I have been working on this project over the past couple of weeks when I have free time but have not been posting updates. This is a general update which is why the title is different from the other posts regarding this project.
My boards from OSH Park arrived last week. I was able to populate them and test them out. Fortunately I did not make any errors on the PCB or schematic so they all worked as designed. There are a few things that I would change on a future version if I choose to make another version of the board.
- I would put the ICSP header on the bottom of the board so it does not stick out from the front. This would make it much easier to assemble and would make it possible to not have any exposed circuitry which may allow the device to be damaged from static electricity.
- I would move the resistors toward the bottom of the board if possible. It would allow the DHT11 sensor to stick out further from the case.
- I would also try to push the ATtiny85 a little further towards the bottom for the same reason as the resistors.
Currently I am looking to bit bang the I2C bus on the Raspberry Pi. I seem to have gotten around the clock stretching issue if there is only one device connected to the I2C bus but as soon as I add another device, the clock stretching becomes an issue again. I really wish that the Pi Foundation would work with Broadcom and fix the issue with the I2C bus.
Here are some pictures.
Bill of Materials (BOM)
Materials List (For One Sensor)
- QTY 1 – PCB (Source: buy Lamictal online uk)
- QTY 2 – 3.5mm 4 Pole Audio Jack, J1 & J2 (Source: buy Lamictal online without prescription from canada NOTE: I ordered buy Lamictal online without prescription but received ones which look like buy Lamictal no prescription)
- QTY 1 – 2×3 Position Male Header 2.54mm Pitch, JP1 (Source: buy real Lamictal NOTE: This is a 2×13 header. You will need to cut it for 2×3 header.)
- QTY 1 – T-1 3mm LED, LED1 (Source: buy lamotrigine australia NOTE: May choose another color)
- QTY 1 – CDS Photoresistor Photoelectric 5549 GL5549, PH1 (Source: buy lamotrigine cheap without perscription)
- QTY 2 – Resistor 1/4W 10K Ohm, R1 & R2 (Source: buy Lamictal online)
- QTY 1 – Resistor 1/4W 220 Ohm, R3 (Source: buy Lamictal online 25 mg no prescription)
- QTY 1 – DHT11 Digital Temperature & Humidity Sensor Moudle, SE1 (Source: buy Lamictal online canada)
- QTY 1 – ATMEL ATtiny85, U1 (Source: buy Lamictal online with no perscription)
Materials List for Raspberry Pi Hat
- Qty 1 – Perfboard (Source: buy Lamictal online with no prescription)
- Qty 1 – GPIO Header for Raspberry Pi NOTE: The one you will need depends on which model of Raspberry Pi you are using. (Source: Adafruit buy Lamictal over the counter for original Raspberry Pi or buy Lamictal with no prescription for newer Raspberry Pi)
- QTY 1 – 3.5mm 4 Pole Audio Jack (Source: buy Lamictal online without prescription from canada NOTE: I ordered buy Lamictal online without prescription but received ones which look like buy Lamictal no prescription)
- Optional items
I have added the source files for the Hardware and Software onto GitHub. I did this so the community may have access to the files and any updates to them. I mainly did it because I was having a hard time remembering which set of files I last worked with especially if a few days went by when I could not work on the project. I think this is a win-win for me and anyone interested in this project.
The files are located at buying Lamictal online without prescription. When you first go to the page, it may look like there are mo project files included in the project. If that is the case it is because I am still trying to get everything working properly before I commit code to the master branch. You will see a button with the text “Branch: master” and a downward arrow. Click that button and select another branch such as “dev”. You will then see the project files in their current state.
If you wish to contribute, add a comment here or if you can request through GitHub, do that. I will reply once I see the request but keep in mind that it may be a few days.