Learn and build electronic circuits
In this article I am going to share my journey of building a combined circuit module that functions as both a digital voltmeter and a digital ammeter. This nifty little device is designed for measuring DC volts and current across various ranges all in a digital format. Introduction So let us dive into the world … Read more
New hobbyists may find it interesting to try the following DIY multimeter circuits as their next electronic project, as they require a multimeter for testing and debugging electronic project circuits. How to Use Opamp 741 The following section discusses a few opamp-based meter circuits that use the IC 741 plus a few additional passive parts, … Read more
The construction of an RTD temperature meter circuit is covered in this post, along with information on various RTDs and how they operate mathematically. What’s an RTD When exposed to heat, the resistance of the sensor metal changes or increases, which is how an RTD, or resistance temperature detector, operates. A precise determination of the … Read more
This post discusses a few straightforward yet reliable BJT transistor tester circuits that may be utilized to determine if a transistor is good or faulty. Simple Good or Not good Transistor Tester Is your junk drawer filled with an odd assortment of obsolete BJTs? This simple tiny transistor checker circuit lets you know what to keep and … Read more
In this we post we discuss an accurate continuity tester circuit whose measuring capacity could be adjusted depending on the resistance range of the load under test. The range of the continuity tester could be set from a minimum resistance between the test probes to a maximum of 50 ohm test, the output being indicated … Read more
The proposed LED sound level meter will detect the sound hitting the MIC, and indicate its volume level through an array of LED, connected as a bar graph. Circuit Description From the figure below, you can see the Sound Level Meter. Audible tone is detected by MIC1 (an electret microphone element) and is delivered to … Read more