Lmst

Inspired by my last #WS2812B #PCB, I decided to do a smaller version and try to add a USB C connector. I'm very pleased how it turned out. The LEDs are not as close to each other as last time, but I still used my hot plate to solder them. And hot air for the back side.
Again, manufactured by @aislerhq and designed using @kicad
#pcbdesign #diyelectronics #ATtiny814 #hotplatesoldering #hotairsoldering #soldering #usbc

the front side of the PCB. left is the unpopulated version and in the frame, and right is the finished version with all the LEDs and capacitors, as well as the two resistors for the CC lines.

the back side of the PCB. left is the unpopulated version, and right is the finished version with the ATtiny microcontroller, button, and USB C connector

the finished board from the front, with power supplied through USB C. the LEDs are lit in different colors, a snapshot of the rainbow scrolling effect that is running on the microcontroller

I have a dilemma.

I already have a mouse sensor for my new mouse design - the PMW3389. It's a flawless sensor, and it happens to be the same one used by the trackballs of the Svalboard, which is good because I need to write a Rust driver for RMK to support that chip anyway.

But my mouse is a _wireless_ device... and the PMW3389 is not particularly low-power. The PAW3395 would be a better fit, but then I need to redesign my PCB, and I'll have to write _two_ Rust sensor drivers...

#pcbdesign

Up way too late preparing a PCB order and corresponding parts order.

And sadly, the PMW3389DM and PAW3395DM are not pin-compatible. So if I want to switch for power reasons, I need to reroute several pins. :blobcatsleepless:

#pcb #PCBdesign

PCBs arrived the other day, and I finally get to try out the combination fuse footprints I designed, and they seem to fit wonderfully 😍 they allow to use either 5x20 fuse holders or the car blade fuse things. Had some issues with spacing of holes when designing this, but the solution I found seems to work nicely
#diy #electronics #pcbdesign

Half populated PCB. Top two fuse holder slots are occupied by car blade type fuse holders, and the bottom 3 by two different types of 5x20 fuse holders. Also some space connectors and a wago termin are populated below

Unpopulated PCB with some large holes for XT90 connectors on the right, and lots of small holes on the left, for fuse holders, allowing one of two different types of fuse holders in each slot

⚡ Protect your high-speed interfaces the smart way! Discover how Shanghai Leiditech’s Low Capacitance Multi-channel ±15kV ESD Protection Array delivers powerful protection without compromising signal integrity.

🚀 Read our full Part Number Selection Guide and find the perfect match for your next design!
https://medium.com/@yamy28508735/part-number-selection-guide-shanghai-leiditech-electronics-low-capacitance-multi-channel-15kv-esd-2d58f34dbd32

🔗 𝗙𝗶𝗻𝗱 𝗼𝘂𝘁 𝗺𝗼𝗿𝗲:[en.leiditech.com]
𝗖𝗼𝗻𝘁𝗮𝗰𝘁 𝘂𝘀: sales16@leiditech.com

#ESDProtection #ElectronicsDesign #HighSpeedInterface #Semiconductors #SignalIntegrity #PCBDesign

Formula Student BMU by Delta Racing 🏎️ A Custom Battery Management Unit featuring an STM32F303 MCU and LTC6820 isoSPI for daisy-chain monitoring of 10 battery modules.
Key hardware safety:
🧡 Hardware-latched faults (IMD/BMS)
🧡 Physical shutdown circuit trigger (software-independent)
🧡 Integrated TSAL Green circuit

#Hardware #Engineering #PCBDesign #Technology

A custom-designed green PCB (Battery Management Unit) for the Delta Racing Formula Student team. The board features an STM32 microcontroller and high-precision surface-mount components, manufactured by AISLER.

Commodore 1541 Alps Swap Revives a “Dead” Drive
#Commodore64 #Commodore1541 #DiskDriveRepair #RetroComputing #VintageComputing #FloppyDrive #HardwareHack #PCBDesign #3DPrinting #AppleUniDisk #RetroBits #VCFSwapMeet
https://theoasisbbs.com/commodore-1541-alps-swap-revives-a-dead-drive/?fsp_sid=1302

Scaling to 6 or 8 layers? We’ve added new KiCad templates for our 35 µm ENIG configurations. Pre-configured for 100 µm traces, 0.25 mm vias, and impedance matching.

Download from GitHub: https://github.com/AislerHQ/aisler-support/tree/master/kicad

#KiCad #PCBDesign #Engineering

Ever wondered how a diode actually works? 🤔⚡️

It’s the "one-way valve" of electronics, but there's so much more going on inside! In my latest video, I break down the P-N junction, explain Forward vs. Reverse Bias, and compare common diodes like the 1N4003, Schottky, Zener, and LEDs.

Watch the full breakdown here: https://www.youtube.com/watch?v=a9LnNkGxeyQ

#Electronics #PCBDesign #Semiconductors #DIYElectronics

Flux | Design PCBs with AI (@BuildWithFlux)

전자제품의 총소유비용(TCO)이 낮아지면서 누구나 자체 하드웨어를 만들기 쉬워졌다는 내용의 하이라이트를 공유한 트윗입니다. 해당 토크는 CEO Matthias Wagner가 @latentspacepod(라텀 스페이스 팟캐스트)에서 발표한 최근 대화에서 발췌된 내용입니다. 하드웨어 접근성 관련 논의입니다.

https://x.com/BuildWithFlux/status/2015515683652813298

#hardware #electronics #pcbdesign #latentspace

The analog section of a Bluetooth audio SoC is where careful design pays off. Notes from the JieLi AC695N/AC696N guide:

For the DAC outputs, they recommend reserving positions for small inductors (100nH, 120nH, 220nH, 330nH) to form filters that can suppress high-frequency noise, specifically called out as TDD noise from a nearby mobile phone during calls.

#JieLi #AC696N #AudioDesign #Analog #PCBDesign #Electronics #OpenHardware #BluetoothAudio

https://lnkd.in/gRRab4Vi

The analog section of a Bluetooth audio SoC is where careful design pays off. Notes from the JieLi AC695N/AC696N guide:

For the DAC outputs, they recommend reserving positions for small inductors (100nH, 120nH, 220nH, 330nH) to form filters that can suppress high-frequency noise, specifically called out as TDD noise from a nearby mobile phone during calls.

A critical layout rule: around the DAC circuit and its solder points, pour AGND (or no pour at all). Explicitly: Do not pour "digital GND" and keep the area away from it. This isolation is key to preventing digital switching noise from coupling into the analog audio paths.

A component difference: For electret microphone solutions, the AC695N requires a DC blocking capacitor on the MIC input, which the AC696N does not. Important for BOM and schematic checking.

Simple, actionable advice for clearer audio.

#JieLi #AC696N #AudioDesign #Analog #PCBDesign #Electronics #OpenHardware #BluetoothAudio
https://lnkd.in/gRRab4Vi

OneROM Fire 40 Brings 16-Bit ROM Flexibility to the Amiga
#OneROM #Amiga #Kickstart #RetroComputing #Commodore #C64 #PCBDesign #RP2350 #RaspberryPi #HardwareHacking
https://theoasisbbs.com/onerom-fire-40-brings-16-bit-rom-flexibility-to-the-amiga/?fsp_sid=661

For the #electronics and #embedded crowd: a concise summary of the hardware design guide for JieLi AC695N/AC696N Bluetooth audio SoCs.

It offers crucial DFM advice: you MUST provide test points for the programming pins (USB, power), as the small QFN package necessitates programming after SMT assembly via a USB connection.

#JieLi #AC696N #HardwareDesign #BluetoothAudio #PCBDesign #CrystalOscillator #OpenHardware

https://lnkd.in/g3BHgwXJ

For the #electronics and #embedded crowd: a concise summary of the hardware design guide for JieLi AC695N/AC696N Bluetooth audio SoCs.

It clearly states the non-negotiable absolutes: input voltage maxima (VBAT 5V, LDO_IN 5.5V), and the necessity of battery protection circuits.

It highlights the most critical component: the 24MHz crystal oscillator, specifying ±10ppm tolerance and 12pF load capacitance for reliable Bluetooth RF performance.

It provides a pragmatic power design choice: use the internal LDO if you can, or a >2MHz external DCDC converter (with 1% feedback resistors) for the 1.26V core if you need the efficiency.

Finally, it offers crucial DFM advice: you MUST provide test points for the programming pins (USB, power), as the small QFN package necessitates programming after SMT assembly via a USB connection.

#JieLi #AC696N #HardwareDesign #BluetoothAudio #PCBDesign #CrystalOscillator #OpenHardware

https://lnkd.in/g3BHgwXJ

KiCad 9.0.7 released

https://www.kicad.org/blog/2026/01/KiCad-9.0.7-Release/

#KiCad #PCB #PCBDesign #FOSS

JuiceBox Amiga PSU Upgrade Tested
#Amiga #Amiga500 #Amiga600 #RetroComputing #PSU #USBC #HackBuildRestore #Electronics #DIYRetro #PCBDesign
https://theoasisbbs.com/juicebox-amiga-psu-upgrade-tested/?feed_id=7417&_unique_id=6957d49cab39b

I designed another PCB... Small preview without revealing what it will be. It'll arrive mid January, though.
They will be manufactured by @aislerhq again, using the 20% December discount for using their #KiCad plugin.
It'll have the option to use an AVR DA compatible #microcontroller or a #tinyAVR one - I added options for both that I have in stock (AVR32DA32 and ATtiny814). Since it won't use many pins, I could have used smaller variants, too.
#AVR #AVRDA #ATtiny #pcbdesign #kicad #aisler #pcbdesign

A screenshot of the PCB layout designer of KiCad. You can see part of my new PCB, where the microcontrollers will be placed. What exactly it'll do is a secret.

Because I Can: ESP32 meets the Ancient CS5529

Current status: Unemployed (far too long).
Current mood: Let's over-engineer something.
I dug through the parts bin and found an old Cirrus Logic CS5529 ADC (16-bit Delta-Sigma). Sure, I could use a modern I2C ADC, but where's the fun in that? Poorly documented SPI sounds better.
Spin up a custom ESP32 board and write a driver for this dinosaur from scratch.

#esp32 #electronics #PCBDesign #VintageTech #Maker #unemployed #arbeitssuche #itjob

I was looking through old photos and found this from the end of 2019.

I'd just built my 2nd hand-wired keyboard and had an idea: almost always keys are spaced at multiples of 1/4U, so why not have a long narrow PCB that essentially embodies the row wiring & holds the diodes.

I don't know what exactly the problem with the design was but for some reason it wouldn't work. (maybe just that the diode pads were on the wrong side??) And then for the next years I didn't touch it or think of it until now.

I wonder if I still have the design files.

#oshpark #kicad #keyboard #pcbDesign

A long narrow purple PCB sits on a row of cherry-type keyswitches, which are in some kind of black 3D printed plate. It is seemingly all ready to be soldered up...

A view of the other side of the PCB showing a detail of the hole pattern and a spot for a diode. The holes are spaced so that keys can be put at any multiple of the 1/4 key unit "U"

Small little question here..

For PCB ordering is PCBWAY or JLCPCB better? I've asked friends and teachers and everyone has a different answer and I would like to know if anybody has any significant positive/negative experiences with either of them. There is a local PCB company but for the small amount I want printed the price is far too high

#askfedi #pcbdesign

#pcbdesign

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