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Re: [Usbpicprog-technical] PIC 16F628A
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From: Frans S. <fra...@gm...> - 2013-04-25 13:22:13
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I use the MBRL0520 (500mA, 300mV Vf) I don't know any equivalent through hole version but you can probably find it yourself. If you are not using an external power supply for your target chip, you can also just short the diode. Frans On 25-4-2013 15:13, ShadowCaster wrote: > Do you have any specific model for the VDD diode to propose? Something > like 1N5822RL or 1N5817 will be acceptable? > > > On Thu, Apr 25, 2013 at 3:44 PM, Frans Schreuder > <fra...@gm... <mailto:fra...@gm...>> wrote: > > Yes you can just replace D4 with a wire, there are no problems if > you do that. > Also it is smart to replace the diode which is in series with VDD > with a low drop shottky diode. > > On 25-4-2013 14:40, ShadowCaster wrote: >> Hello Frans, >> >> Probably you didn't receive my previous e-mail due to the >> attached picture, >> >> VDD is almost perfect 5V if i remember correctly. >> >> Can i change the D4 on my current board without any other side >> effects or there are more changes needed ? I printed a board >> based on your through hole schematics so if there are more >> changes involved probably there will be difficult to implement. >> >> Regards, >> Nick >> >> >> On Wed, Apr 24, 2013 at 9:22 PM, Frans Schreuder >> <fra...@gm... <mailto:fra...@gm...>> wrote: >> >> Hello Nick, >> >> The voltage is on the low side. For this reason, in the new >> schematic, D4 has been replaced by a 0R resistor (or a wire). >> Have you also measured VDD? >> >> Kind regards, >> >> Frans Schreuder >> >> >> On 04/24/2013 07:54 PM, Nick wrote: >>> Hello Frans, >>> >>> I measured the voltage between VPP and GND using a >>> multimeter in the pic pins, it is 12.21V. I assume that this >>> is not enough for programing the 628A? >>> >>> On 24/4/2013 3:46 ??, Frans Schreuder wrote: >>>> The io_test function is good for an indication, but not >>>> very accurate in voltage. Using a multimeter is a better >>>> option. >>>> >>>> On 24-4-2013 13:58, ShadowCaster wrote: >>>>> Hello Frans, >>>>> >>>>> Thanks for your quick reply i'll double check the voltages >>>>> but i think that VPP is 11.4 to 12.3 when i try the I/O >>>>> test function in the software, i'll connect the programmer >>>>> with the pic and check with a multimeter and the I/O test >>>>> function. >>>>> >>>>> >>>>> On Wed, Apr 24, 2013 at 2:26 PM, Frans Schreuder >>>>> <fra...@gm... >>>>> <mailto:fra...@gm...>> wrote: >>>>> >>>>> Dear Nick, >>>>> >>>>> The 16F628A PIC does work with the current software / >>>>> firmware, although this pic is very selective when it >>>>> comes to operating voltages. >>>>> Please verify that VDD > 4.5V and VPP >13V with the >>>>> pic connected. >>>>> >>>>> Regards, >>>>> >>>>> Frans >>>>> >>>>> >>>>> On 24-4-2013 13:22, ShadowCaster wrote: >>>>>> Hello, >>>>>> >>>>>> I implemented the programmer based on the designs and >>>>>> it works flawlessly with a PIC 18F2550 and a 18F1320. >>>>>> The thing is that i tried to program a 16F628A that >>>>>> should be compatible, although it is properly >>>>>> detected it doesn't write any data to it. When i read >>>>>> it i get a repeated pattern : FF 3F FF 3F. >>>>>> >>>>>> I tried the same pic with a old serial programmer and >>>>>> it is written without a problem so it is not a pic >>>>>> problem >>>>>> >>>>>> I tried both the latest stable as well as the latest >>>>>> devel firmware/software. Is the functionality for >>>>>> this model broken in the latest versions? Can >>>>>> somebody verify? >>>>>> >>>>>> Regards >>>>>> Nick >>>>>> >>>>>> >>>>>> ------------------------------------------------------------------------------ >>>>>> Try New Relic Now & We'll Send You this Cool Shirt >>>>>> New Relic is the only SaaS-based application performance monitoring service >>>>>> that delivers powerful full stack analytics. Optimize and monitor your >>>>>> browser, app, & servers with just a few lines of code. Try New Relic >>>>>> and get this awesome Nerd Life shirt!http://p.sf.net/sfu/newrelic_d2d_apr >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> Usbpicprog-technical mailing list >>>>>> Usb...@li... <mailto:Usb...@li...> >>>>>> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical >>>>> >>>>> >>>>> ------------------------------------------------------------------------------ >>>>> Try New Relic Now & We'll Send You this Cool Shirt >>>>> New Relic is the only SaaS-based application >>>>> performance monitoring service >>>>> that delivers powerful full stack analytics. Optimize >>>>> and monitor your >>>>> browser, app, & servers with just a few lines of code. >>>>> Try New Relic >>>>> and get this awesome Nerd Life shirt! >>>>> http://p.sf.net/sfu/newrelic_d2d_apr >>>>> _______________________________________________ >>>>> Usbpicprog-technical mailing list >>>>> Usb...@li... >>>>> <mailto:Usb...@li...> >>>>> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical >>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> When a man lies, he murders some part of the world.. >>>>> These are the pale deaths which men miscall their lives.. >>>>> All these I cannot bear to witness any longer.. >>>>> Cannot the kingdom of salvation take me home? >>>>> >>>>> >>>>> ------------------------------------------------------------------------------ >>>>> Try New Relic Now & We'll Send You this Cool Shirt >>>>> New Relic is the only SaaS-based application performance monitoring service >>>>> that delivers powerful full stack analytics. Optimize and monitor your >>>>> browser, app, & servers with just a few lines of code. Try New Relic >>>>> and get this awesome Nerd Life shirt!http://p.sf.net/sfu/newrelic_d2d_apr >>>>> >>>>> >>>>> _______________________________________________ >>>>> Usbpicprog-technical mailing list >>>>> Usb...@li... <mailto:Usb...@li...> >>>>> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical >>>> >>>> >>>> >>>> ------------------------------------------------------------------------------ >>>> Try New Relic Now & We'll Send You this Cool Shirt >>>> New Relic is the only SaaS-based application performance monitoring service >>>> that delivers powerful full stack analytics. Optimize and monitor your >>>> browser, app, & servers with just a few lines of code. Try New Relic >>>> and get this awesome Nerd Life shirt!http://p.sf.net/sfu/newrelic_d2d_apr >>>> >>>> >>>> _______________________________________________ >>>> Usbpicprog-technical mailing list >>>> Usb...@li... <mailto:Usb...@li...> >>>> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical >>> >>> >>> >>> ------------------------------------------------------------------------------ >>> Try New Relic Now & We'll Send You this Cool Shirt >>> New Relic is the only SaaS-based application performance monitoring service >>> that delivers powerful full stack analytics. Optimize and monitor your >>> browser, app, & servers with just a few lines of code. Try New Relic >>> and get this awesome Nerd Life shirt!http://p.sf.net/sfu/newrelic_d2d_apr >>> >>> >>> _______________________________________________ >>> Usbpicprog-technical mailing list >>> Usb...@li... <mailto:Usb...@li...> >>> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical >> >> >> ------------------------------------------------------------------------------ >> Try New Relic Now & We'll Send You this Cool Shirt >> New Relic is the only SaaS-based application performance >> monitoring service >> that delivers powerful full stack analytics. Optimize and >> monitor your >> browser, app, & servers with just a few lines of code. Try >> New Relic >> and get this awesome Nerd Life shirt! >> http://p.sf.net/sfu/newrelic_d2d_apr >> _______________________________________________ >> Usbpicprog-technical mailing list >> Usb...@li... >> <mailto:Usb...@li...> >> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical >> >> >> >> >> -- >> When a man lies, he murders some part of the world.. >> These are the pale deaths which men miscall their lives.. >> All these I cannot bear to witness any longer.. >> Cannot the kingdom of salvation take me home? >> >> >> ------------------------------------------------------------------------------ >> Try New Relic Now & We'll Send You this Cool Shirt >> New Relic is the only SaaS-based application performance monitoring service >> that delivers powerful full stack analytics. Optimize and monitor your >> browser, app, & servers with just a few lines of code. Try New Relic >> and get this awesome Nerd Life shirt!http://p.sf.net/sfu/newrelic_d2d_apr >> >> >> _______________________________________________ >> Usbpicprog-technical mailing list >> Usb...@li... <mailto:Usb...@li...> >> https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical > > > ------------------------------------------------------------------------------ > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance > monitoring service > that delivers powerful full stack analytics. Optimize and monitor your > browser, app, & servers with just a few lines of code. Try New Relic > and get this awesome Nerd Life shirt! > http://p.sf.net/sfu/newrelic_d2d_apr > _______________________________________________ > Usbpicprog-technical mailing list > Usb...@li... > <mailto:Usb...@li...> > https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical > > > > > -- > When a man lies, he murders some part of the world.. > These are the pale deaths which men miscall their lives.. > All these I cannot bear to witness any longer.. > Cannot the kingdom of salvation take me home? > > > ------------------------------------------------------------------------------ > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance monitoring service > that delivers powerful full stack analytics. Optimize and monitor your > browser, app, & servers with just a few lines of code. Try New Relic > and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr > > > _______________________________________________ > Usbpicprog-technical mailing list > Usb...@li... > https://lists.sourceforge.net/lists/listinfo/usbpicprog-technical |
