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PCB etching w. hardware store muriatic acid

...and 3% hydrogen peroxide from the drugstore? What ratio, and will it work at room temperature? If cheap 3% peroxide...
1 comments posted 22yrs
posted by zxcvbob
1 comments posted 22yrs posted by zxcvbob

Hans Camenzind's (free, downloadable) Book

Check out Hans Camenzind's (free, downloadable) book.... http://www.arraydesign.com/designinganalogchips.pdf ...Jim Tho...
76 comments posted 22yrs
posted by thegreatone
76 comments posted 22yrs posted by thegreatone

Farnell G24-10A PSU - current-limit modification

I have an old Farnell G-series switched-mode PSU, type G24-10A (240 watt, 24V 10A) and it shuts down completely when th...
2 comments posted 22yrs
posted by mail
2 comments posted 22yrs posted by mail

Small Switching power supplies and small fans

I help take apart old computers for the scrap value for a guy and have been saving the small switching supplies from th...
1 comments posted 22yrs
posted by rhuish
1 comments posted 22yrs posted by rhuish

solder alternatives?

hey all-- i have a 4 digit LED which has three pins broken off, as well as a 68HC11 board which has a transistor that b...
2 comments posted 22yrs
posted by mehaase
2 comments posted 22yrs posted by mehaase

parallel port SCSI controller

Has anyone come across a schematic for a PC parallel port SCSI controller? I think I've got one figured out on paper bu...
5 comments posted 22yrs
posted by julesrichardsonuk
5 comments posted 22yrs posted by julesrichardsonuk

Tek 2710 problem - Help!

Tek gurus: I've got a Tektronix 2710 spectrum analyzer with an interesting problem - when it powers up, I only get a st...
0 comments posted 22yrs
posted by rob
0 comments posted 22yrs posted by rob

OpAmp - easy question

Hey-- 9V is a weird voltage in a lot of projects. We used OpAmps in an entry-level EE course where we had access to ben...
1 comments posted 22yrs
posted by mehaase
1 comments posted 22yrs posted by mehaase

Car Alternator as Human Powered Generator

Hello All, I do some volunteer work that provides rural villagers in Nepal with WiFi communication (See http://NepalWir...
117 comments posted 22yrs
posted by Robin
117 comments posted 22yrs posted by Robin

Elecronic devices will hunt humans !

They are predators, they want our flesh. So prepare to be killed and eaten by your toaster, soon.
4 comments posted 22yrs
posted by celt_sites
4 comments posted 22yrs posted by celt_sites

Soldering TSOP/TSSOP devices

I don't have much experience with SMT and am now in a position where I have to mount a TSSOP packaged device to complet...
2 comments posted 22yrs
posted by nospam
2 comments posted 22yrs posted by nospam

looking for fast low CISS fet

Hi all, I'm trying to find a fast 8amp fet with as low as possible capacitance. Voltage need only be low such as 30V or...
0 comments posted 22yrs
posted by exxos
0 comments posted 22yrs posted by exxos

Sony KV27V22 will not power up

Hi, I have a Sony model KV27V22, will not power up upon inspection I noticed cap C613 on the Power Supply Module was bu...
0 comments posted 22yrs
posted by albertpinto
0 comments posted 22yrs posted by albertpinto