As part of the Arduino class I'm teaching at the Art Center College of Design in Pasadena, CA, US, I want to demonstrate some techniques you can use to check the validity of Serial data. I'm like to set up one Arduino board to auto-generate some ASCII data...some of it correct, some of it garbled...and be able to have that one board stream it to numerous student Arduino boards in the class.
Can I just do something as simple as just split the signal coming out of the master Arduino's TX pin and have each student plug a lead into their board's RX pin? With no connection back to the master board? It seems doubtful to me.
If that won't work, any suggestions on how I could accomplish this?