• 3x AAA batteries for power
The brains behind the Roshamglo is an ATtiny84, a light weight Arduino
compatible microcontroller. The ATtiny84 comes with the following:
• 8kB of flash memory for our program (~6kB after the bootloader is
installed)
• 512B of SRAM, which stores our variables used in our program
• 512B of EEPROM
• 12 IO pins MAX (the Roshamglo breaks out 9 of these pins)
• 10-bit analog to digital converter which can be used on 8 pins
For details about what each pin is able to do, refer to the table below.
Pin
Analog or Digital
Additional Uses
Roshamglo Uses
0
Both
Analog Reference
5-way switch down
1
Both
--
5-way switch right
2
Both
--
5-way switch up
3
Both --
IR
Receiver
4
Both
SCK, SCL
5-way switch left
5
Both MISO,
PWM
IR
LED
6
Both
MOSI, SDA, PWM
5-way switch center
7
Both PWM
Green
LED
8
Digital PWM
Red
LED
Missing from the list, are digital pins 9 and 10. The bootloader,
uses these two pins for USB programming.
Each of these pins have been broken out to edge of the board to make
customization easy! If you would like to use any of these pins for something
other than what it’s currently connected two, we provided jumpers that can
easily be cut with a hobby knife. The only pins that do not have a jumper on
them are the pins used for the 5-way switch. The pins for the switch use the
ATtiny’s internal pull up resistors, so as long as the switch is not closed, the
pin can be configured in any way you’d like without having to cut traces.
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