Re: [time-nuts] Arduino GPIB
Marvelous. Is there any reason not to adapt this to an Arduino with a network shield? Don Joseph Gray 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. -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road Huson, MT, 59846 mail: POBox 404 Frenchtown MT 59834-0404 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com ___ 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.
Re: [time-nuts] Arduino GPIB
On 1/12/15 1:00 PM, Tom Van Baak wrote: Yes, you can get an Arduino R3 on eBay for $4 with shipping... The GPIB connector will cost you more! Didier KO4BB A sandwich of two PCB is about the same thickness as the center plug of a GPIB male connector. So layout 2x12 pads to match the pins and you have a one-piece Arduino and GPIB connector board. With a bit of masking tape and baling wire to hold it in place, and you're set.. ___ 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.
Re: [time-nuts] Arduino GPIB
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.
Re: [time-nuts] Arduino GPIB
Yes, you can get an Arduino R3 on eBay for $4 with shipping... The GPIB connector will cost you more! Didier KO4BB A sandwich of two PCB is about the same thickness as the center plug of a GPIB male connector. So layout 2x12 pads to match the pins and you have a one-piece Arduino and GPIB connector board. /tvb ___ 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.
Re: [time-nuts] Arduino GPIB
On Mon, Jan 12, 2015 at 6:45 AM, paul swed paulsw...@gmail.com wrote: 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. :-) With Arduinos going for well under $10 You could afford to place one Aruino INSIDE your test instrument. Those old instruments usually have some air space inside and a power supply suitable for an Arduino. Now you have added a USB port to some 1980's vintage test gear. If the Arduino is inside you may not even need the GPIB connector.You could do this to many older instruments then use USB to a USB hub, then to a computer. -- Chris Albertson Redondo Beach, California ___ 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.
Re: [time-nuts] Arduino GPIB
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.
[time-nuts] Arduino GPIB
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.
