T&L Publications

Both I/O port and NTport are available from Upper Canada Technologies for free. It is a "demo" with a suggested donation if you like the product.<p>The try it for free link is a working componant for the VB library and works without time restriction.<p>I have used both products and they wo...

Chess,<p>When is your project due? Are you still needing the CC schematic??<p>g

If you would like a schematic, i can post one for you. I also have the parts but it seems VERY expensive to ship to where you are.<p>g

The farenheight sensor is the LM34 and the celsius sensor is the LM35. These are linear, three terminal devices that output 10mV per degree celsius or degree farenheight. They both have a range of 180 steps, So full scale and at 10 mV is a full output voltage of 2.56 volts. <p>Vref/2 for the A/D sho...

No trouble...<p>g

Is there a reason you want to use the serial port over parallel port? <p>Using the parallel port, you do not have to worry about baud rate, start/stop or parity bits or opening and closing the com ports.<p>With the parallel port, i use a program called NT port and the visual basic code is very simpl...

I dont think so.... :-)<p>But, the A/D is very simple to wireup with a temp sensor.<p>With about 100 lines of code in c++, you can make a loging program that will log temperature into a text file.<p>Can you read schematics? I can quickly draft a simple circuit for you, and email the program or sourc...

Hey Guys,<p>How does one become a moderator to this site? I have noticed it is ummoderated and possibly does not need one but how do you become one??<p>Just thinking.......<p>[ April 28, 2003: Message edited by: Greg ]</p>

Check out the following links:<p>Rectification<p>Intro<p>Diodes.....<p>That should help you out. You should check into some online tutorials on DC and AC signals as well as semiconductor theory.<p>Greg

Nope you still need to rectify the signal and filter it.<p>I just drew up two schmatics for you. Take a look here:<p>Power Supply Schematic<p>greg

Well, I believe most of us here do.<p>Here is a brief summary.<p>The main parts of a DC supply are:<p>1. Step Down Transformer 2. Rectifier 3. Filter 4. IC Regulator 5. Load<p> 1. Step Down Transformer <p>The incoming ac voltage must be stepped-down (decreased) by a transformer. The voltage is stepp...

The UART connects directly with the system BUS for the parallel but requires the max chip for the TTL to RS232 and RS232 to TTL serial Data.<p>Thus the max chip is needed.<p>Unfortunatly, I only have C++ available for the UART. The visual basic code is for use with the ADR products. <p>I will search...

One more thing,<p>The serial port cannont accept random data like the parallel port. Thus your software must be configured with the bit parameters.<p>An ic that can add the proper start and stop bits, as well as sending the data at the proper baud rate is the PC16550 UART. The UART requires 8 bit pa...

Check out the MAX232.<p>The max chip will convert TTL to RS232 levels for you and its cheap!<p>You must also use a null modem configuration to trick the serial port into thinking handshaking signals are present.<p>Check these links out:<p> Connection Possibility, shows null modem <p> PDF Datasheet <...

Take a look at a simple circuit for an emergency backup light.<p>Should be lots of resources on the net