Search found 50 matches

by billdar
Tue Jun 17, 2003 6:08 pm
Forum: General Discussion
Topic: SIMM/DIMM memories
Replies: 3
Views: 809

Re: SIMM/DIMM memories

I've used em for some single board computers I've made around the motorolla 68k family.<p>I built my own controller from a PLD, but I think National Semiconductor or Fairchild make a pre-packaged one now.<p>Pretty much all it is multiplexing your address space for Row/column addresses, and adding in...
by billdar
Tue Feb 25, 2003 12:57 pm
Forum: General Discussion
Topic: Electronics Design Career Info
Replies: 4
Views: 1129

Re: Electronics Design Career Info

Im with Hacklesup... Im in a small company as well.<p>Except I think the benifits balence out by the negatives. Yeah I do design, HW (digital&signal integrity), SW (BIOS&OS&Apps), Marketing, End User Support, and documentation (no sales, woot!) which is cool and keeps it interesting.<p>But the other...
by billdar
Mon Feb 24, 2003 4:01 pm
Forum: General Discussion
Topic: Electronics Design Career Info
Replies: 4
Views: 1129

Re: Electronics Design Career Info

What kind of electronics design?<p>I do a lot of embedded and desktop
system design, and would like to think
myself a proffesional.<p>And I wouldn't mind being interviewed,
Im always looking for an audience to
listen to me talk about myself :) <p>-Bill
by billdar
Sun Jan 26, 2003 8:45 am
Forum: General Discussion
Topic: Some Occilator Help
Replies: 4
Views: 972

Re: Some Occilator Help

Yeah, you were correct about my rounding :) <p>And yeah, I have tried each of the settings with different input clocks. About 20 or so combos tried...<p>Pretty much what I am trying is to feed the Xtalin a digital clock. Its convienient because I have this big 'ol multi-frequency clock generator on ...
by billdar
Fri Jan 24, 2003 2:40 pm
Forum: General Discussion
Topic: Some Occilator Help
Replies: 4
Views: 972

Some Occilator Help

Hello all, this is a horribly specific question.. but you all have an amazing depth for this stuff.<p>Im using an Sigmatel STAC9753 codec for a sound device I am making.<p>Im having trouble getting 2 things.<p>1. I can't seem to get the internal PLL to lock on a digital signal (the data sheet doesn'...
by billdar
Wed Jan 15, 2003 10:20 am
Forum: General Discussion
Topic: heated bobbers
Replies: 7
Views: 1558

Re: heated bobbers

What if you did it chemically instead of electricly? Using that handwarmer liquid or some other, slow exothermic material?
by billdar
Thu Jan 02, 2003 6:44 pm
Forum: General Discussion
Topic: PCI Bus 1
Replies: 3
Views: 942

Re: PCI Bus 1

PCI and AGP have the same exact physical connections, so the bus can have dual function for a specific configuration.<p>The differences come in protocal and speed.<p>AGP has a faster bus clock and more burst data per transfer, but may contain only 1 bus master.<p>Most chipsets define 2 or more PCI b...
by billdar
Mon Dec 30, 2002 11:41 am
Forum: General Discussion
Topic: Autoturret
Replies: 4
Views: 960

Re: Autoturret

This would be a bad a** project... I tried to do the same with one that would follow a laser pointer spot.<p>The algorythm for an automous aiming circuit with a horizontal/vertical component was rediculusly difficult with anykind of percision (read anything short of a grenade would miss )<p>What are...
by billdar
Tue Dec 10, 2002 9:31 am
Forum: General Discussion
Topic: Information required
Replies: 5
Views: 1029

Re: Information required

aound my area (california, us) hydroponics are fairly big.<p>Some use it for growing vegitables, but with questionable legality of medical marijauna people use it as to forgo the government run clubs. As well as recreational uses.<p>But despite the end uses, comercial hydroponic uses are directed at...
by billdar
Wed Dec 04, 2002 1:29 pm
Forum: General Discussion
Topic: Auto switch from battery to USB power?
Replies: 5
Views: 1982

Re: Auto switch from battery to USB power?

I would just use a little double diode ckt.<p> |\ | | /| to usb ----------| >|-----|< |------ to batt. |/ | | | \| | | To ckt power/regulator<p>I use this ckt for battery back-up on a motherboard. (my ascii drawing sucks)<p>it uses a surface mount component like about, part # bat54cct. it measures a...
by billdar
Mon Nov 18, 2002 12:28 pm
Forum: General Discussion
Topic: light sensitive resistor detector circuit
Replies: 21
Views: 4324

Re: light sensitive resistor detector circuit

Dean:<p>Sorry, been gone a little while and jumping back in late.<p>All I was saying is to think about the bulb as a switch. If the bulb is lit, the switch is closed and (here you're correct) you shouldn't see any voltage.<p>But if the bulb goes out, the switch opens and there _is_ a voltage across ...
by billdar
Thu Nov 14, 2002 6:13 pm
Forum: General Discussion
Topic: Different Semiconductor Devices
Replies: 9
Views: 1420

Re: Different Semiconductor Devices

This is like a nice little trivia quiz...<p>I know for sure the SCR is a silicon controlled rectifyer. Only used one once. Its a three- lead device, looks like a diode with an extra wire off the cathode for schematic work. Funtions like a diode with an on/off switch.<p>Im sure someone else can give ...
by billdar
Wed Nov 13, 2002 9:54 am
Forum: Robotics
Topic: 0 1 to -1 0 1
Replies: 15
Views: 5965

Re: 0 1 to -1 0 1

I've been lurking through your posts for a while now, and must say you come up with some unique ideas...<p>This 'trinary' idea is something I've thought a lot about before, mostly because of the increase in computing.<p>But what I could not wrap my mind around, and what I see as a primary draw-back ...
by billdar
Tue Nov 12, 2002 12:53 pm
Forum: General Discussion
Topic: HIRED GUN FOR A CIRCUIT DESIGN
Replies: 9
Views: 1584

Re: HIRED GUN FOR A CIRCUIT DESIGN

I'd have to agree with Joe B on this one...<p>I've done some work before like this, and if
you actually want to sell it later an NDA is
needed. Even before you even outline your
idea to the engineer.
by billdar
Tue Nov 12, 2002 12:48 pm
Forum: General Discussion
Topic: Collector vs Emitter
Replies: 8
Views: 1277

Re: Collector vs Emitter

oh yeah, sorry :) <p>My error correction unit between the brain and
typing fingers temporarily malfunctioned. Thanks
for catching that.