In these short tutorials we review the layout of the Raspberry Pi Models 3B, 3B+ and 4B, discussing the connectors and integrated circuits.
Layout Of Your Raspberry Pi
Raspberry Pi Model 3B
Raspberry Pi Model 3B+
Raspberry Pi Model 4B
Useful Links
Raspberry Pi Wiki: https://en.wikipedia.org/wiki/Raspberry_Pi
Which Pi To Buy: https://pharian.co.uk/raspberry-pi-club/which-pi-to-buy/