This NFC tag PCB is special. Why? The NFC IC harvests energy from the RF field and supplies both itself and the MCU!
15 mW of power from the field.
It should be enough for the MCU to wake up and make some fast job.
It seems there will be about 30 ms for such a job.
I'm excited about it.
Your project manager wants you to add a precise voltage, current and power measurement.
Not a big deal? Well, with PAC1811, it's a piece of cake.
Whenever I need to measure something, I put the option to sample it, measure it and calculate it to the last spot on the list.
I discovered this Energy monitor while checking the latest news for my newsletter.
The newsletter was published a few days ago. The evaluation design is ready.
If you remember, I presented a dual energy monitor, INA2227, last month. This PAC1811 is a single-unit device.
Do you need fancy test loops for zero coins?
โข Ordering directly from KiCad using ๐ฃ๐๐๐ต ๐น๐ฎ๐๐ผ๐๐ ๐๐ผ ๐๐๐ฆ๐๐๐ฅ plugin.
โข EU manufacturing = short delivery distances.
โข I love to support EU companies.
The boards are usually on my desk within 10 days. The quality is always top-notch.
What if your business card required zero power and worked with every smartphone on the planet?
That's not a concept. I built it.
The ST25TN01K from STMicroelectronics is an NFC Forum Type 2 tag IC โ passive, 13.56 MHz, no battery, two components on the PCB.
I received the feedback that my design with a 4-20 mA isolated current loop receiver is too simple, and it's not worth manufacturing alone.
Then, I designed and manufactured this PCB.
There is literally a SINGLE component needed.
The NFC tag STmicro ST25TN01K.
I hit the wall while streaming my recent session with STm32MP215F
When adapting the reference design using DDR4 modules I failed to map the DDR3L memory module to the MPU posts
I found the AN5723 describing the DDRA0-7 meaning on the MPU and STM32CubeMX which contains the DDR tool with a validator
That's THE printer. I've been trying to make the best from this ...thing.
But do you know what?
Besides all the cons of this gadget, I rather use IT or to play around with bare PCBs and building towers and valleys (as I did in the near past).
I found something similar (a printer, but 10x better).
This is my new I2C 42-V bidirectional energy monitor board.
All features of this device will be checked.
I verify everything. I let exceling Claude when crafting the firmware for Arduino.
The situation on the market with power monitors is almost ideal.
Devices are getting smaller and powerful.
Do you need the HARDWARE DESIGNER? I'm here
Do you need a layouter? I pass.
I don't make it easier for you. I know it.
I'm juggling with so many plates that you can be, and probably are, confused.
You get my maximum support from 0 to the final device. Zero are your ideas. Zero are your dreams.
A single Prepreg layer causes high-speed invariances in char impedance
Prepreg is a structured material isnt homogeneous
Imagine a fibreglass below the highspeed track here and a few mils aside a space between fibres
When they laminate 2 or 3 Prtepreg layers, the randomness becomes more controllable
Digital isolators and transceivers are excellent.
But you need isolated power supplies for the external side.
Whenever you find an easy-to-use and small power converter, or let's say a DC-DC module, you should be as happy as I am now.
The Texas Instruments UCC33420 is a 1.5W 5V-5V module.
A 12-mm tactile button replacement
An immortal one.
โขย Only verified designs because we care at Beny-devices.
โข All Hardware Design Templates were designed with love, manufactured, tested and presented to you.
โข All is open. You can literally steal each design.
At Beny-devices.eu
The second NFC tag I've designed recently.
By far the simplest one. There is just the IC and a cap and an NFC antenna.
After the more complex one with the NT3H2111, this one is on the opposite end of spectrum.
Both Hardware Design Template use the same NFC antenna.
Nice to meet you. I'm Petr and I'm addicted to VSCode with Codex.
Please let me explain and let me inspire you.
If you struggle with programming, as I do, you would understand why I quit the programming part of the job 3 or 4 years ago.
But when my best customers asked for it, I couln't say no.
You are not alone. We all make mistakes.
Well, if I knew, I would be a much better engineer. And probably much richer.
In the post picture, you can see:
โข swapped UART lines
โข incorrectly configured bidirectional buffer
Both mistakes were present in one of my recent big designs.
This NFC tag evaluation design is the first of a mini-series.
The second will be finished soon.
The second will be based on a super-easy-to-use ST25TN01K but I wanted to give a change to a more robust solution with NT3H2111.
Both Hardware Design Template use the same NFC PCB antenna.
Only verified designs because we care at Beny-devices.
I feel your situation. You are in a hurry. There is no time for mistakes.
At Beny-devices there are:
โข readable schematics
โข readable high-contrast PCB layout
โข product videos
If you want to save your time, grab the entire design package.
Nice to meet you. I'm Petr and I'm addicted to VSCode with Codex.
Please let me explain and let me inspire you.
If you struggle with programming, as I do, you would understand why I quit the programming part of the job 3 or 4 years ago.
But when my best customers asked for it, I couldn't say no.
Again, when L โฆ 2.5-rise-time distance, then OK
a 1 GHz signal with a 100 ps (10% of period) rise-time has a rise-time distance equal to 15 mm
> the limiting no-wave-action length is 2.5-rise-time distance = 37 mm
At 1 GHz, when the trace is shorter than 37 mm, you are OK.
A single Prepreg layer can cause high-speed invariances in characteristic impedance.
The Prepreg is a structured material far from homogeneous.
Two or three layers of Prepreg stabilise the characteristic impedance.
It hasn't been long since I rearmed to 4 channels.
This time, I enjoy the freedom of using an integrated functional generator and 4 analog channels.
There is only one thing that can be improved. The scope's trigger can't be set to the generator.
It's OFFICIAL. Without the blue badge, but still is.
This was the first time that DHL delivered a package (two boxes, in fact) with my full address including my title.
No Mr.
No Mrs.
No Mx.
I
am
#thatkicadguy
Thanks
Two stars in this post: Ignacio de Mendizabal and AISLER.
I did my job, too, but I mainly stood aside.
I finished the probes by soldering the SMAs. The only thing was that my edge-SMAs were a little but narrower than the standard KiCad footprint requires.
Thank you, Ignacio.
+ Cheap
+ The body is solid.
+ There is a level that micro-tilts the stencil in the operational position.
- Missing fine-tuning screws for the PCB.
- Difficult to align the stencil with the PCB.
- The upper moving part twists a little.
I finished, manufactured and tested the Active Scope Probe with a paper BW of 2 GHz.
I don't know what is the real BW.
I don't have tools to measure it.
BTW, as I promised, the design is online on my GitHub. My user name is hwidvorakinfo and the project is called "Active_Scope_Probe".
Link below.
I'm happy that you've been with me when I was working on this RaspberryPi CM4S Carrier board.
It took 7 KiCad Design Streams to finish it. That's quite a lot of work.
About 15 hours.
Many of you spent some time with me. Thank you.
Now, the board will be reviewed after a few nights and ordered.
Exactly!
I hit the [F] key accidentally when I was working on the PCB layout.
Now, you can find it easily. When you know KiCad.
This design came out better than I'd believed.
The component cluster is neat and small. The WE coil dominates while the 25-ball BGA of 2x2 mm lies in the centre.