controling devices with parallel port

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electric_pk

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Actuay devices are temperature dependant and in particuar range of temperature say(10 to 20 degree centigrade) a device turns on and similary in higher temperature range 2nd device turns on. I have to control 4 devices. wat I am doing is, I take analog output of temperature sensor interms of variable voltage and pass it through ADC and get 8bit data for parallel port and use it in Assembly code. but How can I use this information to control devices. Plz help me.
 

Parallel Port has an 8-bit o/p port, 5-bit i/p port, & 4-bit control bidirectional port, with different addresses. You can use them as your requirement and for analog o/p you can connect DAC at o/p.


bigaussie
 

why go for assembly code,go for C programming

Here is the link for temperature sensor interfacing with parallel port
**broken link removed**

use control port to handle 4 devices

Bibin John
www.bibinjohn.tk
 

First you have to convert analog temperature readings of all devices into digital.

Then with multiplexed mode pass each value to parallel port.

Compare each analog value based on reference voltage and control the device.

..
 

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