Category Archives: Anything

In one company, the security situation is awful and we decided to install security video and record everything. As the facility is quite complicated, we squeezed only to 8 video cameras. In Lithuania you can buy various video in devices, … Continue reading →

As local sale of tubes is not satisfactory for me, I decided to build new, full, power amplifier from scraps and surplus components. It will we classic tube amp with double tubes on the output. Why this type? Because it … Continue reading →

Few years ago, our major internet provider offered NOKIA DSL modems for end users. It was Nokia NP5121. It is very durable hardware. I know few places were such modem is working without any problem for six years. This DSL … Continue reading →

If you need simple regulated power supply, you can build it using typical old chip LM317 (LM117). Here is the abstract from datasheet: The LM317/117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A … Continue reading →

This blog entry is for beginners. Sometimes I receive letter with questions from beginners. So, the question: how to build very simple voltage regulator? For fixed (3.3, 5, 6, 12, 15V) or adjusted output. The simples way is to use … Continue reading →

LC meter based on LM311 and PIC16F84 micro controller. 0.0pF – 1uF and 0.0uH – 0.5H range. Quite precise meter. My Machtech tester is capable of metering the capacitors, but is very complicated to measure short lead capacitors, not speaking … Continue reading →

Lithuanian only blog entry. Abstract: I decided to change front fenders for my car. As they are not original, I needed to try if they fit to the car. So one weekend was committed for car repair. All you need … Continue reading →

The beginning was the damaged battery from my old video camera. The old battery for it was made from 6 (six!) NiMH cells. The cells were worn out and didn’t hold too much charge. Full loaded battery was emptied in … Continue reading →

I was testing radio link in our city and with mine country house. The testing transceiver was Kenwood TK-760G-1. I am a bit disappointed with the quality of radio link. The frequency of radio is about 132? ~ 174 MHz. … Continue reading →