I am new to Arduino. I am trying to build a project using the Mega2560 connected to a: 433MHz RF transmitter and receiver, SD Card MP3 Sound Module, Digital Pressure Sensor, 3.2" TFT LCD Display+Touch Panel, CO Gas Sensor, 4-Channel 5V Relay Module, and possibly other components. The Touch Screen will take up all the digital in/out pins will there be enough pins to incorporate the rest of the components?Is the 433Hz RF T&R capable of very much traffic?I figure with enough time and patience i should be able to assemble all of these components into a running machine. Oh course that all depends on whether the Mega can handle all of the components. If you have used any of the components mentions or know someone who has i would greatly appreciate links to code or tips on how to get this project off the ground and running. Below are links to the components i am considering purchasing for this project. ___Links________________________________433MHz RF transmitter and receiver:http://www.ebay.com/itm/261089770447?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649SD Card MP3 Sound Module:http://www.ebay.com/itm/251109033572?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649Digital Pressure Sensor:http://www.ebay.com/itm/140778886459?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_2424wt_10373.2" TFT LCD Display+Touch Panel:http://www.ebay.com/itm/280909341858?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649CO Gas Sensor:http://www.ebay.com/itm/261090338258?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_1952wt_15034-Channel 5V Relay Module:http://www.ebay.com/itm/271053549611?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
Speaking of tolerances. I am wanting to attach this circuit to a run off a car battery. How do i prevent the Amperage of the battery from frying my Mega? Would a level shifter do this?Can you explain what a level shifter does?