Previous posts for this project:
- [CaTS] ForgetMeNot - Index
- [CaTS] ForgetMeNot - Week 0: Project Description
- [CaTS] ForgetMeNot - Week 1: EnOceanPi and Sensors
- [CaTS] ForgetMeNot - Week 2: Elro CoCo and Pi Cam with OpenHAB
- [CaTS] ForgetMeNot - Week 3: Data persistence and charts with OpenHAB
- [CaTS] ForgetMeNot - Week 4: Arduino-OpenHAB communication
- [CaTS] ForgetMeNot - Week 5: Getting familiar with EAGLE
- [CaTS] ForgetMeNot - Week 6: Getting to know the TBS1052B-EDU oscilloscope
- [CaTS] ForgetMeNot - Week 7: First tests with RPiSoC
- [CaTS] ForgetMeNot - Week 7 (2): More testing with RPiSoC
- [CaTS] ForgetMeNot - Week 8: Water dispenser and temperature
- [CaTS] ForgetMeNot - Week 9: RFID Cat detection and identification
- [CaTS] ForgetMeNot - Week 10: Peltier cooling experiment
- [CaTS] ForgetMeNot - Week 11: Starting the build
- [CaTS] ForgetMeNot - 3D Printing: EnOcean sensor bracket
- [CaTS] ForgetMeNot - 3D Printing: EnOcean rocker switch and magnet holder
- [CaTS] ForgetMeNot - 3D Printing: Food dispenser prototype
- [CaTS] ForgetMeNot - 3D Printing: Weighing scale
- [CaTS] ForgetMeNot - Security: Some basic tips
- [CaTS] ForgetMeNot - Minion: Dave, the gassy minion
- [CaTS] ForgetMeNot - Pi Camera: Wide Angle Lens
Introduction
Stress level is increasing as the end of the challenge is merely a little more than a week away and there is still so much to be done!
Today, I continued working on my build and managed to make some progress. I also had some pending circuits to be soldered.
Build
Last time, I worked on the front side of the build. Today I started the back side.
I installed the brackets holding the reservoirs in place and cut side panels. The whole thing has also been put on wheels, making it slightly easier to move around.
Finally, I cut a plexi back panel which can slide into place. This makes it easy to remove in case electronics need to be accessed.
Some points still to be tackled:
- install reservoirs and ensure dispensing in bowl
- install electronics
- finish and paint the build
I have already prepared some spacers for the electronics, So I should be able to just screw everything in place using the mounting holes.
Circuits
There are 2 little circuits that were still waiting to be done some day. And today, was that day.
The first circuit is just a little power splitter.
Taking input from the power supply via a little screw terminal, the splitters offers 3 USB ports and 3 screw terminals to connect devices to.
I didn't need that many, but at least the system is ready for possible expansion 
The second circuit is a GPIO splitter.
With different modules for the Raspberry Pi, making use of different pins on the GPIO header, I made my own custom Pi rack.
The circuit provides connectivity for the Raspberry Pi GPIO and splits it to:
- Power + I2C for my custom RF433 transmitter with ATtiny85
- Power + UART for the EnOcean Pi
- Power + SPI for the RPiSoc.
That's it for this update, off to get more done before the end of the challenge ...
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