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Computerize Temperature Controller Through LPT-1 Interface Using VB-6

P: 20
My Dear
I want to control temperature of an oven through PC's parallel port LPT-1 and using VB-6.
I have already developed an interface for inputting 8 Bit digital temperature to my PC through LPT-1.
I need programming help in VB6 for the following points.
1. How to input 8 bit data of analog to digital converter (IC N0. ICL-7135CN) to my PC through LPT-1 port to show the actual temperature of oven on PC Screen
2. To indicate a Set Value of temperature
3. Relay output for controlling the Heater ON/OFF if actual oven temperature increases & cross the limit of set value temperature then heater would be OFF otherwise Heater would be ON
4. I can supply the interface circuit to you on your request. If you need interface circuit for programming help. Email us adeebraza@gmail.com
Thanks.
Adeeb Raza
Nov 10 '06 #1
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2 Replies


sashi
Expert 100+
P: 1,754
My Dear
I want to control temperature of an oven through PC's parallel port LPT-1 and using VB-6.
I have already developed an interface for inputting 8 Bit digital temperature to my PC through LPT-1.
I need programming help in VB6 for the following points.
1. How to input 8 bit data of analog to digital converter (IC N0. ICL-7135CN) to my PC through LPT-1 port to show the actual temperature of oven on PC Screen
2. To indicate a Set Value of temperature
3. Relay output for controlling the Heater ON/OFF if actual oven temperature increases & cross the limit of set value temperature then heater would be OFF otherwise Heater would be ON
4. I can supply the interface circuit to you on your request. If you need interface circuit for programming help. Email us adeebraza@gmail.com
Thanks.
Adeeb Raza
Hi there,

Do a little research on parallel port relay curcuit on google.com. I have come across few articles on the above topic. Use IC ULN-2803, it's the best to process signals / data bits from and to parallel port. Good luck & take care.
Nov 10 '06 #2

sashi
Expert 100+
P: 1,754
Hi there,

I have a bonus for you, kindly refer to below attached link for further reading & understanding, hope it helps. Good luck & take care.

http://www.epanorama.net/circuits/parallel_output.html
http://www.logix4u.net/inpout32.htm
Nov 10 '06 #3

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