29 Apr
2012
29 Apr
'12
9:23 p.m.
On 4/29/2012 11:09 AM, David Riley wrote:
On Apr 29, 2012, at 11:49 AM, Rob Jarratt wrote:
I know others have defended the Willem units, and I'll add my note as a
satisfied customer. I did do my research:
Be aware most Willems will require a parallel port. Most newer units
will also sport a USB port, but it's for power only.
Some of the newer units will indeed work with USB.
Either way, buy a unit with a socket for an external power supply. The
on board charge pump can't do enough with USB supplied power to handle
all of the EPROM programming variants.
Note that you can build your own Willem, the schematics for the parallel
port versions are online:
http://www.mcumall.com/forum/topic.asp?TOPIC_ID=100
http://www.digital-circuitry.com/FILES/Willem/Willem_Schematics/willem_SCH3…
You can turn the v3 into a v4.5:
http://www.py2bbs.qsl.br/willem_pcb45en.php
I think there is a Linux programming app (not sure how current it is):
http://sourceforge.net/projects/geepro/
Jim
--
Jim Brain
brain at jbrain.com
www.jbrain.com
I believe the Willem programmer may be suitable,
it is certainly affordable,
would that fit the bill? It seems to come from Thailand, although there seem
to be all sorts of sources on ebay, so I am not sure what the genuine source
really is.
I am also not averse to buying secondhand, ebay or otherwise, if I can get
something that is going to be more generally useful than the Willem.
I've
heard some pretty bad things about the Willem programmer.