Jonas 3j14

@[email protected]
42 Followers
455 Following
71 Posts
traps atoms with light ✨
GitHubhttps://github.com/3j14
Codeberghttps://codeberg.org/3j14
Pronounshe/him or they/them
Jonas 3j14Feb 26
Cosmic Meow BackgroundFeb 26

> This design probably hits the record of simultaneous use of TI parts in a single device.
*looks inside*
> Figure 2-1. 100-kV Reference Voltage
It said high-voltage reference on the tin. I expected high-voltage, just not 100kV.

For those reading along from a safe distance: https://www.ti.com/lit/an/sbaa203b/sbaa203b.pdf

Jonas 3j14Feb 17
PhosFeb 17

We just released a new video on theory and experimentation with high speed high linearity analog optoisolator circuits, DC to 1MHz.

I feel it turned out pretty well, give it a watch!

https://youtu.be/0tC-rYfaZB8

Boosts appreciated!
#electronics #engineering #analog

Jonas 3j14Jan 19
Chaostreff TübingenJan 19

Hallo miteinander 👋

Der #ctt hat @anneroth eingeladen um über geschlechtsspezifische digitale Gewalt zu sprechen.

Komm doch vorbei und erzähl es deinen Freund:innen.

Dienstag 10.2. franz.k Reutlingen (Hbf)
Einlass 19:30
Beginn 20:00
Eintritt frei

https://www.franzk.net/buehne/10-02-2026-geschlechtsspezifische-digitale-gewalt-ein-vortrag-mit-anne-roth

Jonas 3j14Jan 14
GregJan 6
Crisp solderpaste 😋
Jonas 3j14Jan 2
Cosmic Meow BackgroundJan 2
first board of the year! (designed and ordered last year)
this is a bipolar analog bias supply for bread-board and also solder-on use.
this is, i think the third iteration of this circuit and i got tired of layouting it over and over again so now it’s a module.
It‘s wide-vin with a boost, an inverting buck-boost and a TPS7A39 LDO to have clean supplies.
Show threadJonas 3j14Dec 13
of course the LEDs are also animated
Jonas 3j14Dec 13

they work! I'm now running rust on my earrings.

and battery life is much better than expected (more than 4h, depending on the brightness of the LEDs).

Show threadJonas 3j14Sep 10, 2025

So it turns out that there is a typo in the datasheet and there is no separate VDDUSB and VDD on this footprint.

So my approach of splitting these two rails to save power when only a battery is used was entirely pointless and the two rails are shorted. No wonder nothing works.

The typo is mentioned in some ST forum thread, and will be corrected in the "coming release of the datasheet" :(

Jonas 3j14Sep 10, 2025
Soldering done, let's see if they work? Any guesses what they are?
Jonas 3j14Sep 10, 2025
New project time :) finished populating two boards, already found some mistakes so these are only to test the basic functionality. Solder paste job could be better but I think this is good enough :) let's see if it reflows #electronics #pcb