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CBA Podcast

Michai Ramakers

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CBA Podcast

CBA Podcast

Michai Ramakers

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Followers
0
Plays
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About Us

A (mostly un-cohosted) podcast where we talk about progress - or lack thereof - of hobby-projects, mostly related to software, electronics or mechanical engineering.

Latest Episodes

DMM probes, laundry fix and light-hangout

EPrepare yourself for epic or less epic talk about a mains test jig that proved very useful, some awesome Probe Master DMM probes well worth the money, and both me and occasional cohost Domen fixing household stuff, and the subtle psychology of starting a repair. Homebrew-wise, the only thing I made was a smooth green LED under-plant decoration. For fun, I visited an informal light-art hangout and talked about adding DMX512 to my VGA generator board.

11 min3 w ago
Comments
DMM probes, laundry fix and light-hangout

exploding cap, 3D-printing and planet decoration

EThe thrilling tale of 4 months of doing pretty much nothing interesting is coming to a podcast near you today! (For complete show notes, see https://podcast.cba.si .)

17 minAUG 12
Comments
exploding cap, 3D-printing and planet decoration

oversized test-jig, spiky LED ball and knowing your equipment

EIn this time of global turmoil, the CBA Podcast once again proves to be your one-stop source of distraction and meh-grade information. (for full shownotes, see the CBA Podcast site)

18 minAPR 13
Comments
oversized test-jig, spiky LED ball and knowing your equipment

xmas smoothness, deadlifts and resistive load

EWelcome to the first and so far best episode of 2020, the third year of this podcast. Thanks for sticking around and making this happen, or alternatively, thanks for just tuning in - hope you like it.

25 minMAR 5
Comments
xmas smoothness, deadlifts and resistive load

crossing borders, intensity curves and anti-theft socks

EAnother mixed bag as usual. 2meetups with the CBA Quality Team for some Quality Time. Eindhoven Hackerspace Hackalot moved to a new location, and I put some LED decorative stuff there, making use of a light intensity curve for a better visual result. Furthermore, a trip down memory lane with an old elevator mock-up project, tests with 2 potting-materials, a hot glue meltdown, and taking a look inside an older anti-theft clothes tag.

17 min2019 NOV 12
Comments
crossing borders, intensity curves and anti-theft socks

LEDstrip fun, rand, and voltage drops

EHi there! Thanks for tuning in (or reading this text and then deciding not to tune in at all). Another episode with a mixed bag of semi-interesting topics. Thanks for the feedback - the inter-segment jingle will be a bit less loud from now on. Poor ears. We start off by counting pass & fail on this year's new year's resolutions, followed by mentioning a small inline PCB for driving LED-strips and so on. The PCB was used for 2 light effects so far - links to videos of both are given below. Ran into a "gotcha" when dealing with LED-effects: intelligent LEDs stuck in "full brightness" mode, causing the supply to shit itself and the system to become unresponsive. (Quickfix: small delay between boot and start-of-effect at power-on.) For the LED-effects, I measured rand() execution times (avr-gcc, avr-libc, ATmega168 @ 8 MHz) and was pleasantly surprised by its speed and predictability. Will use again. Finally, some fuzzy guesstimates / measurements about what kind of voltage drop to expe...

12 min2019 JUN 24
Comments
LEDstrip fun, rand, and voltage drops

past events, lasercutting and fear of breaking the rope

EYou thought that we finally learned from our mistakes and abandoned this podcast, and you thought wrong. Once again it's time to lower your standards, and enjoy a new episode of the CBA Podcast. We start with some PCB failures and flaws, followed by a very brief review of the Hackalot lasercutter & vinylcutter workshop. We attended T-DOSE, which is a Dutch open source event hosted in Eindhoven. Then for something slightly out of the ordinary, we talk about back-of-envelope calculations about whether a climbing-rope can actually break if I fall. (Spoiler alert: it cannot.) Some clarifications and errata about this climbing-rope segment: To calculate maximum force on the rope, I used the harmonic oscillator formula givenhere, where the actual force is calculated from fall factor, mass of object, but also the rope's rated impact force. (I forgot to mention that). Also, I made an error: I mentioned a maximum actual force of approximately 85% the rope's rated impact force, but this is in...

18 min2019 JUN 4
Comments
past events, lasercutting and fear of breaking the rope

triple screw-up, LED lamp biopsy and bodyfat measurement

EAfter more than 1 month of laziness, let's kickstart this episode with some failures and apologies. Next up is a summary of Hackalot's part in the Open Hackerspace Day 2019, and a teardown of a cheap and somewhat boring Aldi 230 Vac LED lamp. Finally, some very-voodoo and somewhat-less-voodoo methods of measuring the percentage of bodyfat in humans are briefly discussed.

16 min2019 APR 30
Comments
triple screw-up, LED lamp biopsy and bodyfat measurement

home sensors, disco LED hack and airplanes

EAfter 5 weeks or so, we're finally back! You'd think that means this episode is filled with 5 weeks worth of exciting techie stuff, but don't get your hopes up yet. Because it's not. Domen joins in to talk about his experiments with home automation, and a sowing exhibition lacking electronics and software. Furthermore, we talk about a disco LED box hack, and briefly list the difference between WS2812 and WS2813 intelligent LED.

19 min2019 MAR 22
Comments
home sensors, disco LED hack and airplanes

Rust, coroutines and cohosting

EFinally, the "we" in announcements doesn't just mean the royal we / majestic plural, but there's an actual co-host! Introduction is in the audio contents, so I guess you'll just have to listen. We talk about first contact with the Rust programming language, coroutines for implementing lightweight tasks/threads, various smaller topics and some upcoming events.

20 min2019 FEB 13
Comments
Rust, coroutines and cohosting

Latest Episodes

DMM probes, laundry fix and light-hangout

EPrepare yourself for epic or less epic talk about a mains test jig that proved very useful, some awesome Probe Master DMM probes well worth the money, and both me and occasional cohost Domen fixing household stuff, and the subtle psychology of starting a repair. Homebrew-wise, the only thing I made was a smooth green LED under-plant decoration. For fun, I visited an informal light-art hangout and talked about adding DMX512 to my VGA generator board.

11 min3 w ago
Comments
DMM probes, laundry fix and light-hangout

exploding cap, 3D-printing and planet decoration

EThe thrilling tale of 4 months of doing pretty much nothing interesting is coming to a podcast near you today! (For complete show notes, see https://podcast.cba.si .)

17 minAUG 12
Comments
exploding cap, 3D-printing and planet decoration

oversized test-jig, spiky LED ball and knowing your equipment

EIn this time of global turmoil, the CBA Podcast once again proves to be your one-stop source of distraction and meh-grade information. (for full shownotes, see the CBA Podcast site)

18 minAPR 13
Comments
oversized test-jig, spiky LED ball and knowing your equipment

xmas smoothness, deadlifts and resistive load

EWelcome to the first and so far best episode of 2020, the third year of this podcast. Thanks for sticking around and making this happen, or alternatively, thanks for just tuning in - hope you like it.

25 minMAR 5
Comments
xmas smoothness, deadlifts and resistive load

crossing borders, intensity curves and anti-theft socks

EAnother mixed bag as usual. 2meetups with the CBA Quality Team for some Quality Time. Eindhoven Hackerspace Hackalot moved to a new location, and I put some LED decorative stuff there, making use of a light intensity curve for a better visual result. Furthermore, a trip down memory lane with an old elevator mock-up project, tests with 2 potting-materials, a hot glue meltdown, and taking a look inside an older anti-theft clothes tag.

17 min2019 NOV 12
Comments
crossing borders, intensity curves and anti-theft socks

LEDstrip fun, rand, and voltage drops

EHi there! Thanks for tuning in (or reading this text and then deciding not to tune in at all). Another episode with a mixed bag of semi-interesting topics. Thanks for the feedback - the inter-segment jingle will be a bit less loud from now on. Poor ears. We start off by counting pass & fail on this year's new year's resolutions, followed by mentioning a small inline PCB for driving LED-strips and so on. The PCB was used for 2 light effects so far - links to videos of both are given below. Ran into a "gotcha" when dealing with LED-effects: intelligent LEDs stuck in "full brightness" mode, causing the supply to shit itself and the system to become unresponsive. (Quickfix: small delay between boot and start-of-effect at power-on.) For the LED-effects, I measured rand() execution times (avr-gcc, avr-libc, ATmega168 @ 8 MHz) and was pleasantly surprised by its speed and predictability. Will use again. Finally, some fuzzy guesstimates / measurements about what kind of voltage drop to expe...

12 min2019 JUN 24
Comments
LEDstrip fun, rand, and voltage drops

past events, lasercutting and fear of breaking the rope

EYou thought that we finally learned from our mistakes and abandoned this podcast, and you thought wrong. Once again it's time to lower your standards, and enjoy a new episode of the CBA Podcast. We start with some PCB failures and flaws, followed by a very brief review of the Hackalot lasercutter & vinylcutter workshop. We attended T-DOSE, which is a Dutch open source event hosted in Eindhoven. Then for something slightly out of the ordinary, we talk about back-of-envelope calculations about whether a climbing-rope can actually break if I fall. (Spoiler alert: it cannot.) Some clarifications and errata about this climbing-rope segment: To calculate maximum force on the rope, I used the harmonic oscillator formula givenhere, where the actual force is calculated from fall factor, mass of object, but also the rope's rated impact force. (I forgot to mention that). Also, I made an error: I mentioned a maximum actual force of approximately 85% the rope's rated impact force, but this is in...

18 min2019 JUN 4
Comments
past events, lasercutting and fear of breaking the rope

triple screw-up, LED lamp biopsy and bodyfat measurement

EAfter more than 1 month of laziness, let's kickstart this episode with some failures and apologies. Next up is a summary of Hackalot's part in the Open Hackerspace Day 2019, and a teardown of a cheap and somewhat boring Aldi 230 Vac LED lamp. Finally, some very-voodoo and somewhat-less-voodoo methods of measuring the percentage of bodyfat in humans are briefly discussed.

16 min2019 APR 30
Comments
triple screw-up, LED lamp biopsy and bodyfat measurement

home sensors, disco LED hack and airplanes

EAfter 5 weeks or so, we're finally back! You'd think that means this episode is filled with 5 weeks worth of exciting techie stuff, but don't get your hopes up yet. Because it's not. Domen joins in to talk about his experiments with home automation, and a sowing exhibition lacking electronics and software. Furthermore, we talk about a disco LED box hack, and briefly list the difference between WS2812 and WS2813 intelligent LED.

19 min2019 MAR 22
Comments
home sensors, disco LED hack and airplanes

Rust, coroutines and cohosting

EFinally, the "we" in announcements doesn't just mean the royal we / majestic plural, but there's an actual co-host! Introduction is in the audio contents, so I guess you'll just have to listen. We talk about first contact with the Rust programming language, coroutines for implementing lightweight tasks/threads, various smaller topics and some upcoming events.

20 min2019 FEB 13
Comments
Rust, coroutines and cohosting
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