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 uses lots of tubes and I have transformers.
The main component for tube amp is cool […]
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 modem has the secret. With simple firmware flashing you can convert it to more powerfull Zyxel […]
Today I decided to break apart few video cards. There was box of old nVIDIA and ATI video cards. With various connectors and RAM sizes. Here is the collage from GPU images:
To prove that it is broken apart cards, here it is the small photo of GPUs cut off the cards:
As I remmember the […]
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 over a 1.2V to 37V output range. They are exceptionally easy to use and require […]
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 special chip- linear regulator. The unnecessary voltage are disposed by the heat. So this type of […]
Today I visited some old junk shop to check electricity counter and found lots of interesting stuff. I bought two things- Sega Game Gear and Sinclair ZX Spectrum personal computer. I payed 3LTL (~1USD) for Speccy.
It is original ZX Spectrum computer brought to Lithuania from United Kingdom. It is one of the first personal and […]
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