This is the final PPM RECEIVER scheamtic made with Arduino NANO and the NRF24 module. Make sure the SPI connection is ok. CE and CSN could be any digital pin that you want but CLK must be D13, MOSI must be D11 and MISO must be D12. This board will create one PPM signals on pin D2 with values for 7 channels.
Also check the part list here if you want to buy all the components.
