EPROM and EEPROM Programmers

-----Oorspronkelijk bericht----- Van: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] Namens Jim Brain Verzonden: maandag 30 april 2012 6:23 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: EPROM and EEPROM Programmers On 4/29/2012 11:09 AM, David Riley wrote: > On Apr 29, 2012, at 11:49 AM, Rob Jarratt wrote: > >> 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

I know others have defended the Willem units, and I'll add my note as a

customer. I did do my research: Be aware most Willems will require a parallel port. Most newer units will

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

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

versions are online: http://www.mcumall.com/forum/topic.asp?TOPIC_ID=100 http://www.digital- circuitry.com/FILES/Willem/Willem_Schematics/willem_SCH3Bx.pdf 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