v2 of the Raspberry Pi Model B – It’s not just a memory upgrade
We’ve now got the version 2 Raspberry Pi board in stock, and we’ve had a chance to have a close look at it.
It’s not just a memory upgrade.
The most obvious change is the addition of mounting holes, which will be of most use to our subscribers using the raspberry pi for embedded applications.
However, there has been a tiny change that will make a big difference for some people – the removal of the fuse on the USB hub.
This means that the Raspberry Pi can be powered from the same powered USB hub that that powers your other devices – you no longer need to use the micro USB type B plug on the front of the board.
However, these fuses were also limiting each USB port to 140 mA; so their removal means that you will now be able to power a 300mA USB device – making life much easier for those struggling with USB power.
A word of warning though, the board was designed to be powered from the micro USB port, so the capacitor that protects the CPU from power spikes sits at that end of the circuit board. Powering your Raspberry Pi from the USB type A ports means that a power spike will travel the entire distance of the circuit before being buffered by the input capacitor.
Speaking of Capacitors, we also noticed on a close inspection, that the capacitor nearest the USB ports has been increased over the last model. This is useful when you plug a high-powered USB device into your Raspberry Pi while it’s running. Previously, the small capacitor meant that many devices caused a drop in voltage across the whole curcuit, resulting in a reboot of your Pi. The increase in capacitance will lead to less reboots.
A little more information is here: http://www.v3.co.uk/v3-uk/news/2203223/raspberry-pi-gets-a-board-makeover
Incidentally, we also noticed the “made in china” printed on our Raspberry Pi model B revision 1 now reads “made in the United Kingdom” on our revision 2 board.