Raspberry Pi
Revised: 24 June 2019 - Design and Content © Bernard Veasey 1996-2019 - All rights reserved.
The Raspberry Pi is a credit card sized computer created by the charity Raspberry Pi Foundation costing around £30. It is made in the Sony factory in Wales at the rate of 11,000 per day. Over 1 million were sold worldwide in its first year. Up to April 2019, 20+ million have been sold. I choose to run RISC OS on it as it is fast to boot up and is intuitive to use. The USB-C power socket in the Pi 4 model needs a 5v 3amp supply so that it can power the two USB-3 and two USB-2 ports as well, but make sure you use a reliable PSU as some cheap imports are known to blow up! The Raspberry Pi 4 model B has the following ports: Power USB-C connector for the PSU - 5v 3amp. Power used: Raspberry Pi 4B, 3.4w (idle), 7.6w (load) Raspberry Pi 3B+, 2.9w (idle), 6.4w (load) Raspberry Pi 2, 1.6w (idle), 3.7w (load) Raspberry Pi (1), 3.2w (idle), 4.2w (load) HDMI x2 Graphics and sound out to a HDMI monitor or TV using micro HDMI ports up to 4Kp60 supported. If two ports are in use they each support 4Kp30. Presumably, this means it can do UHD 3840x2160 and 4K 4096x2160. Ethernet Network cable for up to gigabit networking. 4x USB 2x USB-2 for USB keyboard and mouse etc - and 2x USB-3. Audio out Stereo 3.5mm jack (when HDMI audio not used). Micro SD Socket for a micro SD card to hold the operating system, software and user files. It is best to use the Raspberry Pi with a monitor (or TV) with an HDMI socket supporting up to 4K resolutions, but it can also be used with a monitor with a DVI-D connector if a DVI-D to HDMI adaptor is purchased. It can also manage 1280x1024 @ 60Hz, 1920x1080 @ 60Hz and 1920x1200 @ 60Hz etc.
Raspberry Pi B+
Raspberry Pi model B
Raspberry Pi 2 model B
512MB RAM 700MHz ARM 1176JZFS processor Micro SD card
1GB RAM 900MHz quad core ARM Cortex-A7 processor Micro SD card
RAM - 1GB/2GB/4GB LPDDR4 2400MHz. Processor - 1.5GHz quad core ARM Cortex-A72 - ARMv8 BCM2711 - 64-bit (32-bit compatible). Graphics - Broadcom VideoCore VI -OpenGL ES 3.0. Gigabit Ethernet 2.4/5GHz - 802.11 b/g/n/ac Wireless networking. Bluetooth 5.0 Micro SD card.
Raspberry Pi 4 model B - 85mm x 56mm
1GB 900MHz RAM 1.2GHz quad core ARM Cortex-A53 quad core processor Graphics - Broadcom VideoCore IV 10/100 Ethernet 2.4GHz 802.11n Wireless Bluetooth 4.1 Micro SD card
Raspberry Pi 3 model B
1GB 900MHz RAM 1.4GHz quad core ARM Cortex-A53 quad core processor Graphics - Broadcom VideoCore IV 10/100/1000 Ethernet 2.4/5GHz 802.11ac Wireless Bluetooth 4.2 Micro SD card
Raspberry Pi 3 model B+
Raspberry Pi 4
Official Raspberry 4 Model B Case (Hundreds of others to choose from)