X893

Update: Now you can pre-order here https://www.indiegogo.com/projects/arduino-gps-gsm-anytracer New version of small form-factor GPS/GSM tracker. Real positions available as Public on test site. Change MCU to EFM32 increase standalone time (previous version use STM32 MCU) Also change old BMA180 to MMA8562 and add 32Mbit (4MB) flash chip to save data if GSM not available or battery low. Use MS Azure platform for web site and service for collect data from trackers. Based now on GL865 but with Fibocom GSM dimensions reduce from 24x24 to 24x18 mm (GPS antenna size 15x15 on my hand) Now check various...

Vehicle tracker with schematics and software. Updated: Cx version support direct connection GPS to GSM via wires (or change layout) so you can use buildin Python to implement tracker functions without STM32 MCU . Updated: Links to OSH Park pcb service Cx version Rx version Features: STM32 48/64 pins (F10X, F20X, F40X, L151) GSM Telit GL685/GL868 GPS/GLONASS SL868/SL869 Accelerometer MMA7455 CAN bus (need MCU with CAN support) 2 input, 1 output signal Standard SIM or SimOnChip Only for 48 pins version Side connector for extension pcb Only for 64 pins version Battery support with charger USB support...

Simple dual power supply with TFT screen, bluetooth and control current and voltage. Millions thanks to http://www.maximintegrated.com/ for samples. Now it best company for sample (second TI :) ). One control board and up to 2 power supply board. and power supply based on Maxim (regulator+control+measure) all PCBs size 33x32 mm (only TFT display more but with Bluetooth control it no need) With 3 button easy to control without host All PCB connects as sandwich so i have a small cube with 33x32x30 mm for dual power with measurement and regulate dual voltage supply. Now too easy make a consumption...

Simple battery monitor - free hands and no need tester. Simple and funny device for fast control battery. 4 LED for 4 voltage levels. 3.2V 3.5V 3.8V amd 4.0V Easy connect to battery and see voltage level and connect to device and see level during works Simple Excel screen for calculation resistors for voltage levels...

Simple PCB for CMSIS-DAP debug adapter. Additional serial (UART) interface. Compatible with Keil ARM. Available on Github (Eagle files and codes). Provide USB HID (for debug) and USB Serial (for messages) on STM32F103C8 chip.

First post about small device for home automation and meerkats control station. Test only with RFM22B and STM32F103CB. https://github.com/x893/EzMacPro32 Now device photo and complete in a box Now i use STM32L151 (5-6uA in sleep mode) but also test EFM32 (2 uA sleep). Ported EzMacPro stack provide P2P network (many base stations with many end-devices) or star (single base station) network. I plan use for home automation, simple car show control system and for wild animal control application. Build-in accelerometer provide device self control for movement (legal or not). Together with microSD device...

BusPirate Console. Source code available on GitHub

Now easy to production. This China reflow start now with vehicle tracker schematic available After one week after works...

I use RSTERM software from roundsultions for programming Telit modules (GE863, GE865, GM862). But this program don't work with budget CP2102 USB-serial convertor. This simplest terminal program works with serial port via serial port class from .NET framework. Source codes available at github...

Time to time i need prepare small C program for testing hardware so not need write a complex program with host compilation. So i port small C interpreter to EFM32. Very helpfull for me. Now use USART1 to communicate. Need ~ 45Kb flash and 2K RAM. All other flash/ram used for interpreter (or as small file storage). Target MCU reset Enter program code Call function See result After add wrappers to hardware modules i can easy call various interfaces. See original project here http://code.google.com/p/picoc/ Modified source code available on github . Open Keil project from ports/picoC.uvproj...