This simple capacitor tester is capable of testing electrolytic capacitors in the range of 1uf to 450uf. It can test large start and run capacitors as well as 1uf miniature capacitors rated at 10v. Once you understand the timing cycle, you can test down to 0.5uf and up to 650uf. By Henry Bowman How to […]
Meters and Testers
How to Make a Simple Milliohm Tester
I wanted a milliohm tester circuit that could be used to measure resistance on printed circuit boards to track down shorted components. I looked at several designs and combined several ideas into this project. By Henry Bowman Simulation and Working Referring to the schematic, the milliohm tester is powered by two 9 volt dry cells. […]
Simple Transformer Winding Tester
This test set is primarily designed to test step-down, step-up transformers, for open and shorted windings. It can determine if the device under test has a low resistance to ac current. It can also measure the dc current resistance in ohms. By Henry Bowman Introduction The test set uses a 16 VAC, 60hz signal to […]
Simple MOSFET Tester and Sorter
This simple MOSFET tester does a quick job of testing both enhanced mode type N and P-channel mosfets. It checks for shorts between gate, drain and source. Designed By: Henry Bowman It also distinguishes between N and P-channel mosfets. Once the connections are correctly made to the mosfet, all testing is done without reversing connections. […]
Simple Transistor Diode Tester
In this post we learn how to make a simple yet efficient transistor/diode tester circuit, that will not only test the quality of a BJT, but will also help to identify whether it is is an NPN or a PNP. The circuit was designed and contributed by Mr. Henry Bowman. Simulation and Working Referring to […]
Make this Advanced Digital Ammeter using Arduino
In this post we are going to construct a digital ammeter using 16 x 2 LCD display and Arduino. We will understand the methodology of measuring current using a shunt resistor and implement a design based on Arduino. The proposed digital ammeter can measure current ranging from 0 to 2 Ampere (absolute maximum) with reasonable […]
Digital Capacitance Meter Using Arduino
In this post we are going to construct a digital capacitance meter circuit using Arduino which can measure capacitance of capacitors ranging from 1 microfarad to 4000 microfarad with reasonable accuracy. By Girish Radhakrishnan Introduction We measure value of the capacitors when the values written on the capacitor’s body is not legible, or to find […]
Make this Tachometer using Arduino for Precise Readings
A tachometer is a device that measures the RPM or angular velocity of a rotating body. It differs from speedometer and odometer as these devices deal with linear or tangential velocity of the body while tachometer a.k.a. “tach” deals with more fundamental the RPM. By Ankit Negi Tachometer is composed of a counter and a […]
Transformerless AC Voltmeter Using Arduino
In this article we learn how to make a transformerless AC voltmeter using Arduino. Making an analog voltmeter is not an easy task as to build one you must have good knowledge of physical quantities like torque, speed; which can be very difficult when it comes to their practical applications. By Ankit Negi But a […]
Simple Continuity Tester using IC 555
In this project we are going to make a simple continuity checker circuit using 555 timer. And what makes this circuit so special is that no transistor is used in it and hence this is indeed the simplest continuity checker. By Ankit Negi We all know the importance of 555 TIMER in electronics. The fact […]
Making a Single Channel Oscilloscope
In this interesting post, we are going to make a simple single channel oscilloscope using Arduino and a personal computer, where the waveforms will be showcased on the PC’s display and frequency and time period of the input waves will be displayed on the 16 x 2 display. By Girish Radhakrishnan Introduction Every electronics enthusiast […]
Frequency Meter Using 16×2 Display – Construction Rxplained
In this article we are going to construct a digital frequency meter using Arduino whose readings will be showcased on a 16×2 LCD display and will have a measuring range from 35 Hz to 1MHz. By Girish Radhakrishnan Introduction Being electronics enthusiast, we all would have come across a point where we need to measure […]
Simple Arduino Digital Ohmmeter
In this post we are going to construct a simple digital ohmmeter circuit using Arduino and 16×2 LCD display. We will also be exploring the other possible circuit ideas using the same concept. By: Girish Radhakrishnan Circuit Objective The motto of this article is not just making an ohm meter to measure the resistance; your […]