278: Bricks' Batteries Last Forever (Repeat)
Embedded11 Feb 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.

Episoder(569)

41: Pink Universes Die Really Quickly

41: Pink Universes Die Really Quickly

Micah Elizabeth Scott (@scanlime) came to talk about Fadecandy, a really neat way to control smart LEDs (NeoPixel, AdaFruit's term for the WS2812). The conversation ranged from beautiful LED control a...

5 Mar 201456min

40: Mwahaha Session

40: Mwahaha Session

Evil Mad Scientist's Lenore Edman (@EMSL) talks about what evil mad scientists do on their path to world domination. Surprisingly, it consists largely of art, education, and soldering. Some EMSL items...

26 Feb 201456min

39: I Blame Space

39: I Blame Space

Jen Costillo (@r0b0ts0nf1r3) joined Elecia to talk about Jen's start-up: Bia Sport (@BiaSport). They discuss the difficulties of being in an underfunded start-up as well as the joys of shipping a new ...

19 Feb 20141h

38: Blame the Monkey

38: Blame the Monkey

Producer Chris White (@stoneymonster) and Elecia discuss some insurmountable problems and some strategies for approaching them.  Google it (or look on Stack Exchange). Explain the problem to someone ...

12 Feb 20141h 1min

37: Surf's Up

37: Surf's Up

Dr. Karen Shell and Elecia talk about modelling vs. building models, ocean albedo vs. ice, climate vs. weather, and science vs. policy. They gloat about being on vacation only intermittently. National...

31 Jan 201450min

36: Drive the Boat with a Wii Mote

36: Drive the Boat with a Wii Mote

Elecia gushes about her favorite logic (and protocol) analyzer to Saleae co-founder Mark Garrison. They also discuss start-ups, manufacturing, and covering yourself with rum and pretending to be a pir...

22 Jan 201452min

35: All These Different Reasons Why You Might Want to Do Something

35: All These Different Reasons Why You Might Want to Do Something

Want to learn how to get from idea to schematic, through layout, all the way to physical boards? Elecia spoke with Chris Gammell about his Contextual Electronics course to teach the missing steps betw...

15 Jan 201456min

34: Really Big Cabbage

34: Really Big Cabbage

Elecia describes to Christopher (@stoneymonster) how to design and create a firmware update mechanism. Hilarity ensues.  4k PC emulator Making Embedded Systems, the book, on O'Reilly (coupon in last 2...

9 Jan 20140s

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