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 […]
The hFE socket on most cheap digital multimeters provides a dc gain value (often simply pointed as β) useful for evaluating small signal silicon transistors. However, only a few multimeters with the quick NPN/PNP transistor […]
This post explains how to build a Hyper LED Switch using a set of simple and inexpensive electronics components that are available everywhere, you can even find them in your junk box. So, what is […]
Once again, the design concept of an Eternal LED Blinker configured to operate from a DC supply in the 3V to 12V range and consisting of only a few components. Since its power consumption is […]
