pic mcu to drive analog input

12 years 11 months ago #22557890 by impalazoo
pic mcu to drive analog input was created by impalazoo

I have an AX2850 that I would like to drive in speed mode using a Picaxe 18x 0 to 5volt PWM output .Will this require some sort of lowpass filter or will the AX2850 accept this signal directly.

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12 years 11 months ago #22559741 by cosma
Replied by cosma on topic Re:pic mcu to drive analog input
If your PWM out is a 0% to 100% duty cycle type, you should use an RC filter to convert it to a voltage and use the controller in analog mode.

If you have access to your PIC's timer, you could also program it to output RC-style pulses (1ms full reverse, 1.5ms stop, 2.0ms full forward). The controller would need to be configured in RC mode.

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