BOOTLOADERHID optional download bootloadhid last version This bootloader doesn’t require a driver it’s HID . With it, you will be able to program your firmware without your programmer..In this tutorial we will have an Arduino microcontroller with Java emulation to turn on the LED for us..One guy at Hack a Day remarked on the long wire runs in my V USB tutorial breadboard setup. So I thought I’d build upon the part of the tutorial but modify the setup a bit to run the AVR at volts and use zener diodes to drop D D voltage, thus eliminating the need for a regulator. And why not stop there. ATtiny and ATtiny are smaller than ATtiny and have an internal oscillator .