Modchip style SOIC8 EEPROM to Stemma QT adapter


Francois Gervais
designed this clever flexible PCB:

Modchip style SOIC8 EEPROM to Stemma QT adapter

The design is available as a shared project:

Modchip style SOIC8 EEPROM to Stemma QT adapter

Flexible PCB flower 🌼✨

In this PCB art project, a surface mount LED is mounted on a flexible PCB “flower” connected to rigid PCB “pot” with a coincell battery:

Both PCBs were designed in KiCad PCB:

Using a second flexible PCB flower to diffuse the LED produced the best results

The PCBs are available as shared projects:

Festive Flexible Flower

Happy Birthday Flower Pot

Flexible PCB flower 🌼✨

Flex PCB mod for USB Type C

Great use of a flexible PCB in this project by James Ide:

USB-C-to-C Power Mod Flex PCB

Many devices have a USB-C connector to charge or power them. This is very convenient given the popularity of USB-C, its reversible cable design, and sturdy, compact design.

However, some devices will not draw power when using a USB-C-to-C cable connected to a spec-compliant charger, but will when using a USB-A-to-C cable. The USB-C specification requires upstream facing ports (UFPs), the port of the device receiving power, to connect pull-down resistors to the configuration channel (CC) pins. These missing pull-down resistors are a common reason why devices can draw power with A-to-C cables but not C-to-C ones.

Wouldn’t it be great to be able to add these resistors and enable USB-C-to-C power? This mod does just that. It is a small flex PCB with pads for two 5.1kohm pull-down resistors between CC1 and CC2, respectively, and GND.

Flex PCB mod for USB Type C

Designing a custom Trill flex sensor

Exciting announcement from the Bela team about a new flexible version of the Trill touch sensor:

Designing a custom flex sensor

Trill Flex brings flexible touch sensing to your maker projects. Trill Flex comes with a one-axis multitouch sensor printed on flexible PCB, but we designed this sensor to be detachable so you can create entirely custom sensors perfectly suited to your own projects.

In this tutorial we will create a custom 30-button flexible touchpad. You will learn how to set up a KiCad project and include the Trill design files, draw the pads, add a ground plane, and get your design ready to be printed. (Every purchase of Trill Flex comes with a unique discount code for $20 off flex PCB printing with our friends at OSHPark.com.)

Trill Flex is available now on the Bela shop

Designing a custom Trill flex sensor

Flexible battery tester

This flexible PCB is designed to a test battery like a CR2032 coincell. The board has cutouts to allow it to fold over the positive and negative terminals and, if the battery has a enough voltage, turn on a LED:

Flexible battery tester

Sensor Ring: a new project from Open Book creator Joey Castillo

Tom Fleets writes on Hackster about the latest prject form Open Book creator Joey Castillo:

The Newest Oddly Specific Object — the Sensor Ring — Shows Off the Latest Work From Joey Castillo!

Joey Castillo is one of those makers that not only seems to have a myriad projects continuously on the go, but also seems to actually make significant progress on them, rather than getting overwhelmed from juggling them in the air — something I’ve been known to end up doing…

With a striking resume of work that includes the Open Book, the Hiking Log, and even the more somber Big Board of Death, he’s no stranger to the pages at Hackster.io!

Keeping in following with Castillo’s focus on projects that monitor health metrics, his latest work tracks that theme perfectly, but also scales down the size of the hardware to something intended to fit within the form factor of a ring!

Sensor Ring: a new project from Open Book creator Joey Castillo

Greg Davill Sinks His Teeth Into ShArc

Tom Fleet writes on Hackster about Greg Davill’s latest adventure:

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Greg Davill Sinks His Teeth Into ShArc: A Geometric Technique for Multi-Bend/Shape Sensing.

The work of one such research project caught the eye of Greg Davill recently, when a paper written by Fereshteh Shahmiri and Paul H Dietz was published, after being submitted for the 2020 ACM Conference on Human Factors in Computing Systems (CHI 2020).

This paper goes by the title of “ShArc:A Geometric Technique for Multi-Bend/Shape Sensing,’ and proposes a novel contour sensor, comprised of a flexible, capacitive PCB sensor, a suitable capacitance-to-digital converter, and some subsequent signal processing, allowing a two-layer polyamide FPC circuit to cleverly capture the contours of the shape it is stuck to.

That’s the operation in a nutshell, so why are we covering all this here on Hackster? Well, it’s all about accessibility! This research isn’t relegated to labs where we’ll never see sight of it, until commercialized into a product. Far from it. Davill has shown just how easily we here at home can play along with this project, using the same tools and services that we’d normally look at for our own hobby projects!

He’s not only managed to recreate the capacitance to digital converter needed for this application, but perhaps more of note, he’s even turned his hand to having a go at the flexible sensor electrodes themselves, all fabricated by the one stop shop, whose services seem to keep on growing— our favorite board fab house, OSH Park!

Greg Davill Sinks His Teeth Into ShArc

Atomized Annoy-O-Tron with Flex PCB

Been working on a tiny version of the Annoy-o-tron ThinkGeek’s prank device.

My design is based on Geppetto Electronics version from tindie… https://www.tindie.com/products/nsayer/annoy-o-tron-tiny/

My version is just over 0.25in round.. so tiny! Even found a tiny piezo to go with it and 3d printed a holder for 2 watch batteries and PCB.

via Atomized Annoy-O-Tron — AtomSoftTech

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RC2014 backplane constructed with flex PCB

We were exited to see this use of a flex PCB to create a backplane for the RC2014:

RC2014 is a simple 8 bit Z80 based modular computer originally built to run Microsoft BASIC. It is inspired by the home built computers of the late 70s and computer revolution of the early 80s. It is not a clone of anything specific, but there are suggestions of the ZX81, UK101, S100, Superboard II and Apple I in here. It nominally has 8K ROM, 32K RAM, runs at 7.3728MHz and communicates over serial at 115,200 baud.

RC2014 backplane constructed with flex PCB

AtomSoft uses flex for tiny DimeDuino

From the AtomSoftTech blog:

DimeDuino

This time around i give you the DimeDuino. Its a Flex PCB based which utilizes the ATMEGA328P. Using this MCU allows for the installation of the Arduino bootloader. Hence the Duino in the name. These will come pre-programmed with the bootloader. One portion of the circle is just for programming. There is a GND, VCC,RXI, TXO and DTR & RST depending on your programmer.

As soon as its available ill post it here and on Twitter.

Specs:

  • Atmega328 running at 3.3v/8MHz or 5v/16MHz
  • Power LED (Green)
  • User LED (D13– Color may vary but mainly Blue)
  • Reset Button
  • 3.3v(AP2112K) or 5v (AP7335A) Linear step down
  • Flash 32KB (2KB is Bootloader)
  • SRAM 2KB
  • EEPROM 1KB
  • 20 I/O Pins (A6 & A7 are not used here. Input Only anyway)
    • 1 UART D0 (RX) and D1 (TX)
    • 1 SPI D10 (SS), D11 (MOSI), D12 (MISO), D13 (SCK)
    • 1 I2C A4 (SDA) and A5 (SCL)
    • 6 PWM D3, D5, D6, D9, D10, and D11
    • 14 I/O D0-D13

 

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