USBtinyISP: Replace R4/R7 with jumpers? http://makerbot.wikidot.com/forum/t-153686/usbtinyisp:replace-r4-r7-with-jumpers Posts in the discussion thread "USBtinyISP: Replace R4/R7 with jumpers?" Tue, 11 Aug 2026 23:27:39 +0000 http://makerbot.wikidot.com/forum/t-153686#post-470149 Re: USBtinyISP: Replace R4/R7 with jumpers? http://makerbot.wikidot.com/forum/t-153686/usbtinyisp:replace-r4-r7-with-jumpers#post-470149 Wed, 06 May 2009 00:01:50 +0000 mikevalstar 304271 hmmmm I did not need to do that. that is to say I dident have to jumper anything

]]> http://makerbot.wikidot.com/forum/t-153686#post-470022 Re: USBtinyISP: Replace R4/R7 with jumpers? http://makerbot.wikidot.com/forum/t-153686/usbtinyisp:replace-r4-r7-with-jumpers#post-470022 Tue, 05 May 2009 21:49:16 +0000 tamberg 317499 Burning the Sanguino bootloader works now with jumpers i.e. without R4/R7. The solution was to add another jumper at J3 (the white angle headers) to power the target as described in http://www.ladyada.net/make/usbtinyisp/use.html

Regards,
tamberg

]]> http://makerbot.wikidot.com/forum/t-153686#post-470010 USBtinyISP: Replace R4/R7 with jumpers? http://makerbot.wikidot.com/forum/t-153686/usbtinyisp:replace-r4-r7-with-jumpers#post-470010 Tue, 05 May 2009 21:35:01 +0000 tamberg 317499 http://www.ladyada.net/make/usbtinyisp/solder.html states that "If you're not using the USBtiny to talk to a SpokePOV kit, and if you are using a target that has some load on the SCK and MOSI pins, you may need to replace R4 and R7 with jumpers as the 1.5K resistors will have trouble driving the load!"

What does that mean for the Sanguino motherboard? (tried both, no success)

Regards,
tamberg

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