A programmable gain amplifier (PGA) is an electronic amplifier, typically based on an operational amplifier (op amp), whose gain can be changed by external control signals. Recently, I have been thinking about a basic programmable gain amplifier that can be quickly […]
This post explains how to make a simple touchless live wire detector that can be used to find hidden electrical wiring in a wall or ceiling. This battery powered tester is actually a very simple […]
This post is about the far-famed and widely-used 741 classic operational amplifiers! While not attempting to share numerous potential applications, it includes one basic circuit idea that can be tweaked well to applications other than […]
Late month I’d got an order from my neighboring client to build a pulse width modulation to dc voltage converter module that’s compatible with common microcontrollers and PLCs. Since it’s a fussy time for me […]
