OpenSprinkler › Forums › Hardware Questions › DIY Kit Assembly Questions › 1.2u Mar 2012 diy build › Re: Re: 1.2u Mar 2012 diy build June 13, 2013 at 1:47 am #23838 RayKeymaster No it shouldn’t. The ATtiny is programmed to function as a USBtiny programmer. You don’t need it if you have an external ISP programmer to directly flash a program to ATmega328.
