Lpc2000

--- In lpc2000@yahoogroups.com, "Ed Schlunder" <zilym@y...> wrote:
>
> I'm thinking of building the DIY wiggler so that I can program and
> debug some LPC2103 chips on the cheap.
> 
> I see the wiggler.txt schematic in the files area. It is using a
> 74AC244 chip to do voltage level conversion between the PC and the
> LPC21xx chip. It only seems to use 4 line drivers of the 74AC244 
chip
> (half the chip is left unused). 
> 
> Would there be any problem with using a 74VHC08 quad 2 input AND 
gate
> chip instead? I would just tie one side of each AND gate high so 
that
> it can be used as 4 line drivers. This chip is cheaper and smaller
> than the 74AC244.
> 
> The schematic also uses a DTC114 NPN transistor. I don't have any
> DTC114 transistors. Would MMBT3904 work okay instead?
> 
> Any other tips for a DIY wiggler?
>

Unless actually building/debugger a wiggler is your gig, you might 
consider purchasing a cheap clone e.g. http://olimex.com/dev/arm-
jtag.html