In this post I will show how 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 […]
Meters and Testers
Simple 1.5 V Inductance Meter Circuit
Here a simplest yet quite accurate inductance meter is presented, which can be built within few minutes. Furthermore, the circuit can be powered-up with a single 1.5V cell. However, a frequency meter would be required to work-out the inductance. Designed and Presented by: Abu-Hafss Using Cross-Coupled NPN BJTs The circuit is pretty straight forward wherein, […]
Shunt Resistor Calculator for Ammeters
Ok so here we have one simple calculator which can help us to calculate the shunt resistor value that we need to connect across a normal ammeter when we want to use that ammeter to measure high current, more than its actual range. So normally, ammeter can measure only small current, like 1 amp or […]
4 Useful Logic Probe Circuits Explored
These simple yet versatile 4 LED logic probe circuits can be used to test digital circuit boards such as CMOS, TTL or similar for troubleshooting the logic functions of the ICs and the associated stage. What is a Logic Probe A logic probe circuit is a handheld electronic tool which can be used to test […]
How to Measure Transformer’s Current Capacity
We can use a shunt resistor and ammeter concept to find out how much maximum current a transformer can give, in other words, we are trying to know the current rating or amp capacity of a transformer. If you do not wish to read the full article below, you can feel free to watch the […]
DSO138: Best Small Oscilloscope for Electronic Hobbyists
An oscilloscope is a device that measures and analyses signals in circuits. It’s an indispensable equipment for everyone who works with electronic circuits since it enables them to see the activity of a wave in real – time basis. The DSO138 is one of the most popular oscilloscopes on the market today. We’ll give a […]