Digispark

Boots a compiled public-domain ATtiny85 program on a Digispark board. The whole board surface is LEDs: the built-in LED on P1 (the mass-produced Model B / rev3) and the broken-out pins P0-P5. Ships four original public-domain bare-metal programs: Blink (the onboard LED), Soft-PWM fade (the onboard LED breathing up and down in brightness via software PWM), Knight Rider (a lit LED chasing across P0-P4), and Timer0 blink (a hardware-timer CTC compare-match interrupt toggling the onboard LED). There are no buttons on a bare Digispark, so the only control is Reset. Open the debugger to single-step the ATtiny85, read/write R0-R31/SP/PC/SREG, watch the I/O registers, set breakpoints and write-watchpoints. Click the panel first so it captures the keyboard (R = reset).

Boots a compiled public-domain ATtiny85 program on a Digispark board. The whole board surface is LEDs: the built-in LED on P1 (the mass-produced Model B / rev3) and the broken-out pins P0-P5. Ships four original public-domain bare-metal programs: Blink (the onboard LED), Soft-PWM fade (the onboard LED breathing up and down in brightness via software PWM), Knight Rider (a lit LED chasing across P0-P4), and Timer0 blink (a hardware-timer CTC compare-match interrupt toggling the onboard LED). There are no buttons on a bare Digispark, so the only control is Reset. Open the debugger to single-step the ATtiny85, read/write R0-R31/SP/PC/SREG, watch the I/O registers, set breakpoints and write-watchpoints. Click the panel first so it captures the keyboard (R = reset).

Boots a compiled public-domain ATtiny85 program on a Digispark board. The whole board surface is LEDs: the built-in LED on P1 (the mass-produced Model B / rev3) and the broken-out pins P0-P5. Ships four original public-domain bare-metal programs: Blink (the onboard LED), Soft-PWM fade (the onboard LED breathing up and down in brightness via software PWM), Knight Rider (a lit LED chasing across P0-P4), and Timer0 blink (a hardware-timer CTC compare-match interrupt toggling the onboard LED). There are no buttons on a bare Digispark, so the only control is Reset. Open the debugger to single-step the ATtiny85, read/write R0-R31/SP/PC/SREG, watch the I/O registers, set breakpoints and write-watchpoints. Click the panel first so it captures the keyboard (R = reset).

Boots a compiled public-domain ATtiny85 program on a Digispark board. The whole board surface is LEDs: the built-in LED on P1 (the mass-produced Model B / rev3) and the broken-out pins P0-P5. Ships four original public-domain bare-metal programs: Blink (the onboard LED), Soft-PWM fade (the onboard LED breathing up and down in brightness via software PWM), Knight Rider (a lit LED chasing across P0-P4), and Timer0 blink (a hardware-timer CTC compare-match interrupt toggling the onboard LED). There are no buttons on a bare Digispark, so the only control is Reset. Open the debugger to single-step the ATtiny85, read/write R0-R31/SP/PC/SREG, watch the I/O registers, set breakpoints and write-watchpoints. Click the panel first so it captures the keyboard (R = reset).