Hello i am working on a project the last year now but the lack of knowledge on electronics probably creats the most of my problems. i have allready finished with the rest of my project but now i want to sent a string of 24 chars with ultrasounds from one port from my arduino mega and receive it to an other.
i have fount this schematics over internet and i have connected trancmiter to pin 7 and receiver to pin 8
analogRead on the receiver gives me nothing. ither i am doing something wrong or i cand drive the transmiter !
first of all is something like that going to work ?
should i play with pwm of the transmiter and receiver ports while both works under 40khz ? and if yes, HOW ?
digitalRead and write or analogRead and Write ?
Please help !