Inexpensive and compact lithium battery memory cards based on the TP4056 microcircuit, as well as individual microcircuits, have appeared for sale in online stores. For those who find it difficult to do something similar, but...
Modern digital audio sources (CD players, DACs, etc.) have a very low noise level. Much lower than vinyl or magnetic tape. Due to this noise requirement of the subsequent...
Device for charging UPS batteries I am publishing an article by my reader Alexander, who lives in Alexburg, or more precisely in Riga. The article discusses in detail the principles of operation of batteries, processes...
My favorite mobile phone NOKIA 6500, which was purchased about six months ago, initially did not charge. Repair work was carried out, after which the phone worked for about a month. Main...
Anyone can assemble such a device, even those who are completely far from electronics, you just need to solder all the parts as in the diagram. The metal detector consists of two microcircuits. They don't require any...
The production of hard drives does not stand still. Technologies are actively developing: writing and reading speeds are increasing, service life is increasing, new standards and form factors are emerging, due to...
Pulse metal detectors Koschey-5I and Koschey-5IM Developed in the early 2000s, our pulse metal detectors Koschey-2I, Koschey-4IG have earned a reputation as simple, reliable and inexpensive devices....
A serial or COM port is an RS-232 standard interface that is used to connect various equipment to a computer. Due to the limitation in the size of information (1 bit) transmitted per...
Good afternoon Now we will assemble a low frequency amplifier. The TDA2004 microcircuit is taken as the basis. It has two outputs, but the power of each individually is 8 Watts, which is not so much. That's why we...
A good charger with good output characteristics can be made from old TVs with pulsed power supplies such as MP1, MP3-3, MP403, etc. Minor modification of the unit allows...