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DEVICE FACTORY

We like to experiment, learn, and create.

DF1

DF1 is the first FCC certified production device from Device Factory. The unit contains a 3-axis accelerometer connected to a micro controller that can communicate via Bluetooth Low Energy to a base station. The device, in conjunction with a base station (such as a phone, tablet or computer), provides an open source platform for the user to develop applications and products. Source code is available on GitHub and support is available on the Forums.

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$50.00

Specifications

G-Force: 3 axis ±2/4/8G

Max Range: 250ft

Battery: CR2032 Lithium-Ion 3.0V

Battery Life: 3 years standby, 3 months active

Weight: 22gm

Diameter: 1.4in (35.56mm)

Height: 0.38in (9.652mm)

COMPONENTS

df1-product-components

DF1-OEM

DF1-OEM

DF1-HONEYCOMB

DF1-CIRCUIT

DF1-TRAPEZOID

Base Station

The base station is any computer with a Bluetooth Low Energy (4.0) capability.  Software must be installed to communicate with the DF1 device.  This can be either the demo applications provided on GitHub, or they can be coded by the user.

  • IOS Devices: iPhone, iPod, iPad
  • Android devices: Phones, Tablets
  • RaspberryPi with a Bluetooth 4.0 dongle
  • Any PC with with Bluetooth 4.0 support

Hardware

DF1 uses a Ti CC2541 power optimized true system-on-chip (SoC) solution for Bluetooth Low Energy applications. The CC2541 combines the excellent performance of a leading RF transceiver with an industry-standard enhanced 8051 MCU, in-system programmable flash memory, 8-KB RAM, and many other powerful supporting features and peripherals. The CC2541 requires 2 clock sources for internal timing of application and radio: XTAL1 32MHz provides the main clock source, XTAL2 32.678kHz acts as the auxiliary clock source.

All components are surface mounted to the PCB. The PCB is double sided, and both sides contain the ground plane. The ground plane not only serves as an electrical ground against the battery, but also as a counterpoise for the monopole chip antenna.

  • 2.4-GHz Bluetooth Low Energy Compliant RF System-on-Chip
  • Supports 250Kbps, 500Kbps, 1Mbps, 2Mbps Data Rates
  • High-Performance and Low-Power
  • 8051 Microcontroller Core With Code Prefetch
  • In-System-Programmable 256KB Flash

Antenna

The DF1 device includes a monopole chip antenna inside the enclosure.  Radio modulation is done within the Main IC which is then sent though a Murata chip Balun bandpass filter, and then onto the chip antenna.  This antenna is designed to work with Bluetooth devices operating in the 2.4GHz frequency band for radio communication.

  • Frequency: 2.45GHz
  • Bandwidth: 180MHz
  • Wavelength: 1/4-wave
  • Impedance: 50Ω
  • VSWR at Center: ≤2.0

Enclosure

Injection molded ABS plastic with light pipe for LED emission. A relief cut around the circumference allows for an attachment clip interface.  The flat surface on back of enclosure allows for mounting via 0.75 inch 3M Dual Lock disc.  Enclosure is not waterproof.  Our GitHub features 3D printable accessories for DF1 that you are free to download, modify, and print.

Operation

The DF1 device relies entirely on remote control via Bluetooth Low Energy protocols. The user interacts with the device using Bluetooth capable devices such as SmartPhones, Tablets, or PC’s.  There is no physical on/off switch on the device.  No external power source is needed.  The device is entirely battery operated and is meant to be portable.