Electronics Repair

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CHarge vs use battery

How do you use diodes and capapcitors to switch a 4v power supply so it continuously charges a battery when not being u...
4 comments posted 3yrs
posted by vjp2.at
4 comments posted 3yrs posted by vjp2.at

Re: Rank Arena TV - problems

> On 22 Feb 1999 09:03:10 GMT, Steven Daw put finger to keyboard and > composed: > >I have a old style large (speakers...
2 comments posted 3yrs
posted by theotheo456
2 comments posted 3yrs posted by theotheo456

Sealed pot crackling and scratchy: Perfect fix---

My existing Fosi volume pot crackling and scratchy:  If any of your equipment has this problem.There's a wiper in seale...
0 comments posted 3yrs
posted by kdmdisplay
0 comments posted 3yrs posted by kdmdisplay

Re: Downloading Sony manuals.

> On Sat, 8 Nov 2003 13:22:22 -0000, "rusking" > snipped-for-privacy@beeb.net wrote: > >My point is > >if we just want...
2 comments posted 3yrs
posted by nintendo9231889
2 comments posted 3yrs posted by nintendo9231889

ghosts? take over devices?

-- https://www.youtube.com/watch?v=RbaxhNqBcNM
0 comments posted 3yrs
posted by bruce1.9bowser
0 comments posted 3yrs posted by bruce1.9bowser

HP2621A nonvol backup battery

Looking to identify the 4v battery used to backup settings on 1980 HP2621A CRT video display terminal. I can't find the...
6 comments posted 3yrs
posted by vjp2.at
6 comments posted 3yrs posted by vjp2.at

Raspberry Pi - msdosgeneric

I wonder if I get an rs232-usb connector, and port the .SYS terminal driver (I recoded in assembler but in 1985), I sho...
2 comments posted 3yrs
posted by vjp2.at
2 comments posted 3yrs posted by vjp2.at

self-charging backup battery

I have a 1980 device (HP2621a terminal) with a now discontinued battery which retained settings while off. I am wonderi...
4 comments posted 3yrs
posted by vjp2.at
4 comments posted 3yrs posted by vjp2.at

Philips PM 2518 meter calibration

Does anyone have the Calibration Manual (not the User Manual) for a Philips PM2518 multimeter? There is a way of calibr...
2 comments posted 3yrs
posted by liz
2 comments posted 3yrs posted by liz

format hard drive from USB

I have a laptop with no OS.. well I messed it up I tried to reformat with GParted, but it was supsiciously fast. Format...
12 comments posted 3yrs
posted by vjp2.at
12 comments posted 3yrs posted by vjp2.at