marcoreps

Laser driver on GitHub

With the 20 projects going on at the same time, I thought I should at least take the time and wrap this up nicely and professionally: 

2018-09-10 10:22:37 +0000 UTC View Post

Maker Faire Hannover next week

Thought I'd go with the tradition and make a new gimbal for the occasion - but the BNO055 accelerometer seems to be a less than ideal candidate ...

WIth a fourth axis I wanted to try and cancel out ...

I am sensing a new trend in the vaping industry

Disclaimer: The thing is probably not going to last long when desoldering fluxy joints, but the effect just had to be captured ...

Beginning to feel confident about a Tektronix video

Some of the niche features of this thing are still beyond me, but I think now that I have a reference spectrum analyzer, a DIY logic probe, a DIY differential probe and an active probe, I can finally ...

Dexter inquires about delayed walkies

Couldn't put this down unfinished :L

Moai resin printer with actual laser and galvos instead of LCD or DLP! Took 5 hours to assemble and generated 60 GB of raw video footage. That has  already ...

A sign of life from the new output board

So this baby did not burst into flames right away AND the cv portion of the circuit which I have already populated seems to kinda work. For the current limits I'll have to find the right comp...

One more time: Laser driver is done

I have announced this before, when I finished my 2-stage constant current driver, that used an energy efficient DC-DC converter and a precise linear regulator.

Now I've finally managed to take contr...

A shiny but shallow RS Pro video

Originally I wanted to include the new OSMU board in this video, but I've agreed to give RS Pro all usage rights for it. So I kinda cheaped out in the last second to give them something less important...

a concentrate, professional, focus

Got all the DIY footprints right, gg ez :)

High res: 2018-08-27 20:47:04 +0000 UTC View Post

OSMU boards and non-OSMU video tomorrow

bit of a noisy video until then ... I absolutely need to get back into synthesizers after this whole CNC and laser business is concluded

Don't trust cheap switching power supplies

Happy to report that ODrive survived, but that's luck. I think I'll throw out or at least mark all PSUs that do something like that ...

Also got OSMU parts! PCBs and a new video coming next week. Or...

Particulate matter sensor vs Solder fumes

It detects PM1.0, PM2.5 and PM10 concentrations in µg / m². With solder smoke it detects mostly the largest PM10 category which is a relief because it doesn't get into the body as easily.

2018-08-22 19:07:15 +0000 UTC View Post

Moving components and traces around

is all I've done this weekend. And I enjoyed every bit of it 😌

There's something therapeutic in finding arrangements that are electronically sensible and symmetrically aesthetic at the same time....

What makes a good fiber lapping puck?

Another thing I haven't forgotten: The fiber laser and driver ... I wanted to switch to an even higher grit lapping film or paste and a disk for holding the ferrule at a constant angle.

Such a disk ...

KX voltage reference assembled ✔️

like 5 minutes ago. That and the lack of all shielding might be causing a little bit of of noise. Or I screwed up somewhere, which is particularly easy with melty film capacitors and tight guarding tr...

Can IL300 be a floating voltage source? pls?

I am putting a lot of trust in these linear 'opto-isolators': https://www.vishay.com/docs/83622/il300.pdf

But I do...

Resistors mean business when they have certificates

5 months lead time and 200 bucks for these beauties! The metal can ones are hand-crafted and hermetically sealed. And that's only accessories in the quest for an ultra-stable voltage reference.

The ...

My late but effective response to the heat wave

Also OSMU current source / sink clamping simulation: 2018-08-14 11:07:35 +0000 UTC View Post

Unforeseeable result of testing coolant pump on carpet

😑

New OSMU output stage ideas

Sorry for the lack of activity here, this thing is keeping me terribly busy *_*

OSMU introduction if you haven't seen: https://...

Eleksmaker upgrades ep3 ??

What could possibly go wrong?

Long unedited video about a drill press

Also runout: https://www.youtube.com/watch?v=TfPCK3iLku8

I've never waited so long for a BG delivery: Almost 2 mon...

Can I embed photos.google.com now?

Been a while since I tried that, surely they have improved that by now ... right?

Another item falsely advertised as defective 😤

https://www.youtube.com/watch?v=h1-2YicAjxs

1700 exposures ... a busy dentist probably does that in a month 🦷 (...

Time for a skelfie

Got a broken dental x ray machine ... maybe it fits in the old surgical ceiling lamp holder? 

New step attenuator for the spectrum analyzer

Still something wrong tho, there seems to be a huge dc bias voltage in the higher frequency ranges while the 30 MHz cal signal (which I've verified before) doesn't get through.

But we've come so far...

Giving away the 6 remaining 'souvenirs'

One for the comment with the most ❤️s and 5 selected by me based on proprietary algorithms &nbs...

Run in testing cheap linear rails

The cheapest linear rails are delivered in a pretty horrible state. Especially the new black ones. I've tried ultrasonic cleaning and re-greasing / oiling them to no avail. Still horrible. Now I'd lik...

Saved the best ones for last

All of these products deserve a closer look, but they've been sitting here for way too long, so I thought I'd show them briefly and get back to them when the time is right

Does anyone recognize that...

Glowy Tritium vs. Geiger Müller Tube

I must have had this tritium keychain for a while, because I remember asking our chemistry teacher in school if we could measure it with the geiger counter there. Being the typical German teacher with...