Yes, you can get an Arduino R3 on eBay for <$4 with shipping... The GPIB connector will cost you more!
Didier KO4BB On January 12, 2015 8:45:12 AM CST, paul swed <paulsw...@gmail.com> wrote: >That certainly is a hack. But its something I have often thought about >and >never did. He is right its really a one instrument interface as it >doesn't >have the buffers to drive the load of multiple instruments. >But heavens that has to be a really cheap interface for a bit of >soldering >effort. My type of effort. :-) >Regards >Paul. >WB8TSL > >On Sun, Jan 11, 2015 at 11:57 PM, Joseph Gray <jg...@zianet.com> wrote: > >> I thought everyone here would find this of interest. I stumbled >across it a >> few days ago on the 'net. It is a Prologix GPIB-USB compatible made >with an >> Arduino Uno. >> >> >> >http://egirland.blogspot.com/2014/03/arduino-uno-as-usb-to-gpib-controller.html >> >> Like on his web site, I just took a cheap GPIB cable, cut off about >12 >> inches and shoved the wires into the socket holes on an Uno. I >uploaded his >> program and did some minor testing so far. BTW, it didn't work the >first >> time due to poor contact. I shoved some pin headers in, after the >wires and >> now it works fine. >> >> John's Prologix config program works just fine with this cobbled >together >> GPIB adapter. I attached it to my HP 3457A and then ran the demo >program >> that comes with Ulrich's EZGPIB. It is logging data as I type this. I >will >> do more testing with other instruments, as I have time. >> >> As mentioned on the web page linked above, a few commands are not yet >> implemented, although they appear to be little used commands (except >> perhaps the ++savecfg command). I think I have a way to implement the >++rst >> command using the watchdog timer. For ++savecfg, it shouldn't be too >> difficult to store things in the Arduino EEPROM. >> >> I have some cheap Arduino Nano's and PCB-mount GPIB connectors on >order. I >> will be making a couple of these Proligix-compatible adapters with >those >> parts, so that they aren't just wires shoved into a board. I'll have >to >> find a small box to house things. I have also ordered some buffer >chips to >> add to the design. Total cost should be under $20 for each adapter. >> >> The firmware uses a serial baud rate of 115200, which I assume is the >same >> as a real Prologix. I'm going to try some higher baud rates to see >how fast >> the Arduino can push bits without losing them. I understand that with >the >> default 16 MHz clock, non-standard baud rates that are evenly >divisible >> into the clock rate should work even better I'll report back. >> >> One question about the baud rate - are there any reasons not to >change from >> 115200? Since we are simply moving bits through a USB/Serial adapter, >does >> any software really care what the baud rate is, as long as we don't >drop >> any bits? >> >> Joe Gray >> W5JG >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >_______________________________________________ >time-nuts mailing list -- time-nuts@febo.com >To unsubscribe, go to >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. -- Sent from my Motorola Droid Razr HD 4G LTE wireless tracker while I do other things. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.