hello,
i m using 16f73 for my x-y table and position is sensed with linear potentiometer.
now to drive dc motor to control speed i need D/A converter without loosing much (eight) pins.
is it posssible to use A/D somehow to get D/A ?
deepak
D/a Using 16f73
Started by ndeepak, Mar 03 2008 05:59 PM
2 replies to this topic
#2
Carl
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Posted 06 March 2008 - 08:10 AM
you can get serial a/d converters have a look at analogue devices
#3
marke
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Posted 07 March 2008 - 08:13 PM
Hello ndeepak
No, you can not use the A/D converter as a D/A converter
The 16f73 does have two PWM modules which can be used to give you an analog output.
The output voltage is controlled by the pulse width. Zero pulse width gives you zero output and 100% pulse width gives you the supply voltage output.
You will need to pass the pulses through a low pass filter to get "DC". The lower the cutoff frequency, the lower the ripple and the slower the response time.
Best regards,
No, you can not use the A/D converter as a D/A converter
The 16f73 does have two PWM modules which can be used to give you an analog output.
The output voltage is controlled by the pulse width. Zero pulse width gives you zero output and 100% pulse width gives you the supply voltage output.
You will need to pass the pulses through a low pass filter to get "DC". The lower the cutoff frequency, the lower the ripple and the slower the response time.
Best regards,
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