Welcome to the Portlet page! Scroll down for downloads
The name Portlet is a portmanteau: Programmable + Outlet = Portlet
Originally built on the Arduino platform, the Portlet is a convenient way to control outlets. It is currently built to plug into a common Nema 15, 110 VAC wall outlet and provide two relay-controlled outlets.
Additionally it has two thermocouple inputs. There are so many applications involving outlets and heat that it just made sense to include these.
The UI consists of 4 buttons (plus one Reset button) and a simple 2×15 character LCD screen.
The number of applications for this little device is pretty impressive! Hopefully this inspires and enables you to create many fun projects.
And if you DO create fun projects, be sure to document them and share them in the comments!
Please remember; the Portlet consists of 2 boards: the Power board and the Controller board. The Power board converts 120 VAC to +5 and controls the 120 VAC outlets. The Controller board is powered by +5 and holds all of the user facing components for safety. Several different Controller boards have been designed and tested using your favorite programming interface.
Here are a bunch of resources for the Portlet:
Portlet Power Board 1.0:
The first rev of the Portlet Power Board uses mechanical relays to control the 2 outlets and supplies +5VDC. The 4 pin connector going to the Controller board is:
- Digital control of Outlet 1
- Digital control of Outlet 2
The 2 digital controls are expecting a +5 V signal from the controller board to engage the relay allowing power to flow to the controlled outlet.
Arduino Portlet 1.0 (Controller board and Power board):
Rev 1 is a fully tested design working with an Arduino Pro (5V version) as the brain. All the components that are spec’d are through hole parts for easy soldering as this was intended to be a DIY kit.
- Arduino Portlet v1.0 Controller Board Eagle files
- Arduino Portlet v1.0 Controller Board Gerber files
- Parts List Portlet 1.0
- Assembly instructions
CAD .STL files for download (if you want to 3D print your own case. However, if you purchase from here you are gratefully helping to fund the project … ):
Links to sample code on Github:
- Code for all the below projects hosted on Github
- Document describing what the “Testing Code” is doing for confirming a good build
PDF Tutorials / Project ideas
- Yoghurt Tutorial
- Beer brewing
- Brewing Temperatures Tea and Coffee
- Soldering Iron Safety
- Using Portlet for a Reflow Oven
- A random list of possible project ideas
Photon Portlet 1.0 (Controller Board only):
This version was all about going wireless! Instead of an Arduino, the Spark Photon is now the brain!
To achieve this build, we purchased the Spark Photon Kit then we just had to rearrange the traces on the board. All the other components used are the same (so it’s still all through hole components)
FYI: This still uses the Portlet Power Board 1.0. So if you had built an Arduino Portlet 1.0, you can just build a new Controller board and swap it in there; they are interchangeable!
The Spark website has a ton of info about programming their board. Using their published demo app, here is a YouTube video showing control of the Portlet
Linkit Portlet 1.0 (Controller Board only):
Linkit has produced a super powerful board! We made a new Controller Board design for the Portlet based on the powerful LInkit Smart 7688 Duo board. We made it a direct swap for the Arduino Pro board so all of the sketches posted in the Arduino Portlet 1.0 section will work with no modification!
This works with the Portlet Power Board 1.0 and the same parts list (except you swap out the Linkit module for the Arduino Pro)
Note: The Linkit digital outputs produce 3.3 V. The Sparkfun LCD requires 5V so the the backlight doesn’t work with the Sparkfun LCD (unless you modify it). However, the Jameco LCD seems to work fine with the 3.3 V output
Another note: the footprint for JP1 in the below files is a 6 pin but only pins 1-4 are being used so make sure you put the 4 pin connector in the correct pins.
- Linkit Portlet logic v1.0 Controller Board Gerber files
- Linkit Portlet logic v1.0 Controller Board Eagle files
- Linkit Portlet 1.0 Assembly instructions
If there is enough demand, the next rev of controller board will most likely be an SMT version of Portlet so we can offer it preassembled. But … it hasn’t been done yet …
Some other thoughts for future revisions:
- Solid State relays
- Dimming circuit for outlets
- Current monitor on outlets