Click to expand.Unfortunately, you've purchased the infamous 'Enhanced Universal Willem EPROM Programmer'. In my experience (I have one), it is unusable for reading or writing EPROMs. That being said, you can download software from sivava.com. 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. Because of that, it can only provide about 25mA of current. Because they typically sand the part numbers from the IC's on that variant, it's difficult to modify. But, as I said, that particular variant is useless.

Nice idea, but they failed on the implementation. 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. 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. That means they struggle to produce VPP > 12.5V, some even struggle to provide 12.5V. 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).

Unfortunately it's no longer available commercially. 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. All of the components needed should be readily available; most of what you need is on the programmer you purchased.

Find great deals on eBay for Willem EPROM Programmer in Electrical Assemblies and EM Devices. Shop with confidence.

Repair mov files osx on pc. Since Willem programmers are hobbyist level, they assume you know something about programming EPROMs so you can do it reliably. I'd be happy to answer any questions you might have. Hi John, I don't have any recommendations for other programmers.

Willem programmers satisfy my needs; though I would like software to be more open so the algorithms can be examined. I work around that unknown by verifying programmed devices at several voltages (all mentioned in typical programming algorithms).

Paying hundreds of dollars for a commercial programmer doesn't necessarily mean it programs devices reliably. I had a 'professional' EPROM programmer and discovered the hard way that it didn't verify erase margin correctly. When I contacted the company, they just told me my model was obsolete and that I should purchase a newer model.

Click to expand.Like most things, it depends. 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 would ask the Seller if the programmer can provide VCC and VPP at the required voltages and currents for reading/programming devices. For VCC, I'd check for 4.2, 5.0, 6.0, 6.25 with a drop of 0.1V or less at 50mA. For VPP, I'd check for 12.75, 21.0, 25.0 with a drop of less than 0.25V at 50mA.

If they say they can program NMOS EPROMs, they need to be able to provide VCC at 100mA. If you buy one that can't do this, return it as it's unsuitable for use as a programmer. Proper programming of a 5V (10% tolerance) 27C512 requires VCC options of.

No sure if I put this in the right place or not. Here goes nothing. I recently obtained a willem eprom programmer pcb5.0e. Currently running Willem Eprom PCB5.0C (0.98D8) software.

My question is do I need drivers for this programmer and is this the right software to run this programmer. When I got it, it didn't come with the software and if their was a driver didn't get it. The software I got off the internet and really not sure if its the right one. Installed the software and when I try to connect the programmer to it. I get an error message 'Hardware error: check power and connections.'

Checked all of that and it seems like the everything is plugged in right. When I power the programmer up a green light comes on where is says power, but can't seem to connect the device. Am I missing something.

Is there other lights that come on when it powers up. If I got the wrong softer and need drivers can somebody help me obtain them or send me a link to download them. I included a pic of the programmer I have too. Thanks in advance. Click to expand.Thanks for the website, but I can't seem to download the first one on the list. And all the other ones are not for the pcb5.0e. They are only for earlier models.