Robert on hackaday.io designed this upgrade for a cheap TP4056 Li-Ion charger board:
I wanted to have a load sharing for my future battery operated project with the ability to charge the battery. There is a load of cheap TP4056 boards from China. None of them has the load sharing or voltage regulator on board so I made my own addon board.
Smrtokvitek has shared the board on OSH Park:
DanR has shared this motion sensing night light board:
This light is powered by an ATtiny45/85 which powers on the 14 LED lights when motion is sensed and it is in a dark room. The light sensor on the board will not allow the lights to come on if it is in a reasonably lit room.
It is fitted with a barrel plug for power, this model specifically with an L7805CV voltage regulator.
Alan Mitchell designed this board to interface 1-wire sensors to a Raspberry Pi computer:
This board is part of Alan’s Raspberry Pi data collection system:
The Mini-Monitor software is data acquisition software that runs on a Raspberry Pi computer. It is designed to post the collected data to the BMON web-based sensor reading database and analysis software, but the software can be modified to post to other Internet databases. The Mini-Monitor software has the ability to collect data from a number of different sources
Barbouri has updated his voltage reference board design:
This is my version 2 board update, which incorporates supply voltage regulation, over-current protection, and trimmer for the 5.000 volt reference all on the same board.
The new board uses a LM2937IMPX-10, which is a positive linear voltage regulator IC with a 10V output at 400mA in a SOT-223-4 package.
Barbouri has shared project the project on OSH Park:
Carlos Vadillo and Bx Dawes created the GlowSaber project to help kids in Alameda learn about physics, engineering and programming:
Building the GlowSaber main board
All the logic, sound and light effects of the GlowSaber are performed by a small microprocessor board. In this tutorial I will explain, step by step how to put together the main board of a GlowSaber.
One premise that I had while designing the GlowSaber was that I should be able to build all of it with tools that I already have. That limited the materials I could choose to those that I could cut, drill and glue with just the basic tools:
The GlowSaber uses a Vollong 3 watts RGB LED. It is very bright and more than enough to light the length of the blade. When designing the GlowSaber I found that I needed a way to connect the LED to the main PCB and I designed a LED break out
How to use a potentiometer to change the behavior
The GlowSaber has a switch assembly, that controls the on/off functions. It also has a LED to show that the GlowSaber is ready to start, and finally has a small 1 kΩ potentiometer. The following is a schematic of the switch assembly:
cvadillo has shared the board on OSH Park:
Black Mesa Labs has an ongoing mission to develop easy to use and fully capable open-source hardware and software tools that make engineering electronics easier
Video of SUMP2 logic analyzer:
BlackMesaLabs has shared an adapter board on OSH Park:
5V Input Adapter for the $22 SUMP2 iCEstick 96 MSPS LogicAnalyzer
al1 created this remake of the old Texas Instruments TIL305 display with tiny surface mount LEDs:
TIL311 had a alphanumerical brother the TIL305. This was a 5×7 LED matrix in the same form factor
Here is a video of reDOT in action:
https://www.youtube.com/watch?v=RD-I2zbS2iU
ALKR has shared the board on OSH Park:
ronald.sutherland created this driver board for a latching solenoid or relay coil:
three half bridge and a common half bridge that can be used to discharge a (9V/12V/24V) capacitively stored charge into a latching Solenoid or Relay coil
The design files are available on GitHub:
epccs/Driver/K3
epccs has shared the board on OSH Park:
Combo board for the Raspberry Pi with IR receiver and transmitter along with Real-Time Clock and coin cell battery:
I needed an IR receiver for my Raspberry Pi which I use as an internet TV receiver [..] Solution: make my own.
kentauta has shared the board on OSH Park:
Dean Gouramanis is building a wearable Bluetooth-enabled Arduino Pulse Oximeter:
bluetooth-enabled wearable device can measure Pulse Oximetry, and ambient CO2 24/7
The board is shared on GitHub:
dgouramanis/CRHM
OSH Park 