For kicks, we tore down a popular BTLE (Bluetooth smart) module, the RF Digital RFD22301, which is based on the nRF51822. Pretty straightforward layout; wished they'd broken out a few more I/O. Note that the metal can has been removed.
They use a fractal-style antenna ... for cost savings, I'm not sure why they didn't go with an IFA, or maybe even a PIFA.
Posted by: Lab Coat
| @ September 2, 2014 2:48:48 PM CDT ( ) |
Saw this at some big chain store recently, so I decided to buy one ($39) and tear into it. Uses a TI CC2541 based BLE module from ILOGICTECH ...and they may or may not have written the App (Perfect App in the iTunes App store) that goes with this accessory. Not the sleekest design, nor the best app, but for 40 bucks, it's okay. Assembly of the unit and build quality of the board is average.
Not pictured was the small 9 conductor ribbon cable between the main board and the LCD board. This unit also has a small E2PROM for 14 days worth of data storage, and a small 3 axis accelerometer (part making BOM7A ... looks to be I2C comms).
Front (with small backlit LCD.) 
One side ... 
The other side ... 
Inside ... 
Posted by: Lab Coat
| @ July 5, 2014 3:41:48 PM CDT ( ) |
Since I published the Nordic Smart Beacon, I thought I'd show off what we've been playing with for the past 9 months or so. We've used this same design to do various types of demo sensors. The unit pictured is of a Sensiron SHT21 humidity sensor interfaced to the nRF51822.
Posted by: Lab Coat
| @ July 1, 2014 4:50:36 PM CDT ( ) |
Purchased these a few weeks ago, and have been toying with them. Nice.
Posted by: Lab Coat
| @ July 1, 2014 4:46:44 PM CDT ( ) |
Finally found a nice, gently used, RF current probe. FCC makes some of the best kit out there, and I'm happy to have found this unit for a very reasonable price. Covers DC to 1GHz.
Posted by: Lab Coat
| @ July 1, 2014 4:37:39 PM CDT ( ) |
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