And the specific items you got for each of those were? Hard to provide any feedback when you don't provide specifics.FrustrationPi wrote:3 usb hubs, 2 sd cards, 2 keyboards, 2 power supplies.
Actually, the uUSB charger was first accepted in 2007, and ratified in 2009 - in Europe at least, so chargers have been around since 2007. I noticed the other day that I have more uUSB cables than mini's, and had to really dig to find a B connector cable!obcd wrote:It's a design flaw.
The universal usb chargers that the Pi is supposed to work with should output a voltage between 4.85V and 5.25V between no load and maximum load conditions. (European recommended regulations)
4.85V is the minimum voltage you need for a stable Pi operation.
There is no such thing as an ohmless cable, so there will always be an additional small voltage drop over the cable. The same counts for the input polyfuse.
While it's known that chinese suppliers don't care much about the specs, even with supplies following the specs you can run into problems.
The alpha boards had a step down power supply on the board. Their input voltage was something like 7 - 12V. It was left out to cut the price.
Besides that, the Pi should be low cost since you can reuse the devices you have lying around. For that reason, the 5V power adapter was choosen. They only started to use those adapters for cellphones less than a year ago. So, I don't think much people have one lying around. You can use the one of your cellphone if you are lucky, but besides for first time experimenting, this is not very practical.
I know people will argue, and some will say they had the Pi running down to 4.3V. Apparantly usb doesn't work at those voltages, but to prove the Pi isn't having issues with lower voltages, everything is allowed. I had 3 identical power adapters. One had a voltage that was 0.02V lower than the other. The TP1 - TP2 voltage was approx. 4.83V. The one with the lower voltage caused interference on the monitor. It went away by boosting the hdmi signal in the config.txt file. You can blame the monitor..It keeps this Forums alive and kicking...But others might use the same monitor...So, I am not going to tell them everything is fine if they only measure 4.80V between TP1 and TP2. And I will also not tell that the Pi works stable down to 4.75V It's simply not always the case.
Don't get me wrong, this is no complain or whining. It's just a conclusion I think people should be aware about.