Here is a teardown of cheap mains powered LED night light from LIDL. After few years of use this light became very dim and so useless. I opened it to see what is in it and what was broken. Let’s open it. Circuit board details Here is the circuit diagram. This is quite typical transformerless →
An FPGA Developer’s Guide to Cheap Development Boards https://www.hackster.io/news/an-fpga-developer-s-guide-to-cheap-development-boards-8f1782bb271a Finally, a detailed and all-encompassing guide for those of us with an addiction to buying new FPGA development boards. Joel Williams’ list starts off by outlining the criteria that he looks for in an FPGA development board. He makes the great point to consider what peripherals →
I saw a request for circuit diagram in Facebook electronics group: Hello feds. Required surge protector circuit. Working on 220v. 50hz 10amps load. I first offered this reverse engineering of one commercial mains surge protector “Ahlstrom 23 368″. The manufacturee component codes of the exact components used. S20K250 is a varistor for 250V AC / →
I saw at Facebook a video 12 v Short Circuit Protection and same for 220 volts (https://www.facebook.com/108281974135756/posts/166052965025323/). It was advertised as a short circuit protection relay circuit that will turn off the power when output is short circuited. This seems to be a quite popular circuit idea, because I saw several very similar circuit designs →
This is a story of a a video digitizing circuit I built early 1990′s. It kind of worked, but was not practical then and much less useful nowadays. It is an interesting how simple circuit could be used for converting analogue composite video signal to digital for computer processing. This is the story of Dirt →
I had one DIY laboratory power supply that has served me well for a long time, but there are testes where I need another laboratory power supply. Instead of building a traditional power supply with linear regulator and large heatsink, I went to another route: build one from switch mode power supply and adjustable switch →
An adjustable regulated power supply is a necessary tool for an electronics laboratory. Here is a laboratory power supply 2.7-30V up to 4A I built has worked for 30 years ago and still going strong. Its function is to supply a stable voltage set by the voltage control potentiometer up to the current set by →
You can now add a virtual taste anf smell to a tasteless snack! Meiji University in Japan has developed a taste display that can artificially recreate any flavor by triggering the five different tastes on a user’s tongue. Researchers can also create virtual smells by electrocuting your nose. Electric Chopsticks Add Salty Flavor Where None →
A cable tie (also known as a hose tie, zip tie, or by the brand name Ty-Rap) is a type of fastener, for holding items together, primarily electrical cables or wires. The most common cable tie consists of a flexible nylon tape with an integrated gear rack, and on one end a ratchet within a →
Electronics prototyping is an important part of electronics device development. Prototyping means to build and test an early version of) an electronic circuit. Prototyping your product is all about learning. Each time you create a prototype version you will, or should, learn something new. Start with the most simple, low cost way to prototype your →