electronic Ear for Lego RCX Module – Circuit Schematic
Electronic Ear for Lego RCX Module
One interface that is missing in the Lego MindStorms system is an electronic ear. We don`t mean that the RCX should respond to spoken commands (which requires a...
Celsius Thermometer – Circuit Schematic
Celsius Thermometer
The circuit of the Celsius thermometer in the diagram is based on the well-known Type LM334 from National Semiconductor. This IC is a sensor that provides a cur...
LowCost Spectrum Analyzer – Circuit Schematic
LowCost Spectrum Analyzer
This circuit uses a very simple approach to detecting smoke in the air. Quite simply, it uses a bulb as a light source, and an LDR (Light Dependent Resistor) as...
pseudo track occupancy detector – Circuit Schematic
pseudo track occupancy detector
Track occupancy detectors are needed for hidden yards and other sections of track that are hard to see, but they are also necessary for block operation. The cir...
improved vibrating battery – Circuit Schematic
improved vibrating battery
Many blind and deaf-blind people use portable electronic devices to assist their everyday lives but it is difficult for them to test the batteries used in that ...
heart rate monitor schematics – Circuit Schematic
heart rate monitor schematics
Strictly speaking, this simple circuit shouldn`t work! How could anyone expect an ordinary light dependent resistor photo cell to `see` through a fingertip in n...
afx slot car lap counter – Circuit Schematic
afx slot car lap counter
AFX slot car sets are very enjoyable but you can increase the fun with a lap counter. This circuit will count from 00 to 99, with independent counters for each ...