Inductivity Meter Using IC 555
The aim of the project is to build simple low cost inductance meter. The main parts of the project are IC 555, Transistor, resistor and capacitor.....
Digital Alarm Speedometer Circuit
This Digital Alarm Speedometer Circuit. It allows us to appraise the acceleration of any article moving, abnormally cars and added vehicles. The acceleration is...
Voltmeter with LED for car battery PCB
The circuit, is a comparator, can measure with step of 1Volt, the voltage of battery of car. The clue of voltage become after comparison of voltage of battery, ...
TV Relative Signal Strength Meter PCB
Circuit This circuit was designed to assist the installation of TV antennas. The signal is monitored using a small portable TV set and this circuit monitors the...
LED Volt Meter Circuit LM324
It`s a very useful circuit which when installed on your car gives the voltage of you car battery in a LED dot display form. The meter circuit is based on four c...
Electronic Thermometer Circuit
There are plenty of digital thermometers with ·1 C displays but the accuracy is about + 1 C and you can not calibrate them. I made this thermometer circuit fro...
Time Domain Reflectometer (TDR)
This Time Domain Reflectometer (TDR) based on circuit idea published in Electronics Design October 1, 1998 magazine. Time Domain Reflectometer modified version ...
Grid DIP Meter
This circuit was developed by Luigi Falcone, I1FLC. He uses seven plug in coils covering 3. 0 to 30Mhz in a Colpitts oscillator circuit. The coaxial socket J2 p...
Capacitance Meter
The common 555 timer IC forms the heart of the circuit. Its function is to charge the unknown capacitor (Cx) to a fixed voltage. The capacitor is then discharge...
Basic Multimeter
A number of shunts and multipliers selected by a switch can be used in association with a single basic meter to form a multirange instrument, known as a multime...
Basic Multimeter Circuit
A number of shunts and multipliers selected by a switch can be used in association with a single basic meter to form a multirange instrument, known as a multime...
A Noise Meter Circuit::: save ears PCB
Circuit Hello HELLO! Are you deaf Do you have disco ears ` If people ask you this and you`re still well below 80, you may be suffering from hearing loss, which...
Decibels Meter Circuit Using LM324
This decibels meter circuit responds for sound pressure levels from about 60-70 dB(Decibels). That sound is picked up by an 8 ohm speaker, amplified with a tran...
Build Your Own Gauss Meter
Have you ever wanted to find out how strong a magnet really was, or how the strength of the magnetic field varied as you changed the distance from the magnet or...
Wire Tracer (Transmitter)
The circuit depicted here forms one half of a device that will prove extremely handy when tracing the path of electrical wiring in a building or to locate a bre...
Wire Tracer (Receiver)
The circuit depicted is the receiver device of a transmitter/receiver combination that will prove extremely handy when tracing the path of electrical wiring in ...
Digital Main Voltage Indicator
Continuous monitoring of the mains voltage is required in many applications such as manual voltage stabilisers and motor pumps. An analogue voltmeter, though ch...
Schematics Digital Blood Pressure Meter
This Digital Circuit describes a Digital Blood Pressure Meter concept which uses an integrated pressure sensor, analog signal-conditioning circuitry, microcontr...
Thyristor Tester
The circuit in the diagram is a very handy tool for rapidly checking all kinds of thyristor (SCR, triac, ). In case of a triac, all four quadrants are tested, w...
Three-State Continuity Tester
The continuity tester can distinguish between high-, medium-, and low-resistance connections. When there is a conductance between the inputs, which are linked t...