Search found 9 matches

by uchwoody
Wed Jul 21, 2004 8:40 am
Forum: General Discussion
Topic: pc based oscilloscope again
Replies: 1
Views: 655

Re: pc based oscilloscope again

I think I shd have used a different icon.
The power ic no is 7805(just that), it seems to have just 3 pins, one is 9v, the other is 5v, and 3 is common. The display driver is LM3914, I think it's used for a dot/bar display, cos it has output lines connected to leds.
by uchwoody
Tue Jul 20, 2004 6:39 am
Forum: General Discussion
Topic: Temperature controlled home brew
Replies: 18
Views: 2882

Re: Temperature controlled home brew

its just that u don't know much about electronics, but u could get someone to build a circuit for u if u find one that suits you. Check out imagineeringezine.com, I think they have a sampling of circuits.
by uchwoody
Tue Jul 20, 2004 6:16 am
Forum: General Discussion
Topic: pc based oscilloscope again
Replies: 1
Views: 655

pc based oscilloscope again

I've got a circuit diag now. But i want 2 modify it a bit.I found an Ic , a display driver whose only purpose is just to signal when voltage level changes polarity. I thought of replacing it with something else, maybe an opamp,or voltage comparator. What d'u think? Also, there's another ic (7402 I t...
by uchwoody
Tue Jul 20, 2004 4:30 am
Forum: General Discussion
Topic: Moisture Sensor
Replies: 9
Views: 1566

Re: Moisture Sensor

<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by Bob Scott: I think you just need a square of poster cardboard normally held up by a spring, but held down by a small piece of TP. If it rains the TP gets wet and weak and breaks, allowing the cardb...
by uchwoody
Tue Jul 20, 2004 4:18 am
Forum: General Discussion
Topic: OPNIONS WANTED sounds too good to be true
Replies: 80
Views: 14545

Re: OPNIONS WANTED sounds too good to be true

<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by High4Volts: it still all boils down to the old rule. You can only convert it, not make it or destroy it. But you gotta love it none the less. :p <hr></blockquote><p>thats right, "there's no such th...
by uchwoody
Mon Jul 05, 2004 9:29 am
Forum: General Discussion
Topic: unidentifiable ICs
Replies: 6
Views: 897

unidentifiable ICs

I've got some ICs that I cannot identify,and I can't seem to be able to find datasheets for them. They include motorola, toshiba, rca, zilog products among others. Can anyone help me find a datasheet(s) 2 identify them.
PS> I think they're obsolete components 'cos I found a Z80 cpu among the lot.
by uchwoody
Mon Jun 21, 2004 3:28 am
Forum: General Discussion
Topic: school project needs help
Replies: 7
Views: 1331

Re: school project needs help

<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by Equinox2355: Well I think I found a resource that will help you. this is a circuit and it even has C code for displaying what you need. I hope this helps.<p> http://www.electronicsforu.com/efylinux...
by uchwoody
Mon Jun 21, 2004 3:26 am
Forum: General Discussion
Topic: school project needs help
Replies: 7
Views: 1331

Re: school project needs help

<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by Equinox2355: Well I think I found a resource that will help you. this is a circuit and it even has C code for displaying what you need. I hope this helps.<p> http://www.electronicsforu.com/efylinux...
by uchwoody
Fri Jun 18, 2004 8:01 pm
Forum: General Discussion
Topic: school project needs help
Replies: 7
Views: 1331

school project needs help

Hi ev'ryone. I'm designing (or I'm supposed 2 design a pc-based oscilloscope) ie one that can take a signal, process it and feed it 2 a pc for display. My problem is that I don't really have any ideas as to how 2 go about it. I thought of using an ADC in a circuit, but I can't figure out how 2 build...