YES IT WILL!Will it damage my RPi? The 5V and 3V are connected to each other.
I thought that as well but wasn't sure if the wires had pins on them going right through the small pcbsDilligaf wrote:In your picture it looks like you're bypassing the board completely the way it's situated on the breadboard, I think you need the inputs and outputs to bridge the center of the board. Note that I'm not an electronics expert and may be wrong.
Its complete gibberish, unless its actually VDD*0.8 - VSS+0.5V, standard CMOS level. With VDD being the most positive voltage used (VCC), and VSS the most negative (0V that is GND), then it means that the level should be above 0.8 * 5V = 4V or below 0.5V, but seems a "Chinese" Datasheet with errors in it if it real reads "VDD*0.8-VDD+0.5V, standard CMOS level."What does this mean, for the RPi? VDD*0.8-VDD+0.5V, standard CMOS level.
I don't know, and don't want to know, (perhaps the resistors on the board influence the actual levels, who cares)!How is it possible that, when I remove the converter, so the pins/wires are all exactly at the same location as in the pictures, but then without the converter on that place,
5v attached to 3v;
3pins to CLK/DAT/DIM
.. the screen does NOT work,
and when I leave it the way as described in the pictures, bypassing the converter, but included, it actually works great?
(In both situations 3v and 5v are tied together)
Author of this idea should be sued !provission wrote:
Gert has said that the ESD protection on the BCM2835 is not rated for any continuous current: http://www.raspberrypi.org/phpBB3/viewt ... 47#p126547awagner wrote:I completely agree to your analysis for the case that there is an upper protection diode. (Except that 1.2mA is not something that will overload a protection diode. They are also protection against crosstalk and typically can tolerate 10-20mA permanently.)
It seems unlikely that Broadcom will have re-spun the chip unless they absolutely had to. At modern feature sizes, masks are very expensive.Now, it may be the there are several different Pi versions with different input protection circuits out there. Therefore I would ask you to verify the presence of an upper protection diode on yours, and if it indeed has one, we can try to find out what is going on here.
No, according to Gert van Loo, all GPIO's have upper and lower protection diodes, the only exception being the the GPIO's dedicated to the I2C bus of the HDMI port, which are special, see http://www.raspberrypi.org/phpBB3/viewt ... 47#p126547awagner wrote: But the fact of the matter is that _my_ Pi does not have an upper protection diode. I tried to verify that it has (very easy test for presence of a diode) and failed. What _my_ Pi has is a clamping circuit that clamps at around 6.5...7V (100uA input current at 6.5V, as detailed on http://www.tansi.org/rp/interfacing5v.html), regardless of whether the Pi is powered or not. That is consistent with the standard protection on a 5V tolerant 3.3V logic input, implemented, e.g. by a 7V Z-diode.
There is a misunderstanding here as well. The weak pulls are retained over a reset, and while the core is asleep. They are not retained when all power is absent.awagner wrote:and the additional ones on http://www.tansi.org/rp/gpio_startup.html
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