For VCC, I'd check for 4.2, 5.0, 6.0, 6.25 with a drop of 0.1V or less at 50mA. I would ask the Seller if the programmer can provide VCC and VPP at the required voltages and currents for reading/programming devices. 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. Click to expand.Like most things, it depends. When I contacted the company, they just told me my model was obsolete and that I should purchase a newer model. I had a 'professional' EPROM programmer and discovered the hard way that it didn't verify erase margin correctly. Paying hundreds of dollars for a commercial programmer doesn't necessarily mean it programs devices reliably. I work around that unknown by verifying programmed devices at several voltages (all mentioned in typical programming algorithms).
Willem programmers satisfy my needs though I would like software to be more open so the algorithms can be examined. Hi John, I don't have any recommendations for other programmers. I'd be happy to answer any questions you might have. 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. Nice idea, but they failed on the implementation. But, as I said, that particular variant is useless. Because of that, it can only provide about 25mA of current.īecause they typically sand the part numbers from the IC's on that variant, it's difficult to modify. I'd start with version 0.97ja It's been awhile since I've thought about that programmer, but I do recall that that design uses the output of an OP AMP to supply some of the voltages. That being said, you can download software from. In my experience (I have one), it is unusable for reading or writing EPROMs.
Restless Nights Karla Bonoff Rar File.Ĭlick to expand.Unfortunately, you've purchased the infamous 'Enhanced Universal Willem EPROM Programmer'. Pcb5.0E Willem Eprom Programmer Software Download. If the board selection set to PCB3.5, PCB5.0, PCB5.5C, then the software 0.98D6 should be used.
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