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1  Using Arduino / General Electronics / Re: Understanding this H-bridge on: December 29, 2012, 02:20:56 pm
2  Using Arduino / General Electronics / Re: Understanding this H-bridge on: December 29, 2012, 02:17:09 pm

This is how the H-bridge is wired to our arduinos (university project).

The G pins are just the gates of the MOSFETs, so you bias them like any MOSFET,
Vgs > 0 for the n-MOSFETs [lower devices], and Vgs < 0 for the p-MOSFETs [upper
devices]. IOW, if S1,S4 are tied to 5V, then 0V on the gates turns on the upper
devices and 5V turns on the lower devices.

These lower devices do you mean G2 and G3? if S1,S4 is tied to 5v through the schematic that means G1 and G4 will be high and if I send a high signal through pin 5 it will set G1 and G2 HIGH therefore a path through G4 and G2 will be accepted? Correct?

3  Using Arduino / General Electronics / Understanding this H-bridge on: December 29, 2012, 12:14:23 pm
Hey guys,

This is the data-sheet of the h-bridge i'm trying to understand. How are the G1, G2, G3, G4 terminals working? Are any of them on active HIGH or active LOW?

Thank you,
4  Using Arduino / Displays / Re: 24 pin LCD screen on: November 17, 2012, 10:06:06 am
It is actually fairly fancy lcd controller: unlike most epson controllers, this one has data bytes following some commands bytes. It allows virtual windowing and layering, so you can do fancy animation on this thing.

In terms of interfacing, the display datasheet didn't provide anything information regarding the touch panel so you are out of luck there.

The lcd controller itself is reasonably simple: it utilizes a 8080 interface (sel1/2 cleared). The commands are in Section 8. To start, you may want to just write to it, and use internal fonts. At a minimum, you need to implement reset, display on/off, and go to x/y commands. From there, you can implement memory write so you can load up your own fonts / images.

Thank you for all your replies, but dhenry, how shall I connect the ribbon cable up to the arduino board, I've only had my board a week and been given lots of stuff to play with by a friend, so I am fairly new to this. I doubt the arduino will be able to produce a high enough clock frequency and a high enough current so are there any shields that have my connection as well as the right amps?

5  Using Arduino / Displays / 24 pin LCD screen on: November 16, 2012, 02:11:45 pm
Hey guys,

First post! I've been given one of these screens (the spec is available for download at the bottom in pdf). I'm just wondering if there is anyway I can get it to work with an arduino? And if so, can anybody put me in the right direction.

Thank you!

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