Re: Re: PIC universal programmer - spec and design | Piclist

Hello ydexter, According to your specification you might do this: 1. Choose one of available programmers, 2. Draw new schematic with external power supply and more reliable RS-232 interface, 3. Design new PCB, 4. Build and test with existing software, 5. Publish new solution on the web. If it is going to be low voltage ICSP programmer (LVP) and if software for PIC18F8x20 and PIC18F6x20 exists I'll be interested in contributing to this project. Just let me know if you want to do it. Is this OK? Regards, Igor ----- Original Message ----- From: "ydexter" <> To: <> Sent: 09.04.2004. 11:05 AM Subject: [piclist] Re: PIC universal programmer - spec and design > OK, I started a storm with this thread, even I didn't intended to do > this. I even specified my requests , by I will repeat them. I asked to > see if it is possible to get them all. > I inserted the answers -> > > --- In , "mikerey35475" <mwrey@b...> wrote: > > ydexter, > > > > I have read all the posts in this thread and at the risk of > > sounding rude, I have some questions to ask. > > > > 1) What exactly are you looking for in a PIC programmer ? > > True power supply, not using a RS232 or any other port's voltage. > RS232 is not able to supply a high current, and especially is not > stable. This is a cheap trick used by some designers. I think it is OK > to use this for some low current sinkers. > > > 2) What type of interface do you want to use ? (Serial, parallel, USB) > > Serial would be nice. USB is on the market for more years, but it > didn't replaced the RS232 port. Why? RS232 is simple and well spreaded. > So I'm ok with the serial RS232 port. > > > 3) At what level are you working with PICs ? (Hobby, professional, > > etc) > > Hobby for now, maybe proffesional low series later. > > > 4) Have you tried any of the free PIC programmer designs and their > > variations ? > > I tried JDM, the schematics are on the > http://www.jdm.homepage.dk/newpic.htm > It was ok, I had some problems for serial cables longer that 1m, but > now it is OK - I use it togheter with ICPROG. > I tried to analize the long cable problem , especially it was only 2m > long, so I was troubled because of the signals problem. 2m is not a > long cable , I don't think we are working with microwaves here. > So I started with the idea to find some programmer with no compromise. > Wouter suggested that there are some unavoidable spikes on PIC > programmers. What to say then about Ethernet with 100m at 100Mbs, what > about 1-wire with almost 600m cable. And still they are working fine, > especially Ethernet. I asked just to see if I can make some > programmers with no compromise, I'm not interested in price as long as > it is not so high - $200 for a programmer is far too much - it is > almost the price for a powerfull hardware for my PC. I know the > programmers are low series, but come on, they are too expensive for > me. I like to have a $1000 ossciloscope to see the spikes, because I'm > not so good at DSP. > > > to unsubscribe, go to http://www.yahoogroups.com and follow the instructions > Yahoo! Groups Links

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Re: Re: PIC universal programmer - spec and design - Igor Janjatovic - Apr 9 4:37:00 2004