RF Transmitter and Receiver WRL-10535 and WRL-10533

Using Arduino General Electronics
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Yes, 9V battery not the greatest for Arduino. 1/2 the capacity wasted as heat just going thru the regulator.
Using a switching regulator such as this to make 5V and then powering the 5V at the header pin is better.

R-78Exx-0.5 DC-DC.pdf (70.3 KB)