Search found 20 matches
- Sun May 22, 2005 11:07 am
- Forum: General Discussion
- Topic: bse2 and cmos 4021
- Replies: 1
- Views: 1416
bse2 and cmos 4021
Hey,<p>I have a bse2 and a cmos 4021. What I want to do is get the basic stamp to read the information comming off the shift register. Can anyone help me out with a basic schematic. I can do the programming myself, but being a hobbiest, I am unable to understand and put everything togeather
- Thu Apr 07, 2005 5:33 pm
- Forum: General Discussion
- Topic: connect keyboard to serial port
- Replies: 18
- Views: 9018
Re: connect keyboard to serial port
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by stephen: The IM6402 is listed by B. G. Micro at $2.45 (www.bgmicro.com).<p>Alternately, a programmable logic device such as the Xilinx XC9500 series could be used. These are ava...
- Thu Apr 07, 2005 12:46 pm
- Forum: General Discussion
- Topic: connect keyboard to serial port
- Replies: 18
- Views: 9018
Re: connect keyboard to serial port
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by stephen: The easiest UART to use might be the venerable 6402. This might still be avaliable as surplus or from Harris or Intersil. Earlier parts used multiple power supplies. La...
- Wed Apr 06, 2005 4:38 pm
- Forum: General Discussion
- Topic: connect keyboard to serial port
- Replies: 18
- Views: 9018
Re: connect keyboard to serial port
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by Jolly Roger: This can be done and there is a commerical product available to do this. See here:<p> http://l3sys.eskimo.net/kb232/ <p>While somewhat expensive ($79) all the work ...
- Tue Apr 05, 2005 2:34 pm
- Forum: General Discussion
- Topic: connect keyboard to serial port
- Replies: 18
- Views: 9018
Re: connect keyboard to serial port
if I connect a usb keyboard to a usb to serial converter cable, and I were to open up hyperterminal and type the letter "a" on the usb keyboard, will I get an "a" in the hyperterminal?<p>Does anyone know how rs232/serial communcation differ compared to usb communications?<p>To be...
- Tue Apr 05, 2005 12:59 pm
- Forum: General Discussion
- Topic: connect keyboard to serial port
- Replies: 18
- Views: 9018
Re: connect keyboard to serial port
It looks like I cant get any interrupt routines on the basic stamp 2. Therefore it looks like I'm going to go the way of a 68HC705J1A single chip microcontroller. But before I make any final decision, I just wanted to ask: How is it programmed? I have a general idea, after writing the code, it is co...
- Sun Apr 03, 2005 3:16 pm
- Forum: General Discussion
- Topic: connect keyboard to serial port
- Replies: 18
- Views: 9018
Re: connect keyboard to serial port
Does anyone know if a keyboard's clock signal is internal or external to the keyboard.<p>Eg, if I powering the keyboard gnd to ping 2, +5v to ping five, will there be any signal on 1 (kbd clock)? or will I have to supply the clock externally?
- Sun Apr 03, 2005 1:08 pm
- Forum: General Discussion
- Topic: Parallax Basic Stamp II Interrupt Service Routine
- Replies: 1
- Views: 1399
Parallax Basic Stamp II Interrupt Service Routine
Hey,<p>I was just wondering if there is a way to write an interrupt service routine on the bassic stamp II?<p>For instance, every time P0 becomes high (on the rising edge) an ISR is called
- Sun Apr 03, 2005 1:05 pm
- Forum: General Discussion
- Topic: connect keyboard to serial port
- Replies: 18
- Views: 9018
Re: connect keyboard to serial port
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by sofaspud: What is this supposed to be when completed? Are you wanting hyperterminal to read in from COM1 and write out to COM2 or some such? <hr></blockquote><p>This is no schoo...
- Sun Apr 03, 2005 10:21 am
- Forum: General Discussion
- Topic: connect keyboard to serial port
- Replies: 18
- Views: 9018
connect keyboard to serial port
Hey,<p>I was just wondering, is there any way to connect a seccond keyboard to the rs232 port. So lets say I type an "A" on the keyboard, an "A" will appear in a program such as hyperterminal?<p>I noticed this from beyondlogic http://www.beyondlogic.org/keyboard/keybrd.htm <p>But...
- Sun Apr 03, 2005 10:09 am
- Forum: General Discussion
- Topic: chip abbreviations
- Replies: 3
- Views: 2114
Re: chip abbreviations
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by sofaspud: The web is often unkind to the display of subscripts. Whenever you have doubts, the datasheet for the part will usually provide a definition or description of the pins...
- Fri Apr 01, 2005 5:20 pm
- Forum: General Discussion
- Topic: Pull down resistor
- Replies: 10
- Views: 4076
Re: Pull down resistor
What about biasing resistors seen here:
http://www.geofex.com/Article_Folders/cd4053/cd4053.htm
http://www.geofex.com/Article_Folders/cd4053/cd4053.htm
- Fri Apr 01, 2005 4:56 pm
- Forum: General Discussion
- Topic: chip abbreviations
- Replies: 3
- Views: 2114
chip abbreviations
Hey,<p>I'm looking at some schematic diagrams here, and there are abbreviations on the pins that discribe their function. Some of them I know what they mean, but I dont know what they stand for. Other abbreviations I dont recongnize.<p>Can someone shed some light on: Vss Vcc Vdd INH<p>These are only...
- Thu Mar 31, 2005 5:59 pm
- Forum: General Discussion
- Topic: Pull down resistor
- Replies: 10
- Views: 4076
Pull down resistor
Hey,<p>I was just wondering in the circuit diagram here:
http://www.doctronics.co.uk/4016.htm<p>what is the purpos of the pull down resistor? If at all possible can someone post a link to some literature explaining the need/theory of it.<p>Thanks
http://www.doctronics.co.uk/4016.htm<p>what is the purpos of the pull down resistor? If at all possible can someone post a link to some literature explaining the need/theory of it.<p>Thanks
- Wed Mar 30, 2005 12:50 pm
- Forum: General Discussion
- Topic: Audio Control
- Replies: 20
- Views: 7990
Re: Audio Control
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by sofaspud: audio signals coming from, and where are they going to? <hr></blockquote><p>No! Its classified ;) <p>Its comming from my computer, and it will go to the computer's spe...