thanks once again for an excellent presentation sir warren, much appreciated...a good lecture that collects another ideas...
thanks to all and most especially DIGI-KEY and DESIGN NEWS for giving this continuing education, a valid educational earner as a practicing engineer in the profession...
i will go to the next lecture for day 2 presentation...thanks sir warren...GREAT!
Good overview and the course outline looks good. So as not to be labelled mere 'techies' or 'hardware weenies' I would like to see a few slides regarding concepts/strategies/approach/methods for when to transition the varying power modes. The rationale slides were good.
@Warren: How could we measure the power consumption of the board in the case it run in very low power mode? I guess they dont have to wait for weeks or months to give a conclusion?
luthermcg- 68 year old P.E. ; BS Engineering Physics; 19 years in Forensic Engineering; 12 years of running my own business. Control engineering; Process Control for 25 years uning computers since 1970's. Some design of micro processor program and usage. Basic ,Assembly now learning C.
Skechy- The term Gated for the CPU clock basically means that the clock to the CPU is turned off (usually a gate is placed such that the clcok can be forced high or low- thus "Gated" off. This helps reduce dynamic current since nothing in the CPU will change state while the clock is Off.
For energy harvesting (solar), do people typically use in conjunction with rechargeable battery? I'm finding that the rechargable version is boosting cost considerably.
We've also found a lot of other things that contribute to energy use.....like rework on proto PCBs. Also, 70uA for a battery gas gauge becomes a lot when you're aiming for 150-200 uA in standby!
Solar power is also a very interesting power source. It can be fairly complex, but there are some good devices to help with harvesting solar at low currents available. Look for this to be a big growth area.
Here is a link to the web page for the energy harvesting kit: http://www.we-online.com/web/en/electronic_components/produkte_pb/demoboards/energy_harvesting/energy_harvesting.php
FYI, the first link on the "resources" slide (WE Energy Harvesting brochure) doesn't work. The TinyURL redirects, but nothing comes up. Haven't checked the others. Also, can I request that you make them actual clickable hyperlinks?
I'm attending because of an energy harvesting application. We use supercapacitors and thin film batteries. We harvest energy from mechanical vibration.
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