An optocoupler, simply put, is a little device consisting of an independently-powered light transmitter and light receiver unit packed inside a light-proof shell that can be optically coupled together. Actually optocouplers are very easy to […]
The real inspiration for this post actually came from lots of lame designs seen on the web. The last drop was a reasonably great written article presenting a number of blueprints to build timer circuits […]
Do you know? You can govern the speed of brushed DC motors without any additional sensors, but using a basic characteristic – the speed-dependent back EMF (BEMF) voltage! The BEMF motion control technique has been […]
A common application for electronic timers is to turn electrical devices on/off until a predetermined time, a task that can easily be implemented with ubiquitous microcontrollers like the Arduino! Usually that time period starts from […]
You do not need to read this post if you are willing to thoughtlessly throw away your hard-earned money to buy a car power probe that only has very cheap electronic circuitry inside. On the […]
As promised, here is another fun BBC micro:bit project for your lovely kids. This time, get ready to make a dark-activated LED badge for them and enjoy! By now hopefully you have already gone through […]
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 […]
Now get ready to make your own safe car power socket using inexpensive components that are generally available. The simple device can then be used as a safe accessory power outlet to extend the 12VDC […]
Nowadays, there are various types of switches available to help you track whether your door is open or closed. Such a door status monitor switch changes its states when the door is opened or closed. […]
As mentioned in my previous post, some analog multimeters offer the hFE test feature via a custom-made hFE connector that is usually sold as an optional accessory. The popular Sanwa YX-361TR analog multimeter is a […]
