We love PCBs, so we were excited to see this beautiful circuitry from Lumen Electronic Jewelry:
Fashion Gets Geeky
Lumen is the creation of Robin and Marty Lawson in Madison, Wisconsin:
We’re life-long tinkerers, siblings, and fourth generation mechanical engineers.
They’ve designed soldering kits for all levels: beginner, intermediate, and advanced surface mount soldering. This heart is an example of an intermediate kit:
Lumen also makes beautiful fully-assembled LED jewelry:
Solar powered twinkling LED jewelry. No batteries, hours of blinky.
We particularly like this twinkling fiberglass cephalopod:
Each octopus has 16 amber LED lights throughout the arms connected to 12 tiny solar cells. So your necklace will charge and blink all on its own, no batteries required.
Robin tells me that they use Free PCB for layout:
Robin informed me that they laser their own stencils out of thin mylar sheets at their local Makerspace, Sector 67:
They then bake the board in a toaster oven:
Robin explains that afterwards they clean the boards in an orange -based degreaser then seal in a ResinLab epoxy
It is expensive but has a long working life, excellent hardness and optical clarity, as well as UV resistance to yellowing.
P.S. Here’s an insightful talk that Robin gave at TEDxMadison last year:
Luke Weston created this DIY radar board:
A basic radar system makes radar accessible at low cost for experiments with rangefinding & navigation of autonomous aircraft or spacecraft.
Knudt designed this board to connect an inexpensive dual-band GSM module with to an Orange Pi or Raspberry Pi:
The config files and EAGLE design files can be downloaded from the Hackaday.io project:
Paul Stoffregen of PJRC designed this shield as a Kickstarter reward earlier this year:
Please understand this shield has very limited software support at this time. However, Manitou’s early benchmarks show excellent performance we can someday hope to achieve as the software matures.
PaulStoffregen has shared the board on OSH Park:
The source code is available on GitHub:
Bill of Materials:
Qty Part Digikey
--- ---- -------
1 LAN8720A LAN8720A-CP-CT-ND
1 CAT811T CAT811TTBI-GT3OSCT-ND
1 Crystal, 25 MHz 535-13419-1-ND
1 Transformer, Pulse H1102FNL 553-2204-1-ND
1 Connector, RJ45 A102068CT-ND
1 Capacitor, 1nF, 2000V 709-1036-1-ND
2 Capacitor, 33pF 490-5936-1-ND
1 Capacitor, 470pF 490-1297-1-ND
3 Capacitor, 10nF 445-1260-1-ND
1 Capacitor, 22nF 490-8022-1-ND
3 Capacitor, 1uF 399-5090-1-ND
1 Resistor, 33, 1% 311-33.0LRCT-ND
4 Resistor, 49.9, 1% RMCF0402FT49R9CT-ND
4 Resistor, 75, 1% RHM75.0HCT-ND
2 Resistor, 330, 1% 311-330LRCT-ND
1 Resistor, 1.5K, 1% 311-1.50KLRCT-ND
2 Resistor, 12.1K, 1% P12.1KLCT-ND
1 Inductor, Ferrite bead 553-2387-1-ND
2 LED, Green 475-1410-1-ND
From the Facelesstech blog:
Normally you would use through hole then either have a 90 degree headers or just bend them over. [..] I had a brain wave, why don’t I lie the header down flat on the board and solder it to a SMD pad
The design files are available on GitHub:
Mike Rankin created this board with a tiny OLED display controlled by an ESP8266:
I created this design as a challenge to make a design under 1″ x 1″ in size.
The hardware is an ESP-01 ESP8266 Wifi module, linear power supply, microUSB connector and a few oled display parts.
The design files and source code are available on GitHub:
Here is a video of the assembly and operation:
miker has shared the board on OSH Park:
ESP32-WROOM-32 modules are in stock now! Again these are from the very first lot and with limited supply. To give chances to more developers to try them we will not allow more than 3 modules per order. This module is good only if you develop your own board. For these who are not good with […]
via ESP32-WROOM-32 WiFi/Bluetooth module is in stock! — olimex
ORCONF 2016 was held earlier this month in Bologna, Italy:
ORCONF is an open source digital design and embedded systems conference, covering areas of electronics from the transistor level up to Linux user space and beyond. Expect presentations and discussion on free and open source IP projects, implementations on FPGA and in silicon, verification, EDA tools, licensing and embedded software, to name a few.
Begun as the annual OpenRISC developers and users conference, it has become a broad open source digital design-oriented event and is supported by FOSSi – the Free and Open Source Silicon Foundation.
Elkim Roa spoke about OnChip, an Open Source silicon microcontroller, designed by his research group at UIS (Universidad Industrial de Santander):
The slides are available as PDF on GitHub:
OnChipUIS has several repos on GitHub related to the project including:
mriscv: A 32-bit Microcontroller featuring a RISC-V core
We’re big fans of podcasts about electronics and embedded systems like The Amp Hour, embedded.fm and The Spark Gap podcast. (Please let us know in the comments of other shows we should check out)
In the latest Spark Gap episode, Karl and Corey talk about their trip to Portland for the 2016 Open Hardware Summit:
Our favorite past episodes include the two-episode discussion of PCB design:
We also enjoyed when Karl and Corey were joined by James Lewis of Kemet Electronics to talk about capacitors.