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Magnetic Field Meter Magnetometer Circuit – Circuit Schematic
Magnetic Field Meter Magnetometer Circuit
Some experts` think that SMFs may affect the physical well-being of people. If you believe that these experts are right, the magnetic-field meter described will...
RF Decibel Meter Circuit – Circuit Schematic
RF Decibel Meter Circuit
An DIY RF decibel (or power) meter is an indispensable instrument in any radio workshop. Unfortunately, accurate, wideband models are fairly expensive, and.....
AC/DC Microammeter Circuit – Circuit Schematic
AC/DC Microammeter Circuit
This is a take-off on Mr. Marian s ""Simple Micro Ampere Meter Circuit"" that utilizes active circuitry and an analog meter to make sensitive DC current meas.....
Sound Level Meter Circuit – Circuit Schematic
Sound Level Meter Circuit
This sound level meter circuit can be used to control the intensity of a sound recording or in a disco. It has 5 measurement domains between 70 and 120 dB;.....
LC Meter Circuit Coil Capacitor Meter – Circuit Schematic
LC Meter Circuit Coil Capacitor Meter
This LC meter circuit can measure coils and capacitors. When Lx or Cx is connected in the circuit the oscillator frequency will decrease and this decrease is me...
Network RJ45 Cable Tester Circuit – Circuit Schematic
Network RJ45 Cable Tester Circuit
This is a multifunction RJ45 network cable tester. It is the design of the network cable (RJ45) test, and telephone (RJ11). It is cheap and easy to use. It work...
LED VoltMeter Circuit – Circuit Schematic
LED VoltMeter Circuit
A Simple LED Voltmeter to Monitor the charge level in Lead Acid Battery or Tubular battery. The terminal voltage of the battery is indicated through a four leve...
LCD Liquid Crystal Display – Circuit Schematic
LCD Liquid Crystal Display
An LCD basically consists of two glass plates with some liquid crystal material between them. The LCD has an electrically controlled light polarising liqui.....
Digital Bike Tachometer Circuit – Circuit Schematic
Digital Bike Tachometer Circuit
This digital DIY tachometer for bikes uses two reed switches to get the speed information of the bicycle. The reed switches are installed near the rim of the wh...
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/°C is ex.....
PIC16F88 SWR Meter – Circuit Schematic
PIC16F88 SWR Meter
SWR or standing wave ratio is the ratio of the amplitude of a partial standing wave at an antinode (maximum) to the amplitude at an adjacent node (minimum).....
Capacitor Meter Circuit – Circuit Schematic
Capacitor Meter Circuit
Circuit consists of an oscillator with variable frequency, a divided frequency and measurement stage. The Oscillator is based on a inversor from a 74HC14 and ge...
TV To Scope Converter – Circuit Schematic
TV To Scope Converter
This project takes after the VGA-to-Scope converter by using composite video rather than VGA signals to create a display on an oscilloscope. The circuitry in th...
Ultra-Simple Oscilloscope – Circuit Schematic
Ultra-Simple Oscilloscope
Simple homemade oscilloscopes are not all that difficult to design and build. I have studied various designs dating back to the thirties and had an interest in ...
Oscilloscope Clocks – Circuit Schematic
Oscilloscope Clocks
This oscilloscope clock project uses a PIC 16F876 and a DAC to generate X and Y signals to draw a clock on the oscilloscope. The original circuit and software w...
Digital AC Voltmeter – Circuit Schematic
Digital AC Voltmeter
It started out as a simple unenclosed variac (variable autotransformer) and electrical outlet mounted on a block of wood. I eventually put it in the case of wha...
Capacitance-circuits – Circuit Schematic
Capacitance-circuits
Gadget Master brings you the latest news on capacitance-circuits in our round-up of capacitance-circuits projects and websites for electronics designers, scient...
Sensitive voltage detector – Circuit Schematic
Sensitive voltage detector
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High-impedance voltmeter Analog Integrated Circuits – Circuit Schematic
High-impedance voltmeter Analog Integrated Circuits
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Phase shift AC Circuits – Circuit Schematic
Phase shift AC Circuits
Build the circuit and measure voltage drops across each component with an AC voltmeter. Measure total (supply) voltage with the same voltmeter. You will discove...