EXPANDED SCALE DC VOLTMETER
When using an analog meter to set the output of a power supply used for testing 12-volt equipment, an expanded voltmeter scale has a decided advantage and accur...
Fishermans Dipper
With the active operation a measuring resonant circuit (program under test) is coupled loosely at the resonant circuit of the dippers, i. e. brought in its prox...
Build A Digital Tachometer/RPM Counter Circuit
The circuit for the Digital Tachometer/RPM Counter tutorial consists of only a few devices. Wire them up according to the following circuit diagram. The PIC I`m...
DS-300 Lap Counter with Optical Interface
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Electric Field Mill Fabrication
This page describes the construction of an electric field mill. This is a device to measure the electric field strength on earth due to the static electric fiel...
Power Quality In Electrical Systems
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LM2917 frequency to voltage converter
This circuit uses an LM2917 frequency to voltage converter. The input was connected to the low voltage side of the ignition coil, and the various components aro...
Coil Winding machine counter with Atmega8 and Reed relay
Using an Atmega8-8PU (configured for 8MHz with external crystal), a Nokia 5110 lcd, and a transistor to handle the pulses from a reed relay. A 3. 3V regulator p...
DIY/Homemade Radiation Geiger Dosimeter
An efficient, stable, easy to build construction for all your radiation dosimetry needs. I started from scratch, designing a complete dosimeter unit around the ...
Electrocardiagram (ECG / EKG) for DrDAQ Data Logger
An electrocardiogram or ECG (also known as EKG ” abbreviated from the German word Elektro-Kardiographie), is an electrical recording of the heart and is used ...
Frequency Counter PIC 16F84
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Simple bike computer tutorial
The PCB we have made is big and has plenty of space for cutting and adding other bits and pieces. But if we want the final satisfaction of seeing it working, mo...
Circuit explanation of Ultrasonic Range Meter unit
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Circuit explanation for Ultrasonic Range Meter
The ultrasonic signal which was received with the reception sensor is amplified by 1000 times(60dB) of voltage with the operational amplifier with two stages. I...
EAGLE Ultrasonic Range Meter
The oscillation circuit of the transmitter was added. An oscillation circuit by 555 IC is used for a modified circuit. This is to adjust an oscillation frequenc...
LCS-1M - A Low-Cost Hobby Oscilloscope
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Data Recorder
The Data Recorder (A3007) is a LWDAQ Device that decodes and recordes subcutaneous transmitter ( SCT ) messagess. The A3007 takes the signal generated by a demo...
PC based frequency meter
The simple circuit offers no isolation, but the simplicity of the circuit combined with cost of sound cards and the fact that diodes 1 and 2 add a good measure ...
Real-Time Energy Monitor with Arduino and LabVIEW
The system consists of two parts: the Arduino board that detects the led pulses and sends the data via the XBee module, and a PC that recive the data through a ...
meter circuits
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