KiCad-ATMega-Board

Public

Loading…

README

ATMega Board

The usual Arduino boards like the Arduino Uno , Nano, Mini etc. are only conditionally suitable for battery operation.

The current requirement of the built-in LEDs, the USB-UART interface and the quite high quiescent current of the LDO regulator is too high for a longer operation on a battery, even if the microcontroller is in sleep mode.

On the ATMega board only the most necessary components are installed, which are necessary for the operation of a microcontroller. This makes it possible to operate the controller with batteries for a longer time. The screw terminals allow stable and trouble-free connections with external components.

With the help of a jumper the power indicator LED (consumes about 3mA) can be switched on or off as needed.

Limitations compared to the usual Arduino boards

Programming must be done via the ISP adapter.
For serial communication an external FTDI adapter is required.
The analog ports A6 and A7 (e.g. compared to an Arduino Nano) are not available.
No 3.3V output. But you can use the whole board instead of a 5V LDO with a 3.3V LDO (MCP-1703-3302MB or HT7833-1).

Other technical data

Usable microcontrollers: ATTiny88, ATmega48A/PA, 88A/PA, 168A/PA, 328/P
The crystal is exchangeable (depending on the inserted microcontroller max. 20Mhz)
Supply voltage via JST XH connector or VIN-Pin min. 6V, max. 15V
Max. 200mA current load (the LDO has a limit of 250mA, the AVR controllers 200mA.)
Power consumption with an ATMega328P in sleep mode "SLEEP_MODE_PWR_DOWN" and disabled ADC < 10µA

Circuit diagram as PDF file

Sheet

The PCB

Comments

No comments yet. Be the first to ask about this board.

ATMega Board

The usual Arduino boards like the Arduino Uno , Nano, Mini etc. are only conditionally suitable for battery operation.

With the help of a jumper the power indicator LED (consumes about 3mA) can be switched on or off as needed.

Limitations compared to the usual Arduino boards

Programming must be done via the ISP adapter.

For serial communication an external FTDI adapter is required.

The analog ports A6 and A7 (e.g. compared to an Arduino Nano) are not available.

No 3.3V output. But you can use the whole board instead of a 5V LDO with a 3.3V LDO (MCP-1703-3302MB or HT7833-1).

Other technical data

Usable microcontrollers: ATTiny88, ATmega48A/PA, 88A/PA, 168A/PA, 328/P

The crystal is exchangeable (depending on the inserted microcontroller max. 20Mhz)

Supply voltage via JST XH connector or VIN-Pin min. 6V, max. 15V

Max. 200mA current load (the LDO has a limit of 250mA, the AVR controllers 200mA.)

Power consumption with an ATMega328P in sleep mode "SLEEP_MODE_PWR_DOWN" and disabled ADC < 10µA

Circuit diagram as PDF file

The PCB

KiCad-ATMega-Board

Share KiCad-ATMega-Board

ATMega Board