Jeremy g. on hackaday.io created this tiny retro clock:
Super tiny, Micro clock using a Numitron as its display. Running off a 400mAh lipo battery.
has shared the design files and source code are on GithHub:
The assembled version is available on Tindie: NumiClock Mini
Electrical Engineer Jenner Hanni (of OSH Park and Wickerbox Electronics) designed a protoboard DIP for the Next Thing Co. C.H.I.P. (“The World’s First Nine Dollar Computer”):
for when you need something more durable than a breadboard
The KiCad schematic and layout are available at the Github repo. The project is released as Open Hardware under the CERN Open Hardware v1.2 License.
This project was created using the CHIP DIP KiCad template from Wickerlib. The protoboard holes are connected where indicated by exposed copper, for easier wire routing and soldering.
Jenner has shared the board on OSH Park:
$17.50 for a set of three
Bill of Materials
For a non-stackable version, you can just use two standard 0.1” (2.54mm) pitch 1×40 headers, each snapped in half.
For a stackable version, you can use two of these extra-tall 2×20 female headers from Adafruit. The connectors are from the Samtec SSQ family so you could shop around for other distributors, but Adafruit has by far the best price for this particular component.
This project is released under the CERN Open Hardware v1.2 License.
Rafael Riber created a retro watch with HP QDSP-6064 Bubble display like 1970’s HP calculators:
The display is controlled by an Atmel ATMega328P-AU MCU with Arduino code, and the time is kept by a Maxim DS3231 Real-Time Clock module, that stays connected to the LiPo battery at all times, keeping time even when the microcontroller and display are not powered.
RafaelRiber shared the board on OSH Park:
created a tiny weather station based on the ESP8266:
Push the measured temperature, humidity, pressure and battery voltage to the cloud or local servers in defined intervals. Configuration is done by using a simple web browser.
MalteP has shared the board on OSH Park: