Teeny Tiny

Data logger using Atmel Tiny85

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I am trying to design a board using Atmels' Tiny85. As a secondary goal, I'm going to try to cram as much as I can unto it.

(The accompanying image is a rough first draft)

In order to be a worthwhile device to log any sort of data, it will need a few properties:

1. Data storage (EEPROM or µSD)

2. Power Management (Battery and/or solar)

3. RTC for timestamping

In an effort to make it easy/cheap to fabricate:

1. Limit to 4 layers (preferably 2)

2. No custom parts (except PCB)

3. Limit the number of very small parts (eg 0402 components).

In an effort to make environmentally safe:

1. Use only RoHS components/techniques

2. No lead/halides or other dangerous chemicals

  • 1 × ATtiny85 Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
  • 1 × TPS63060 Power Management ICs / Switching Regulators and Controllers
  • 1 × MCP73831 Power Management ICs / Power Supply Support
  • 1 × DS1307 I2C compatable Real-Time-Clock (RTC).
  • 1 × JST Vertical Connector Connector for Battery

View all 6 components

  • Second Log

    davidedwardlivermore11/06/2015 at 01:04 0 comments

    Still working out some of the details for the circuit. Currently working out the best way to get the data off of EEPROM (if I go that route). I'm inclined to use EEPROM over uSD simply because the I2C interface on the Tiny allows me to operate a few other things (such as power management).

    Any thoughts?

  • First Log Entry

    davidedwardlivermore11/02/2015 at 01:59 0 comments

    Doing a few things at the moment:

    1. Prototyping what I can (which is limited since I don't have a working ATtiny, just an Arduino).

    2. Reconsidering the DC power jack in favour of a voltage regulator and a couple pins; the power jack takes up a LOT of real estate.

    3. Looking through SparkFun and DigiKey to order some parts.

View all 2 project logs

Enjoy this project?



alpha_ninja wrote 11/06/2015 at 16:00 point

Hi! You could probably enter #The Square Inch Project with this if you'd like to :)

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