cactusface
Senior Member
Hi,
When I first saw the AXE401 shield I got the kit and quickly put it together. But then was'ent sure what I was going to do with it! I would'ent be buying any of those fancy add on shields, but it was the idea of modular units that plug together that I liked. Do I really need two voltsage regs and all those I/O pins that seemed to have no order at all. I'm not trying to put the shield down, it's great, but perhaps it's horses for courses!! Perhaps I'm a bit too methodical with a touch of OCD thrown in..
So I set about building my own simpler version of the shield? keeping to about the same size board, but using a Picaxe 20M2 (or 20X2), the two ports are just pulled out to the sides, on 8 pin raised sockets, power and other signals are on the 2 6 pin sockets.
I included a 32K EEprom and the DS1307 RTC with battery backup, a 2 pin header for a battery connection, the usual power and programming sockets.
My first add on is a LCD board, this uses an 18M2 with the new? free LCD driver code. As usual a 10K preset controls the contrast while an 2N7000 fet controls the backlight it being active high, controlled from c.0 on the 18M2, not much on this board really. The 3 pin header gives these options for the backlight: link 1-2 B/L control via software, link 2-3 B/L forced on, no link B/L disabled.
It's proving to be very useful and the idea that just by swapping a small PCB around it does or becomes something very different, is good. Here's the first couple of files. For those who don't use Diptrace I can do PDF's
Regards
Mel.
When I first saw the AXE401 shield I got the kit and quickly put it together. But then was'ent sure what I was going to do with it! I would'ent be buying any of those fancy add on shields, but it was the idea of modular units that plug together that I liked. Do I really need two voltsage regs and all those I/O pins that seemed to have no order at all. I'm not trying to put the shield down, it's great, but perhaps it's horses for courses!! Perhaps I'm a bit too methodical with a touch of OCD thrown in..
So I set about building my own simpler version of the shield? keeping to about the same size board, but using a Picaxe 20M2 (or 20X2), the two ports are just pulled out to the sides, on 8 pin raised sockets, power and other signals are on the 2 6 pin sockets.
I included a 32K EEprom and the DS1307 RTC with battery backup, a 2 pin header for a battery connection, the usual power and programming sockets.
My first add on is a LCD board, this uses an 18M2 with the new? free LCD driver code. As usual a 10K preset controls the contrast while an 2N7000 fet controls the backlight it being active high, controlled from c.0 on the 18M2, not much on this board really. The 3 pin header gives these options for the backlight: link 1-2 B/L control via software, link 2-3 B/L forced on, no link B/L disabled.
It's proving to be very useful and the idea that just by swapping a small PCB around it does or becomes something very different, is good. Here's the first couple of files. For those who don't use Diptrace I can do PDF's
Regards
Mel.
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