by yonghui » Wed Apr 06, 2011 4:50 pm
hi,
i think it will be better to use microcontrollers to do this task compared to PT 2262
as mentioned by Sharul, ADC in microcontroller is readily to be used for the analog to digital conversion, then the digital signal is transmitted as wireless after encoding using UART protocol. the ASK thing is done by the RF module already.
at receiver side, the demodulation of ASK is done by receiver module. the signal will be received and UART signal and decode by microcontroller.
in addition to Sharul's comment on using R2R resistor ladder as DAC, u can use the PWM module in microcontroller as the DAC to convert the digital data to analog values. the PWM pulse can be easily changed to analog voltage by simple RC filter of one resistor and one capacitor.
regards,
yh
thanks®ards,
yh