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LF: UM3481 or equivilant.

I saw this neat little circuit on a hobby website that uses this chip. It is a melody synthesizer that has about 10 Chr...
5 comments posted 18yrs
posted by tim
5 comments posted 18yrs posted by tim

I am building a simple FM radio transmitter

Well, its not so simple for me actually. Thats the project I have chosen for this semester. The most basic circuit I ha...
2 comments posted 18yrs
posted by faizanahmed666
2 comments posted 18yrs posted by faizanahmed666

Misc. components for sale...

I have the following for sale: ---- 194 x Maxim MAX3181EEUK (+3V to +5.5V, 1.5Mbps RS-232 Receivers in SOT23-5) Datashe...
4 comments posted 18yrs
posted by kris.wilk
4 comments posted 18yrs posted by kris.wilk

high-side current sensing chips

Hi all, I'd like to help out some friends on an antique motorcycle forum that have a 6 volt regulator project. One of t...
26 comments posted 18yrs
posted by nospam
26 comments posted 18yrs posted by nospam

Unknown component

I have a component I am trying to identify. It consists of a glass tube about 3/4" long and 1/8" diameter. Inside this...
8 comments posted 18yrs
posted by bvolcko
8 comments posted 18yrs posted by bvolcko

HEP 590 data?

Hi All, Does anyone have any data on the HEP 590 (and other HEP IC's?) I found a few in my parts box,but have no data. T...
5 comments posted 18yrs
posted by phattymo
5 comments posted 18yrs posted by phattymo

I need transistor SIV300004

or equivalent. I only need one but would like to have some spares. I have looked all over. I would even take a datasheet...
12 comments posted 18yrs
posted by jbleaux
12 comments posted 18yrs posted by jbleaux

Bad voltage regulator?

I think I have a bad 7805 (TO-220) voltage regulator, but maybe I'm just not using it properly. If I apply 5V to the in...
11 comments posted 18yrs
posted by strnbrg59
11 comments posted 18yrs posted by strnbrg59

Help identify an SOIC8 IC - XP SC 8F042A (?)

RE http://www.geocities.com/markaren10/misc/IC.jpg Hi All, Any idea what this might be ? All I have been told is "signa...
1 comments posted 18yrs
posted by markaren10
1 comments posted 18yrs posted by markaren10

Tapped inductors, LC IF-filters, where?

While contemplating a new design I was looking around for tapped inductors and 455kHz IF filters which also can be used...
17 comments posted 18yrs
posted by notthisjoergsch
17 comments posted 18yrs posted by notthisjoergsch

GenRad Binding Post Replacement for 1432 Decades

Has anyone found binding posts that fit the GenRad 1432 Decades? The holes in the panel are .625in, and all the standar...
0 comments posted 18yrs
posted by skamego
0 comments posted 18yrs posted by skamego

1M x 4-bit DRAM 20-pin DIP

I'm searching for a source of a DRAM memory IC that would have the following specs: 20-pin DIP memory chips (16) 1meg x...
3 comments posted 18yrs
posted by keithvz
3 comments posted 18yrs posted by keithvz