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Arduino Ask Engineering

Problem burning bootloader to ATMega32U4-MU (is the schematic correct?)

I designed a very simple 4*3 keypad system controlled by an ATMega32U4-MU MCU, using Adafruit’s Itsy-bitsy 32U4 as reference (attached is the schematic of my circuit, while Adafruit’s circuit can be found at https://learn.adafruit.com/assets/49818). There is a 16 MHz oscillator on board (FA-20H 16.0000MF10Z-AJ0) with 22pF caps. To program the bootloader, I am trying to […]

Categories
Arduino Ask Engineering

Problem burning bootloader to ATMega32U4-MU (is the schematic correct?)

I designed a very simple 4*3 keypad system controlled by an ATMega32U4-MU MCU, using Adafruit’s Itsy-bitsy 32U4 as reference (attached is the schematic of my circuit, while Adafruit’s circuit can be found at https://learn.adafruit.com/assets/49818). There is a 16 MHz oscillator on board (FA-20H 16.0000MF10Z-AJ0) with 22pF caps. To program the bootloader, I am trying to […]

Categories
Arduino Ask Engineering

Problem burning bootloader to ATMega32U4-MU (is the schematic correct?)

I designed a very simple 4*3 keypad system controlled by an ATMega32U4-MU MCU, using Adafruit’s Itsy-bitsy 32U4 as reference (attached is the schematic of my circuit, while Adafruit’s circuit can be found at https://learn.adafruit.com/assets/49818). There is a 16 MHz oscillator on board (FA-20H 16.0000MF10Z-AJ0) with 22pF caps. To program the bootloader, I am trying to […]