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Recent Posts
- Solar Thermal Tube testing
- Ruby v1.0b
- Ruby v1.0a
- Radios!
- Drilling the Marineland 300DD
- RF Interference
- Eflite 120mAh test done!
- Testing the Eflite 120mAh battery with a minimal jeenode
- Reading Lipo Voltage
- Reading the ARSSI pin on the Si4221/HopeRF 12B
- DHCP on the ENC28J60
- Silicon Labs’ RF chips
- RF12 packet loss
- RF12B Antenna length/type
- RF12B Modules…time to switch frequency?
Archive
- September 2011 (2)
- August 2011 (1)
- July 2011 (3)
- June 2011 (6)
- May 2011 (14)
Recent Comments
Archive for May, 2011
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RF12 packet loss
Posted on May 31, 2011 | 4 CommentsI’ve been trying to see how many packets are lost with a Jeenode I have on my roof about 50m from the receiver in side the house. There is a... -
RF12B Antenna length/type
Posted on May 30, 2011 | No CommentsThe antenna length for the 3 different frequencies can be calculated like this: Length(cm) = 7500/freq(Hz) Antenna size and frequency are inversely proportional. 433 1/4 wave = ~17.3cm 868 1/4... -
RF12B Modules…time to switch frequency?
Posted on May 30, 2011 | 1 CommentSo I’m toying with the idea to build my own Arduino clone with the RF12B transceiver. HopeRF sells the module in at least two physical formats (DIP and SMD) as... -
Learning Eagle
Posted on May 27, 2011 | No CommentsWell, after putting it off for months, I’m going to finally try and learn Eagle. I just went through the Sparkfun tutorials on Eagle. Pretty cool. I wish Adobe or... -
MCP3424 via the Wire library
Posted on May 25, 2011 | No CommentsFor some reason, I could not get the bit-banged I2C library from JeeLabs to work when I had two channels. It just gave me garbage data or wouldn’t report right.... -
Removing Overflow from Marineland 300DD
Posted on May 24, 2011 | 2 CommentsSo I finally got my Marineland 300 Deep Dimension Aquarium. The thing is a beast. I wanted to do a custom tank but the cost and delay (7 months and... -
Battery drain using the Ladyada Lipo charger
Posted on May 24, 2011 | No CommentsNot that it is the end of the world, but the LiPo charger has a fault that kinda bugs me. When the LiPo is fully charged, the MCP73833 shuts off... -
LiPo charging with the MCP73833
Posted on May 24, 2011 | No CommentsI bought a couple of the nice LiPo chargers from Ladyada. Its a nice little board with a strong JST connector and cable. The board has a cool feature in... -
Getting the NodeID in a RF12 packet
Posted on May 24, 2011 | 1 CommentI’m setting up a wsn and each sensor node will have a different packet. I’m using a bitwise field to define the packets. For example: typedef struct{ int temp1; int... -
Jeelabs Analog plug with the Apogee Pyranometer
Posted on May 24, 2011 | 4 CommentsThe Jeelabs Analog Plug has the very cool MCP3424 4 channel 12-18 bit ADC. I’m going to connect it to the Apogee Pyranometer so I can can get a reading...