episode 32: a lying oscilloscope, TV repair attitude and VGA generation
Release Date: 12/10/2018
episode 45: glucometer, fuel consumption and vacuum cleaner
CBA Podcast
(Michai is too lazy to make shownotes now, check again later. :-)
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episode 44: DMX512, ground reference and LED decoration stuff
CBA Podcast
Hi, and an extremely good 2021 to all of you.
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episode 43: DMM probes, laundry fix and light-hangout
CBA Podcast
Prepare 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.
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episode 42: exploding cap, 3D-printing and planet decoration
CBA Podcast
The thrilling tale of 4 months of doing pretty much nothing interesting is coming to a podcast near you today!
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episode 41: oversized test-jig, spiky LED ball and knowing your equipment
CBA Podcast
In this time of global turmoil, the CBA Podcast once again proves to be your one-stop source of distraction and meh-grade information.
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episode 40: xmas smoothness, deadlifts and resistive load
CBA Podcast
Welcome 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.
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episode 39: crossing borders, intensity curves and anti-theft socks
CBA Podcast
Another mixed bag as usual. 2 meetups with the CBA Quality Team for some Quality Time.
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episode 38: LEDstrip fun, rand, and voltage drops
CBA Podcast
Hi 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"...
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episode 37: past events, lasercutting and fear of breaking the rope
CBA Podcast
You 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...
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episode 36: triple screw-up, LED lamp biopsy and bodyfat measurement
CBA Podcast
After 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.
info_outlineApologies for the apparently low volume and low tone of voice - I think someone might have been tired.
This episode discusses ongoing PCB failures, oscilloscope overdrive recovery, a BT-enabled headphone that would just keep connecting, some local events (GLOW, Awesome Space repair day, and the HCC Retro quarterly meeting). Finally, an experiment gone out of control resulted in a small PCB for generating colour effects for 4 connected VGA monitors. Ruby is used as "effect description language".
Links:
- EEVblog forum post on oscilloscope overdrive recovery
- video 1, video 2 and video 3 of my VGA generator board
- an older QuickStart page I made about using the NetPBM family of human-writable bitmap formats
- the GLOW festival (light-themed, annual, Eindhoven, NL)
- Awesome Space retro place (Utrecht, NL)
- HCC Retro interessegroep / division (Bilthoven, NL)
- HCC Robotica interessegroep / division (page in Dutch, Amersfoort, NL)
- RobotMC.be robot-related group (page in Dutch, Sint-Katelijne-Waver, BE)
If interested, here's basically how one would define one out of many possible colour-effects for the VGA generator board, executed in parallel:
("Compiling" all effects on a timeline will result in a list of (R,G,B) tuples for each 60 Hz frame for each of the 4 monitors connected to the PCB.)
Connector-fail:
VGA generator board rendering:
Actual assembled PCB:
