It depends on whether they've improved the power supply circuitry which has been a weakness in most Willem programmers and what devices you want to program. I'd be happy to answer any questions you might have.Ĭlick to expand.Like most things, it depends. Since Willem programmers are hobbyist level, they assume you know something about programming EPROMs so you can do it reliably. All of the components needed should be readily available most of what you need is on the programmer you purchased. I sold Willem's programmers in the US and have small number of bare boards I'd sell at cost if you're interested in assembling your own. Unfortunately it's no longer available commercially. The only Willem variant I would consider buying is the 4.1 which has a relay to switch VCC so it can handle NMOS EPROMs (2716, 2732, etc) and higher capacity CMOS EPROMs (larger than 1Mb). That means they struggle to produce VPP > 12.5V, some even struggle to provide 12.5V. Just understand that all PCB3 variants use a step up regulator to generate VPP and they opt for an inexpensive molded inductor that saturates at a low current. Click to expand.If you're going to program enough EPROMs to justify not having someone else program them for you and you want to stay with an inexpensive Willem based programmer, any PCB3 variant, ATH3.1, or Willem 4.1 can be made to work.
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