GitHub - scientistnobee/pocket-spectrometer-as7343: 12-channel pocket spectrometer (405-855nm) on M5StickC Plus with AS7343 sensor — WiFi web UI, adjustable gain/integration, CSV export 12-channel pocket spectrometer (405-855nm) on M5StickC Plus with AS7343 sensor — WiFi web UI, adjustable gain/integration, CSV export - scientistnobee/pocket-spectrometer-as7343

github.com/scientistnob...

Now my set-up is working more reliably. Thanks to @adafruit for releasing the AS7343 library very recently.

💡Our paper "Dispersion-engineered Floquet-Bloch phonon polaritons for extreme infrared beam control" is accepted! Polaritonic materials are thought to be unusable for light control, but we show that periodic structuring makes these materials actually quite useful.
Read here: lnkd.in/d8-GT4QY

This design seems to be different than the poseidon syringe pump, could you please share the files or point where to look for this pump?

PhD Studentship in Integrated Lasers for Optical Coherence Tomography, CAPPA Centre Overview of the CAPPA Centre:

Following my recent announcement of Frontiers for the Future Award, I'm pleased to share the opening of #PhD position.

Deadline: 25 January 2026

Full details and application information are available on
euraxess.ec.europa.eu/jobs/393670
#PhD #Photonics #LaserPhysics 💡

Following my recent announcement of Frontiers for the Future Award, I'm pleased to share opening of #Postdoc position

Deadline: 5 January 2026

Full details & application information are available on lnkd.in/ejGnG7MU

#PostdocPosition #Photonics #LaserPhysics #OCT #INSPIRATION #JobOpportunity

If you're interested in laser physics, photonic integrated circuits, or medical imaging technology, recruitment announcements will be posted here soon. Watch this space.

#Photonics #OCT #PhDPosition #PostdocPosition #ResearchIreland

This 4-year project will support one PhD student & one postdoctoral researcher position at the Centre for Advanced Photonics & Process Analysis (CAPPA), Munster Technological University, in collaboration with Tyndall National Institute.
#Photonics #OCT #PhDPosition #PostdocPosition #ResearchIreland

The INSPIRATION project will develop the world's first akinetic dispersive tuned laser operating in the visible spectrum that could make advanced OCT imaging more accessible for both clinical and industrial applications.
#Photonics #OCT #PhDPosition #PostdocPosition #ResearchIreland

I am pleased to announce that I have been awarded a Research Ireland Frontiers for the Future grant to develop a novel swept-source laser for Optical Coherence Tomography (OCT). #Photonics #OCT #PhDPosition #PostdocPosition #ResearchIreland💡

Call for data for survey of CCD spectrometers.

Do you have a CCD spectrometer?

If you do, would you please collect two fluorescent lamp spectra and send me the data in ascii format.

One with the 546nm just a little bit below saturation and another at about 1/4 of that intensity.

Thank you.

TCD1304 or S11639-01

Why you might choose the TCD1304 over the S11639-01 in most instances.

1) TCD1304DG $18 on Digikey, vs $200 to $450, and not found even on octapart.

2) Response spectrum, S11639-01 left, TCD1304DG right - self explanatory.

You mean hopocolor spectrometers are not viable or the tcd1304+transmission grating spectrometers are not viable?

Thanks for sharing these. I am quite aware of your work, following from your interactions with curious scientist on Pcbway project. So it’s glad to meet you here.

Diagram illustrating the process of capturing and reconstructing images using a diffuser fundus camera, starting from a schematic of the human eye through to a sensor capturing a raw image.

Teams from Johns Hopkins University & @bostonu.bsky.social demonstrate a retina imaging technique that digitally refocuses scans after capture. It removes the need for precise alignment, delivering sharper images & faster diagnosis. 👁️ #BiophotonicsDiscovery #Optics

Read more: https://bit.ly/4mZ34Kq

The best of 3D-printers is here, by hacking them into lab equipment

The culmination of many years work. One of the most advanced light-sheet microscopes in the world!

-> A large field of view Snouty light-sheet microscope, with any immersion remote refocus and real-time multi-angle projections!

For details see previous posts and here: github.com/amsikking/HT...

Simply beautiful

It makes me wonder what other scientific instruments are quietly undergoing similar transformations in unexpected places. Thanks to Leonhard for sharing the teardown images of hopocolor. and screenshots that sparked this observation.

These instruments are becoming viable tools for field measurements, where the cost-benefit equation of traditional spectrometers doesn't work. I think there is still room for improving these spectrometers in terms of cost & performance by using transmission grating with linear CCDs such as TCD1304.

These aren't just hardware upgrades. The manufacturers have developed desktop applications, mobile apps that run standalone or inside WeChat, and optional LCD displays. They're building complete measurement platforms, not just optical instruments.

Not only they use Czerny-Turner optical layouts - the same configuration found in laboratory spectrometers costing at least $2,000, they get you impressive specs: 350-800nm range, integration times from 50 microseconds to 10 seconds, and 2nm spectral resolution.

Compared to both Garden and Torch bearer spectrometers, what I'm seeing in hopocolor is entirely different: professional-grade spectrometers for just $250-$300, made by Hopocolor.

Then came torch bearer spectrometers, priced around $150-$200. Same general approach, but refined - better mechanics, improved optical alignment, more stable performance. Still using transmission gratings but executed with more care.

Previously, I covered garden spectrometers - the only spectrometers you could buy for under $100. These are simple enough: transmission gratings paired with camera sensors with Bayer filters removed. They worked but were basic. bsky.app/profile/chin...

I've been tracking low-cost spectrometers on AliExpress, but when I come across these ~$300 spectrophotometers, that closely resembles Ocean Optics' Czerny-Turner optical layout, I am very impressed.

There are so many budget friendly portable spectrometers available, I thought I'd post some photos of when I opened one, an hopocolor HPSC330, to replace the battery and recalibrate it afterwards. It seems to use a crosses Czerny-Turner geometry with a linear CCD

ODX: A Fitness Tracker-Based Device for Continuous Bacterial Growth Monitoring Continuous monitoring of bacterial growth in aqueous media is a crucial process in academic research as well as in the biotechnology industry. Bacterial growth is usually monitored by measuring the op...

3/3 The complete design files, firmware, and mobile application are available as open source under GPL 3.0 license at lnkd.in/eSq-asPH
Here is the ink to the ODX paper: doi.org/10.1021/acs....
The corresponding tweet that went viral is here:
x.com/VarunKothama...

2/3 ColorX extends this concept by repurposing fitness trackers as portable instruments capable of detecting five critical water quality parameters: nitrite, sulfate, chromium, free chlorine, and turbidity, with detection limits meeting EPA/CDC guidelines.

1/3 We just turned a $25 fitness tracker into a water quality monitoring device (Colorx). The results are now published. doi.org/10.3390/s251...
This is a follow-up of our ODX paper where we hacked a #fitnesstracker for bacterial growth monitoring. #WaterQuality #Sensors #odx

PIS IN SPACE! YouTube video by Jeff Geerling

PIS IN SPACE! Today's video on CubeSats was over a year in the making—and deals with two of my favorite things: Raspberry Pis, and space!

Also making a special guest appearance is Gabe from saveitforparts, using SDR to track sats: www.youtube.com/watch?v=qvN3...