Listen to your hosts Dave Jones & Chris Gammell talk about electronics design and the electronics industry in general. If you have any interest in electronics at all, from hobbyist/hacker/maker to engineering professional you'll find something of interest here.
Chris and Werner met when Werner gave a talk at HDDG in 2017
The talk focused on Xmega parts, which have a 2 Msps ADC
Qoitech is a Sony spinoff, where Werner was working on testing batteries on the cellphones.He had previously also worked on automation during linux mainline work.
Serial port control is an important thing when doing automated testing
CDB assist
PSOC5-LP has a CPLD in it
The Otii Arc was the first product from Qoitech, it’s a 2 quandrant power supply. They started in 2015/2016.
Chris asked if Werner had previously had used the Keithley 2306
Field testing is an imporant area for the Otii product line. “Measuremenets on the go” are easier with the extruded case form factor.
No computer will give you USB PD output power of more than 15W. Test equipment would benefit from a full 200W
Analyzer (Twinkie?)
A hub might be possible
USB Extended Power Range (EPR) will allow 240W
Are you sure you should plug that into your computer? Reminder about the OMG cable discussed on the show with MG
New EPR at 48V has specific shape for arcing
When designing a power supply for tattoo machine, it could only weigh half the weight of the cable (64g)
Software defined buck boost was discussed on CNLohr episode
Digital control is easier to get stable than analog because of programmable delays in the pipeline. You need to measure how long it takes to get the output to “show up”
Audio project real time jam sessions
The new product from Qoitech (that Chris got to see at Embedded World in 2023) is the Otii Ace
PJRC convinced Werner to check out the NXP RT106x family (instead of RT105x)
Otii is working on battery stuff
Arc has been out since 2017, but was limited output voltages 500 mv – 5V
Turns readings into audio signals for RT1060, which allows data to stream easier
There is one reference voltage driving everything in the design, they send frequency spike across gaps to all isolated sections using RF isolators
Hard time getting the RT1060 parts during shortage
Battery stuff
Stepping through the battery internal resistance
Edging into the world of SMUs
Building a curve
Replaying battery data
Battery emulation
Continuous integration testing
Syncing to firmware
Battery aging
Devices running on coin cells
Cycling and automated testing and see it degrade over time
Thinking of batteries as impedance devices
Batteries having a passivation layer
“Low power” means different things to different people
Teardown of battery emulator
Low power is less than 200W
Qoitech equipment has been used in testing and production, including “in-the-loop” testing
“Generational degrade” when using previous versions of the product to validate new versions of the product. Instead they have a NIST traceable DMM in the loop
Chris mentions ever calibration shop has a Fluke calibrator. Apparently the HP 8753 wasn’t available in EU because of RoHS.
To learn more about Werner and the Qoitech team, check out the Otii Ace page