Thursday, June 26th, 2008
Strobit M8 by Jan Gentsch
All the design files and software are now available online for Jan Gentschs M8 Triggr Implementation.
Files can be found here.
No Comments » - Posted in EbayTrigger, RF, rfm12, strobist by Stephen Eaton
Monday, June 23rd, 2008
RFM12B Bit Rates and Throughput
During the prototyping of the StrobIt Triggr, I found that I could only hit the maximum bit rate of approx 12000bps, this is a far cry from the reported 256Kbps, so what was I doing wrong?
2 Comments » - Posted in Embedded, RF, RFM12B, Tutorials, rfm12 by Stephen Eaton
Tuesday, June 17th, 2008
RFM12 Tutorial - Part2
Part 2 - RFM12 Hardware Interface
In this next part of the RFM12 tutorials I’ll be covering the hardware interface, signal descriptions and how you go about hooking it up to the MCU of your choice.
13 Comments » - Posted in Embedded, RF, Tutorials, rfm12 by Stephen Eaton
Tuesday, January 8th, 2008
RFM12 Tutorial - Part1
During the development of the StrobIt Open Trigger Project I’ve been using the HopeRF RFM12B Tranceiver as the RF module. The learning curve was fairly steep so I’ve decided to create a series of How-To articles so that others can easily get the module up and running fairly quickly for their project of choice. [...]
10 Comments » - Posted in Embedded, PIC, RF, Tutorials, rfm12 by Stephen Eaton
Monday, November 26th, 2007
PIC, SPI and the RFM12
I finally had some time this weekend so I started the hardware verification, mainly getting the PIC and the RFM talking together via SPI, of which I have had no previous experience.  The PIC is receiving it’s clock source from the RFM12 via the CLK pin so I dont need any external Xtals. The RFM12 default clock rate [...]
3 Comments » - Posted in C, EbayTrigger, Embedded, PIC, RF, strobist by Stephen Eaton
Tuesday, November 20th, 2007
RFM12 Prototype Board
The RFM12 module is a pain to prototype with due to the 2mm header (won’t fit into the breadboard), so I’ve whipped up a prototyping board that brings out the pins to a standard header. It’s been it sent off for fabrication today so I should have back in the next week or so.  I’m trying out www.batchpcb.com for [...]
No Comments » - Posted in Eagle, Embedded, RF by Stephen Eaton
Monday, November 19th, 2007
Frequency Hopping
As mentioned in my last entry I was toying with the idea of frequency hopping on the RF side of things, well looks like someone has implemented something similar here http://www.raccoonrezcats.com/rfmodem.html I’ll like to do something similar to this as it seems doable.Â
While not able to get some “hands on” development time over the weekend, I did [...]
No Comments » - Posted in EbayTrigger, RF by Stephen Eaton
Friday, November 16th, 2007
More challenges but getting there
Trying to fit the functionality into the existing ebay trigger receiver housing seems to be a royal pain in the butt, especially trying to work in with the batteries, so after a few days of PCB redesigns and juggling compments around I have put that particular design on hold and moved forward with my original PIC16F873A [...]
