Yearly Archives: 2006

Here is the guts of disposable camera. Simplified schematics diagram of camera flash. Some high power flash tube from scientific equipment. Simple few transistors generator and transformer A transforms 1.5V battery voltage to few hundred of volts. This is quite … Continue reading →

In some www I found image of HDD transformed to grinding stone. It was placed in “jokes” category. But I decided, that small grinding machine is useful for hobbyist. I use old 2G HDD “Western Digital Caviar 22500”. It is … Continue reading →

Soviet radio devices used typical schematics for same class. They called it “unified chassis” or “unified frame”. Here is part of the schematics from II class radio+phone player. Power output, according to manual, is only 1.5W, but it played very … Continue reading →

From “something I found”: The nearer thing in the photo is power supply for some medical amplifier. The further one is the amplifier by itself. The interesting part for tube audio amplifier lovers is power supply. It is stabilised +150V … Continue reading →

I found old audio tube amp: As I can feel some damp in the amp, I can not tell if it is working. I put it in a warm and dry place for some time. The tubes inside are: 4 … Continue reading →

There was very good service from Western Union. This was very easy way to pay online for someone. It was working fine for few years, but today on their web site there is announcement: “Effective December 31, 2005, BidPay.com, Inc. … Continue reading →