microcontroller PWM controlling

[Ahamd Seirafi]

Thanks again to all who reply.

You will find a attached file for the schematic which I designed.

The circuit is designed to read 8 PT100 sensors on PC using parallel port.

I need to use a micro controller instead and controlling 8 heaters concerning to the temperature sensors.

Can you help me find the suitable micro controller supporting 8 PWM outputs?

I deal with Atmel 89C52 and programming with C.

Best regards.

 

[egeorgiev]

The pdf of your schematic is too coarse to be readable - what I figured out is a mux and an adc controlled by the PP.
The Stellaris® Family of ARM® Cortex™-M3 - LM3S2608 from TI supports 8 PWM; Freescale Semiconductor MAC7101 supports 16, STMicroelectronics STM32F103RC but these are all ARM devices. Infineon has a 8051 device - C509-L but I've never used it! The 89C52 will be of little use - it has neither ADC nor PWM.

 

[Ahamd Seirafi]

Thanks for reply.

Can the PC do with this job if I connect my circuit to it using ISA port?

thanks.

 

[Tahmid]

Hi,
Although maybe overkill, you can look at ATmega640.
16-channel PWM
16-channel ADC (10-bit)
Also have a look at ATmega1280, 1281.
These may be overkill but may come to help.
Tahmid.