Search found 11 matches

by DRCT
Tue Dec 02, 2008 4:42 pm
Forum: General Discussion
Topic: VHDL Programing Books
Replies: 0
Views: 713

VHDL Programing Books

Anyone have any recommendations on a good book on VHDL programming? There are many books out there that talk about circuit design and VHDL at the expense of discussion of the VHDL language. I am looking for a book focused on the language. Any informed replies are appreciated.
Thanks.
by DRCT
Thu Nov 03, 2005 10:28 am
Forum: General Discussion
Topic: PIC controlled power supply
Replies: 3
Views: 1298

PIC controlled power supply

Anyone have a schematic for a PIC controlled power supply? I would like to build a power supply that could output a 0-20v, 0-10A and be varied via a PIC such as having the PIC output a 0-5v signal to vary the 0-20v P.S. output. Any help appreciated! <small>[ November 03, 2005, 10:30 AM: Message edit...
by DRCT
Thu Nov 03, 2005 10:27 am
Forum: General Discussion
Topic: PIC controlled power supply
Replies: 0
Views: 926

PIC controlled power supply

Anyone have a schematic for a PIC controlled power supply? I would like to build a power supply that could output a 0-20v, 0-10A and be varied via a PIC such as having the PIC output a 0-5v signal to vary the 0-20v P.S. output.
Any help appreciated!
by DRCT
Mon Dec 06, 2004 6:40 pm
Forum: General Discussion
Topic: fake keyboard
Replies: 4
Views: 1592

fake keyboard

Is there any mods to the keyboard and mouse input (pins) that can be done to fake the computer into thinking it has a keyboard and mouse attached? I am connecting to a computer with "Remote desktop" and when I try to connect I get an error. I dont want to use a KVM due to lack of space but if I coul...
by DRCT
Thu Mar 06, 2003 10:50 am
Forum: General Discussion
Topic: Varistor specs
Replies: 1
Views: 1079

Varistor specs

Anyone know of data sheet or specs for a matsushita (panasonic) ZNRV20271U or maybe ZNR2027iU Varistor. Not sure if the last digits are 1U or iU. Panasonic is of no help and web search has yet to produce any info.
Thanks.
by DRCT
Fri Jan 31, 2003 9:10 am
Forum: General Discussion
Topic: control of AC voltage
Replies: 5
Views: 2858

Re: control of AC voltage

Thanks Toejam,
The variac controls the filament voltage (~6.3v) on a 50kv electrron gun. The variac needs to be located in the same cabinet as the HV and the control voltage at the user panel needs to be low ~12VDC.
by DRCT
Thu Jan 30, 2003 8:57 pm
Forum: General Discussion
Topic: control of AC voltage
Replies: 5
Views: 2858

Re: control of AC voltage

Thanks Edd, I appreciate your input. As for your questions: the variac runs at about 100VAC @ 1Amp. The load is resistive. I thought about the long shaft and knob but the variac and the cabinet it is inclosed in is several hundred feet away. I was thinking of couple of wires and a POT that could be ...
by DRCT
Thu Jan 30, 2003 2:26 pm
Forum: General Discussion
Topic: control of AC voltage
Replies: 5
Views: 2858

control of AC voltage

Anyone know how to vary the voltage of an AC transformer using a 0-12vdc signal? I now use a 0-130VAC variac, but due to its location near high voltages I do not want to reach in and turn the knob. I also would also not like to use a motor control on the variac. I have heard of puting the load in se...
by DRCT
Thu Apr 18, 2002 3:38 pm
Forum: General Discussion
Topic: LCD Displays for stamp
Replies: 0
Views: 988

LCD Displays for stamp

Does anyone know of a large (as close as possible to 5"x7") LCD screen that can be driven by a microcontroller shuch as a basic stamp or an atom. I have a TOSHIBA TLX-1741-C31 but, I dont know what to look for such as what controller the LCD needs to be able to talk to the stamp. Any help would be a...
by DRCT
Thu Dec 13, 2001 3:31 pm
Forum: General Discussion
Topic: Volt to Freq
Replies: 3
Views: 2093

Re: Volt to Freq

<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by Dean Huster:
I'm just curious. What's the application that requires that kind of open-loop precision?<hr></blockquote><p>A high energy (4-18MeV) X-Ray detector.
by DRCT
Tue Dec 11, 2001 8:01 pm
Forum: General Discussion
Topic: Volt to Freq
Replies: 3
Views: 2093

Volt to Freq

I am looking for a voltage to frequency converter. I have used the LM331 in the past (with success) but fount it to be somewhat temperamental in less than ideal environments. I have followed the suggestions in the data sheet to make it more stable but I would like a V to F converter that is more rob...