While testing some cheapo crash sensor modules recently, I was quite disappointed with the noisy and dirty output signals they provided. So, I got into the thoughts of restyling hardware debounce circuits suitable for contacts, […]
The LM385 is a micropower two–terminal bandgap voltage regulator diode. It is designed to operate over a wide current range of 10mA to20 mA, and features exceptionally low dynamic impedance, low noise and stable operation […]
Sometimes you may need ready-made hardware to set up a simple timer to help you control something at the right time. No wonder, Chinese electronics have many instant solutions for that, the simplest of which […]
If you often drive early in the morning or at night, you spend most of your time in a dark vehicle, and at that time a small interior/dome/cabin light becomes an indispensable widget if you […]
A while back, I came across a set of multichannel optocoupler modules at a discount sale, and what immediately caught my attention was the PC817 dual-channel optocoupler module in that collection. So, this post is […]
Recently, I wanted to try an electronic scarecrow in my lab window to scare off some birds (often nocturnal) that make a lot of noise and dirt. Although there are many options for building one, […]
What is the point in critiquing a cheap Chinese power MOSFET module, you might ask. But I have a reason for that, because learning something useful from other people’s mistakes (even if they are trivial) […]
As Wikipedia says, a ceramic resonator is an electronic component consisting of a piece of a piezoelectric ceramic material with two or three metal electrodes attached. Like the similar quartz crystal, when connected in an […]
Self-lock delay switch is a simple timer module that produces a fixed square pulse. It is designed around the 555 timer and uses a tricky negative edge trigger to ‘run and lock’ the timer. The […]
Inspired by a dazzling Chinese design, I started thinking about making my own bicolor LED waistband with a few components lying around my workbench. In this post, you can see the basic design concept of […]
