In this post I have explained 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. Circuit Operation Referring to […]
Newly Updated Circuit Projects:
Homemade Inductance Meter Circuit
In this article I have explained a simple yet accurate, wide range inductance meter circuit. The design utilizes only transistors as the main active components and a handful of inexpensive passive components. The proposed Inductance meter circuit can measure inductance or coil values accurately over the given ranges and as a bonus the circuit is […]
How to Measure Gain (β) of a BJT
In this post we’ll study a simple opamp circuit design which can be applied for measuring the beta or the forward current gain of a particular BJT in question. What is beta (β) The beta (β) is the forward current gain that every BJT inherently possesses. It determines the efficiency of the particular device in terms […]
Analogue Water Flow Sensor/Meter Circuit – Check Water Flow Rate
In this post I have explained a simple water flow meter/sensor circuit using hall effect sensor and a pulse counter circuit. Referring to the diagram shown below, we can see an arrangement consisting of a circular enclosure having a couple of pipes drilled in and a circular turbine shaped wheel installed inside the enclosure. How […]
Simple Arduino Digital Ohmmeter Circuit
In this post I will show how 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. Circuit Objective The motto of this article is not just making an ohm meter to measure the resistance; your multimeter can […]
High Voltage Meter Circuit [for Measuring 10kV]
In this article I have explained a simple high voltage meter circuit which can be used for measuring extremely high voltages in the order of many 1000s of volts. The circuit can be used to measure high voltages from CDI units, Automobile spark plugs, high voltage generators, mosquito bat circuits, fence chargers, room ionizer circuits […]