278: Bricks' Batteries Last Forever (Repeat)
Embedded11 Helmi 2022

278: Bricks' Batteries Last Forever (Repeat)

Matthew Liberty shared good advice for lowering power. We talk about different ways to measure current (Matt has a nice write-up) and things software can do to decrease power consumption.

Sleeping is critical, of course, as is choosing your clock speed and setting the GPIOs to good states. Everything is fine until you start getting into the microamps, then your multimeter measurements may start to fail you. (EEvblog explains why in his uCurrent intro.)

Eventually, you may want to measure nanoamp sleep states along with amp-consuming wake states. Matt's Joulescope is a tool to do just that (Kickstarter goes live Feb 19, 2019!), automatically moving between 9 orders of magnitude of dynamic range and graphing the results on your computer.

Matthew's consulting company is JetPerch.

We mentioned Colin O'Flynn's ChipWhisperer which uses differential power analysis for security attacks. We also talked about Jacob Beningo's post on protecting your tools.

Find Matt on Twitter as @mliberty1.

Elecia is giving away a chapter of her O'Reilly book, Making Embedded Systems. It is Chapter 10: Reducing Power Consumption. Hit the contact link if you want a copy.

Jaksot(568)

16: Democracy Is the Worst Form of Government

16: Democracy Is the Worst Form of Government

Elecia tries to get a handle on whether Agile works with embedded software.  Curtis Cole (@citizencurtis) argues in favor of user stories, scrums, and story points. Agile software development on Wikip...

28 Elo 201353min

15: Robot on the Front

15: Robot on the Front

Andreas Eieland (@AndreasMCUguy) from Atmel joined Elecia to talk about how the AVR processor line came to life, why there is an AVR in Arduino, and the spirit of making things. Arduino AVR Freaks Atm...

21 Elo 201348min

14: Hot

14: Hot

Artist Kristin Anderson of Idle Creativity spoke with Elecia about the technology of working with slumped glass, getting started on Etsy (Elecia mentioned her craft electronic ideas), and moving from ...

15 Elo 201341min

13: Introspective Nasal Gazing

13: Introspective Nasal Gazing

Christopher White ( @stoneymonster) emerges from his producer responsibilities to chat with Elecia about starting a podcast: the gadgetry, the software, the distribution, and, the big question, why we...

7 Elo 201354min

12: You Have a Jedi Sword

12: You Have a Jedi Sword

Dr. Edward White spoke with Elecia about how technology has changed medicine. He described gadgets used in surgery (harmonic scalpel!), how hospitals acquire tools, and why engineers should be focused...

31 Heinä 201349min

11: Tell Me I'm Wrong, It's Fine

11: Tell Me I'm Wrong, It's Fine

Karen Lightman (‏@khlightman) joins Elecia White to talk about the infinite awesomeness of tiny MEMS devices. Recorded at the (somewhat noisy but lovely and delicious) Blue Brasserie during SEMICON We...

25 Heinä 20131h 1min

10: Hands Off, Baby

10: Hands Off, Baby

Jen Costillo (@r0b0ts0nf1r3) joins Elecia White to discuss the secret parts of C, keywords that only embedded software engineers seem to know about. They talk about interviewing and why these keywords...

17 Heinä 201358min

9: Kidnapped and Blindfolded

9: Kidnapped and Blindfolded

Randi Eckstein grilled Elecia White (@logicalelegance) on inertial sensors: when to use accelerometers vs. gyroscopes; gyroscopes vs. rate sensors; how to make an inertial measurement unit; the basics...

9 Heinä 20131h 3min

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