Igor and Otto
By Dermot Tynan, over 11 years ago.
The Kalopa motor control board was designed as a general-purpose Atmel board with ancillary electronics for a wide variety of purposes. It includes two H-Bridge motor controllers, driven by two 16 bit PWM outputs. You can exchange one of the motor controllers for an 8-channel servo controller, also using one of the PWM outputs. It has a standard RS232 port with an RJ45 connector on the end. There is a MAX232 to convert logic levels to proper RS232 voltages. If you want to use radio control, you can instead populate the board with an R5-434 radio receiver. It will listen for data on 434MHz and feed it to the Atmel. The processor itself is the bog-standard Atmel ATmega8 with 8k of code and about 512 bytes of RAM.
Hello to the Little Red Daemon
By Dermot Tynan, over 11 years ago.
After much tweaking and hacking with configuration files and kernel build options, I finally have a FreeBSD 8.3-RELEASE kernel and install running on a Wrap board. Technically, it's NanoBSD, which is a scaled-down FreeBSD install, which boots from Compact Flash. The WRAP board is the PC Engines forerunner to the ALIX. When National Semiconductor and AMD stopped making Geode chips, the guys at PC Engines had to stop making their very popular WRAP board. I still have a few of them tucked away, for emergencies such as this.
I love it when a Plan comes together...
By Dermot Tynan, over 11 years ago.
The new ALIX board has arrived. It's to the left of the picture, sitting on top of a copy of the Lyon's Notes (which is appropriate). It's running my custom version of NanoBSD quite nicely, and can see the GPS without any difficulty. The GPS unit is a BU-353 unit (the USB version) which is out of the shot. It's attached to the window, and gazing at the man-made stars. To give a breakdown of what's in that photograph, the ALIX is on the left. In the USB port is the GPS, the RS-232 cable at the top of the board is communicating with my development machine (running FreeBSD). The red CAT5 cable is connecting the board to the "house network." The Atheros CM9 radio is a miniPCI card mounted on the underside of the board. It works on 5.8GHz and on 2.4GHz. In this case, I'm using 5.8GHz because (apparently) it has better cross-water characteristics and the band isn't as crowded. The mini coax cable is at the top-left of the picture, connected to a short, 9dBi antenna. You can also see a 12v cable with barrel plug. At the top-right of the picture is a WRAP board, also developed by PC Engines. It was being used as a testbed for the operating system, but that is no longer needed thanks to the ALIX.
Upcoming Missions
- Galway Bay Loop, Waiting for Vessel Availability
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