Daniel Giesbrecht, P.Eng.
@giesbrecht.bsky.social
He/Him - Electronics Engineer, Consultant, Owner of Soley Engineering (soleytech.com),
FOSS supporter, high speed digital design enthusiast
Today I tried out OpenEMS. Here's a Gaussian-pulse with a bandwidth of ~5 GHz traveling down a micro-strip transmission line, done in 55 lines of python.
I'm excited to build more complex simulations, like a micro-strip layer transition with nearby vias.
I'm excited to build more complex simulations, like a micro-strip layer transition with nearby vias.
November 12, 2024 at 4:58 AM
Today I tried out OpenEMS. Here's a Gaussian-pulse with a bandwidth of ~5 GHz traveling down a micro-strip transmission line, done in 55 lines of python.
I'm excited to build more complex simulations, like a micro-strip layer transition with nearby vias.
I'm excited to build more complex simulations, like a micro-strip layer transition with nearby vias.
After over a week of prep, I started running an accelerated life test that I’ve been planning for months.
October 21, 2024 at 3:42 AM
After over a week of prep, I started running an accelerated life test that I’ve been planning for months.
My Fluke megohmeter and surface probes arrived today, and I grabbed the first static-dissipative tile sample I could find to try them out. A pass for the tile is 10^6-10^9 Ohms.
October 11, 2024 at 3:55 PM
My Fluke megohmeter and surface probes arrived today, and I grabbed the first static-dissipative tile sample I could find to try them out. A pass for the tile is 10^6-10^9 Ohms.
Sometimes dead-bugging is the best way. 8x 470uF Al-polymer caps on 10 AWG wire.
September 13, 2024 at 5:33 PM
Sometimes dead-bugging is the best way. 8x 470uF Al-polymer caps on 10 AWG wire.
Here's a board I designed for a client a few months ago! It's basically an industrial controller. It's amazing what some lights, a piece of paper and some patience can do. I know very little about photography, but this looks a lot better than the stills I was taking on my phone.
June 23, 2024 at 11:28 PM
Here's a board I designed for a client a few months ago! It's basically an industrial controller. It's amazing what some lights, a piece of paper and some patience can do. I know very little about photography, but this looks a lot better than the stills I was taking on my phone.
Step 0 of learning CFD simulation: learn how to create an air volume around my solid bodies (copper trace on FR-4). It's not _hard_, but there just aren't that many tutorials out there.
May 11, 2024 at 9:49 PM
Step 0 of learning CFD simulation: learn how to create an air volume around my solid bodies (copper trace on FR-4). It's not _hard_, but there just aren't that many tutorials out there.
@techconnectify.bsky.social a burning question for you: why are heat pumps and ACs rated in “BTU” instead of “BTU/h”?
I have no idea how to make sense of a unit of energy with no time span…
I have no idea how to make sense of a unit of energy with no time span…
April 6, 2024 at 5:00 PM
@techconnectify.bsky.social a burning question for you: why are heat pumps and ACs rated in “BTU” instead of “BTU/h”?
I have no idea how to make sense of a unit of energy with no time span…
I have no idea how to make sense of a unit of energy with no time span…
The $$$$ price-tag of a PDN probe is starting to make sense...
February 8, 2024 at 5:28 PM
The $$$$ price-tag of a PDN probe is starting to make sense...
In ParaView, you can set a unique colour for out-of-range data. This makes it really easy to see what areas of the copper geometry have an unacceptably high current density.
January 24, 2024 at 7:17 PM
In ParaView, you can set a unique colour for out-of-range data. This makes it really easy to see what areas of the copper geometry have an unacceptably high current density.
I spent the day measuring a 1.5 mΩ shunt to make sure I'm on the right track for low-impedance PDN measurements. I soldered it to a SMA fixture and measured it with a CM choke to reduce braid-error.
January 21, 2024 at 12:13 AM
I spent the day measuring a 1.5 mΩ shunt to make sure I'm on the right track for low-impedance PDN measurements. I soldered it to a SMA fixture and measured it with a CM choke to reduce braid-error.
I got my VNA, so I decided to compare the response of this jury-rigged CM choke.
January 20, 2024 at 7:29 AM
I got my VNA, so I decided to compare the response of this jury-rigged CM choke.
New VNA day! 😍
January 17, 2024 at 8:57 PM
New VNA day! 😍
Showed my roommate how to play Go! Fingers crossed he takes to it; it’s hard to find people to play with in person in North America.
(If anyone plays, hmu!)
(If anyone plays, hmu!)
December 23, 2023 at 7:29 AM
Showed my roommate how to play Go! Fingers crossed he takes to it; it’s hard to find people to play with in person in North America.
(If anyone plays, hmu!)
(If anyone plays, hmu!)
When the 2 coax cables you bought for your VNA cost more than your first oscilloscope 🥲
December 14, 2023 at 11:48 PM
When the 2 coax cables you bought for your VNA cost more than your first oscilloscope 🥲
Finally done a design I've been working on for months 😮💨
December 14, 2023 at 6:10 AM
Finally done a design I've been working on for months 😮💨
I've been acquiring more lab gear with goal of measuring component and PDN impedance. I don't have all the pieces I need, but I got my Arb Wavegen delivered and I wanted to play with it today and see how far I could push my current setup. I measured a 5 mΩ resistor today.
November 19, 2023 at 11:13 PM
I've been acquiring more lab gear with goal of measuring component and PDN impedance. I don't have all the pieces I need, but I got my Arb Wavegen delivered and I wanted to play with it today and see how far I could push my current setup. I measured a 5 mΩ resistor today.
It's been a minute since I've touched FEM simulation, and I have a need to do it for a client project, so today let's see if I can re-learn simulation in a few hours... 🧵
November 12, 2023 at 9:13 PM
It's been a minute since I've touched FEM simulation, and I have a need to do it for a client project, so today let's see if I can re-learn simulation in a few hours... 🧵
I feel bad criticizing something that's provided to me for free, but the 3D models from Ultra-Librarian leave something to be desired compared to, for example, the part render from Digikey's site.
August 24, 2023 at 6:39 PM
I feel bad criticizing something that's provided to me for free, but the 3D models from Ultra-Librarian leave something to be desired compared to, for example, the part render from Digikey's site.
Reposted by Daniel Giesbrecht, P.Eng.
We need to rebuild our electronics Twitter network, let's have an awesome HW/SW project thread!
Reply here with one or more projects that you are proud of and people might recognize you for 😊
Reply here with one or more projects that you are proud of and people might recognize you for 😊
July 2, 2023 at 2:25 PM
We need to rebuild our electronics Twitter network, let's have an awesome HW/SW project thread!
Reply here with one or more projects that you are proud of and people might recognize you for 😊
Reply here with one or more projects that you are proud of and people might recognize you for 😊