Design of wearable battery powered online gps tracker

Design of tiny wearable GPS tracker

Overall goal:

- Design of wearable-, battery powered-, internet connected- gps tracker.

Design guidelines (in order of importance):

1. Smallest possible PCB size.

2. Good battery life (power efficient components).

3. Cheap component list (BOM).

Required functionality:

- Power supply circuit for running device off battery power.

- LiPo battery charging circuit for charging connected LiPo battery from charging pins.

- On board MCU with at least 32Kb flash and >= 2Kb SRAM (mega32u4?).

- Integrated GPRS modem module (SIM800/SIM900?).

- Integrated GPS module (ublox-6?/SIM900?).

- Small GSM antenna connector on PCB.

- Small GPS antenna connector on PCB.

- On/off button for battery power.

- 3 external pins available for network status LEDs, controllable by MCU.

- 2 external pins available for charging status LEDs, controlled automatically by LiPo charging circuit.

- PCB mounting holes.

Required electrical interfaces:

- On board micro USB host interface. Used for charging LiPo battery

and communicating with device firmware.

- JST connector for replacable LiPo battery.

- JTAG connector for debugging system firmware.

- ISP connector for programming MCU.

- Charging pins for +5V to charge LiPo battery.

- UART interface for debugging.

- (standard) SIM card holder.

Maximum PCB size:

- 35mmx35mm or smaller if possible.


- Design of PCB.

- 5x prototype PCB including components and postage to supplied address in Sweden.

- Source files (board layout, schematics).

The PCB shall bascially be a combination of these 3 olimex boards in one custom PCB:

- [url removed, login to view]

- [url removed, login to view]

- [url removed, login to view]

Another link for inspiration:

- [url removed, login to view]

Habilidades: Electrónica, Ingeniería

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Información del empleador:
( 1 comentario ) Gothenburg, Sweden

Nº del proyecto: #6738769

Adjudicado a:


Over 12 years of experience in electronics hardware and software design. Proficient in software and hardware design of embedded systems. Successful in planning and management of entire development and production cycl Más

kr11111 SEK en 180 días
(10 comentarios)

2 freelancers están ofertando el promedio de kr85556 para este trabajo


Hello.. I developed gps tracking devices before. But they were kinda larger than this. Can develop this for you in 1 month. What is the acceptable weight for you?

kr160000 SEK en 130 días
(6 comentarios)