An Arduino Mini is the brains of the operation, paired with an XY-V17B sound module which plays the required animal wailings. There’s also a 433 MHz radio module that lets the prankster trigger ...

The “mini SX1278 LoRa 5-Km wireless transceiver module” from Banggood consists of one RFIC SX1278 ... 12 mA for reception. As far as I know, most of the SX1278 modules use 3.3-V logic. While ...