T&L Publications

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

<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...

<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...

<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 ...

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...

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...

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?

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

<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...

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...

<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...

What about biasing resistors seen here:
http://www.geofex.com/Article_Folders/cd4053/cd4053.htm

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...

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

<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...