David Viveros Salazar, PhD

R&D Engineering and Consulting Services

[David Viveros Salazar, PhD @tortillaraised]

Laser diode steady at around 12 mW of optical powa!

[David Viveros Salazar, PhD @tortillaraised]

I attended the Innovation Trivalley DreamMakers and RiskTakers Awards this morning. Navigated a heavy drizzle over Dublin haha Seriously impressive community and even more impressive high school seniors

[David Viveros Salazar, PhD @tortillaraised]

First time working with RTDs instead of thermocouples. RTD —> Converter —> DAQ. I’m installing RTDs into a gas flow system to automate gas-flow temperature data acquisition. Took me a while to figure out the wiring haha

[David Viveros Salazar, PhD @tortillaraised]

Always try to work in a safety relief valve in your gas flow systems. This inexpensive part saved me from some serious instrument damage while setting up my CH4/N2 flow system

[David Viveros Salazar, PhD @tortillaraised]

Today I decided to use a Jetson Orin Nano (more on why later) and a Python script to control and acquire data. I was able to do it all from the command line!

[David Viveros Salazar, PhD @tortillaraised]

I’m working on generating a 1 million-scan laser-sensor dataset to train a machine learning model for real-time gas sensing. Initially I thought about using LabView to control and read from the mass flow controllers. I spent 4 hours connecting the wrong VIs to each other haha

[David Viveros Salazar, PhD @tortillaraised]

Working in LabVIEW this week. Trying to automate the data acquisition of methane in nitrogen over a wide concentration range, 1 to 10,000 ppm (1%), with the purpose of building a machine learning training dataset for a new approach to methane sensing

[David Viveros Salazar, PhD @tortillaraised]

Laser on! Got the laser and TEC wired correctly using the ThorLabs K-cube controllers. Finally rippin’ photons near 2281 nm!

[David Viveros Salazar, PhD @tortillaraised]

Working through some laser TEC-control details.

[David Viveros Salazar, PhD @tortillaraised]

@SBA_Matthias Consider getting a SNOO for the baby to sleep in. Worked wonders for my 3 kids

[David Viveros Salazar, PhD @tortillaraised]

Consider getting involved with Daybreak Labs and Startup Tri Valley if you’re in the Tri Valley area. Always a great opportunity to meet entrepreneurs at their events

[David Viveros Salazar, PhD @tortillaraised]

Sometimes you just can’t avoid having to pull out the soldering kit haha

[David Viveros Salazar, PhD @tortillaraised]

@davinafayette
Hey! Just trying to get of hold of you to try and create something!

[David Viveros Salazar, PhD @tortillaraised]

@NicoleKnightFTL
Hi Nicole! I was just messaging you on OF. Can you confirm? I’m just trying to talk freely with you!

[David Viveros Salazar, PhD @tortillaraised]

@davinafayette
Hi Davina! I was just talking to you on OF

[David Viveros Salazar, PhD @tortillaraised]

@davinafayette
Hi

[David Viveros Salazar, PhD @tortillaraised]

Even a 1-2 degree change in ambient temperature can result in a spectral shift in spectrometer measurements. In this Sensor paper, they show how to correct for spectral shift using an artificial neural network

Click below for 2 min summary

https://t.co/dIwzwRcjx1

[David Viveros Salazar, PhD @tortillaraised]

Not quite coin-sized but an interesting approach to 25X your pathlength. Read my 2-minute summary of a 2023 sensors paper!

https://t.co/wkEJNsDhe0

[David Viveros Salazar, PhD @tortillaraised]

@SMB_Attorney Here’s the link https://t.co/G5WoJX3dLR

[David Viveros Salazar, PhD @tortillaraised]

@SMB_Attorney The announced integration of Bing with ChatGPT seems like a huge move but there’s a chrome extension for ChatGPT that’s easy to use sooo… is that still a huge move?