Author Archives: Administrator

For my video surveillance project I needed special video camera to make video shots in the dark. One local company offered YOKO YK-3B41 or YK-3B43 video cameras. The body, lenses and IR emitting diodes are located in the same box. … Continue reading →

Long time ago all my computer were suffering from low memory. I always remember how my work computer lagged when I loaded bigger application and how that virtual memory was chewing harddisk. Especially when I loaded few programs at same … Continue reading →

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 →