Arduino Pro Mini NRF24L01 Adapter Coin Cell

Design by: 8372

Nothing fancy, just another NRF24L01 breakout but this time for a arduino pro-mini (3.3v version). NRF board sits over the top of the pro-mini to reduce volume. V+ of NRF chip connects straight to Vcc, hence the need to be a 3.3v pro-mini version. Has space for two optional capacitors accross Vcc to ground (often helps the NRF chip). CE pin goes to pin 9, CSN to pin 10. IRQ can be linked by solder pad to either interrupt 0 or 1 (pin 1 or 2). Placeholder for CR2032 battery attached straight to Vcc (definately need the cap's if using one of these). Jumper just gives another connection to Vcc, Vin and Gnd. I use this as either a wireless connected drop in replacement for pro-mini projects, or a super low power sensor for one of the various sensor networks that use this chip (I always remove the LED and linear regulator off the pro-mini to get really low consumption)