10-Codes vs Q-code vs Film set radio confirmations
something something about radio transmissions when...
Bluetooth HC-05 Module
http://www.hc01.com/productdetail?productid=201702040005 https://item.taobao.com/item.htm?spm=a1z10.5-c.w4002-22429966335.24.240a53deu6Q2sz&id=5725927809
Radiacmeter IM-174A/PD
http://www.civildefensemuseum.com/southrad/im174apd-1.html 50uA Full Swing Meter Using...