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Seeking low power wireless recommendation
You can get an arbitrarily small power usage from the receiver, at the expense of strobing the base station query for on average half the sampling time of the rx wake period. The...
Friday, 1 May 2015 - 01:27
deRF usb 23E00 Sniffing
Search this forum for keyword 15dot4; builds are available for the raven usbstick and the sam7s24.   http://sourceforge.net/projects/...   These connect through USB to a...
Tuesday, 28 April 2015 - 18:26
Atmel program and periferical simulation
There is a java emulator that allows connection of MCU pins to external devices; the Contiki cooja simluator uses it to run SPI connected radios. The SPI protocol is implemented...
Wednesday, 22 April 2015 - 17:34
Reset pin circuit: how to avoid spurious reset when touching the board with fingers
If the reset continues when using a battery then it's probably in the board. If it goes away then  the touch is probably completing a ground loop or large area magnetic...
Thursday, 16 April 2015 - 17:30
Maximum throughput with AT86RF212B
You certainly need to characterize your RF environment. What is the background RSSI?  Is there modulation on your channel from nearby devices? When you send at 0 dBm what is...
Thursday, 16 April 2015 - 02:54
Pizeo Buzzer as a **Microphone Bug**
I have no direct experience but a change in the position of the diaphragm will certainly change the impedance of the coil which will affect both its Q and resonant frequency. A...
Wednesday, 1 April 2015 - 21:33
Can't make RZ Raven Evaluation and Starter kit work
The major problem with the supplied software was the hang on a corrupt file system. With the high impedance board a finger in the wrong place would cause that. Since that requires...
Sunday, 29 March 2015 - 03:14
AT86RF231: Correct way to put transceiver into and out of sleep mode
The delay variable is in the scope of the inner loop, so never times out? Suggest have the error message report the actual mode, that should give a clue where to look further...
Wednesday, 25 March 2015 - 12:31
AT86RF231: Correct way to put transceiver into and out of sleep mode
I suggest doing the timed wakeup delay before trying to access any of the SPI registers (or even 2x that time to begin with). Also, if the MCU resets while the radio is sleeping...
Thursday, 19 March 2015 - 17:00
Building LiPo battery pack questions
For completeness here is an official "Lithium-Ion Batteries Hazard and Use Assessment" report: http://www.prba.org/wp-content/u...   A consumer-grade protection circuit might...
Thursday, 5 February 2015 - 19:38
Do programmable thermostats really save you $$
For a long enough day. But since a cool filament has a lower resistance, dropping the duty cycle to e.g. half would end up using more than half the average current.   That is...
Wednesday, 4 February 2015 - 18:34
Building LiPo battery pack questions
I read that first board as having an upper voltage cutoff during charge, and a lower voltage cutoff during discharge, hopefully based on any cell being too high or low and not...
Wednesday, 4 February 2015 - 18:21

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