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Raspberry Pi Projects

8 Posts authored by: cmelement14
Unfortunately I couldn't finish the project before Halloween because I moved recently and didn't bring the right tools with me. However, I will continue the build and blogs. Different from my last blog Step by Step Build Trick or Trivia Halloween Candy Dispenser #4 - LED blink test, GUI Interface, today I will blog the build of audio amplifier.     Usually the sequence when I manually solder components is from low profile parts to high profile parts. To get a good sense of the solderi ...
While I am waiting for answers about starting Python interpreter in privilege mode mentioned in my previous blog Step by Step Build Trick or Trivia Halloween Candy Dispenser #3, I'd like to continue my journey. This is going to be a short blog about how I work on LED blink.   I wrote a small piece code LED_Blink_Test.py which blinks LED(toggling red/green LEDs every second) until I hit the enter key. It works as expected. import RPi.GPIO as GPIO import time import sys import select GP ...
Following my previous blog Step by Step Build Trick or Trivia Halloween Candy Dispenser #2, I will start with the Python GUI in this blog.   I got the LCD display work and I can SSH to my Pi 2 in the last two blogs, so I decided to try out Python GUI code in the SSH session. However, it didn't work. I thought I could create a widget on the LCD by typing Python code root=TK() in SSH session. Obviously, I was wrong. pi@candydispenser1 ~ $ pi@candydispenser1 ~ $ python Python 2.7.3 (defaul ...
Following the previous blog Step by Step Build Trick or Trivia Halloween Candy Dispenser #1, I will start from configuring WiFi. I used a couple of links to help me set up Wifi: https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md and How-To: Add WiFi to the Raspberry Pi | Raspberry Pi HQ. Basically you need add a new network in /etc/wpa_supplicant/wpa_supplicant.conf file like this network={     ssid="your router ssid"     psk="wifi p ...
This series of blogs will show how I build theTrick or Trivia Halloween Candy Dispenser project step by step following Charles_Gantt's series of blogs Trick or Trivia Halloween Candy Dispenser #001 - Project Introduction.   First of all, thank element14Dave & element14 for giving me this opportunity. I received my kit a few days ago. Below is what in the box.   I noticed that the kit includes a 4GB SD card instead of microSD card, so I have to find myself a 8GB micro SD card as ...
In Part II: OS Configuration and Software Installation & Update, I showed how I configured the OS and installed software. In this part III, I will show the problem of SHIM and how I made it work.   To test the kit, I first tried cgps program a few times and each time the program timed out and quit in a couple of seconds. Basically there was no GPS fix at all.   Then I tried to print GPS message but still no luck. I issued poweroff command to brought down the kit and started tro ...
In the first part Step by Step Building the Raspberry Pi 2 GPS Geocaching Kit - Part I: Put Hardware Together, I recorded how I put the hardware together step by step. In this part, I will show the basic OS configuration and software installation & update.   After the first time boot-up completes, the Pi 2 will automatically run raspi-config program (you can always run this program again after first time boot-up by typing command sudo raspi-config). In this configuration interface, you ...
Thanks to the Geocaching community and Christopher Stanton. I am one of the Winners of  10 Raspberry Pi 2 GPS kit. The kit arrived at my front door on Aug. 7th, 2015. Since then, I followed Chris' blog Putting Together the Pieces - Raspberry Pi 2 GPS Geocaching Project and built up my kit. In general, it's a quite smooth process except like many others, I ran into the SHIM connection problem as well. In this blog, I will show my procedure step by step with lots of pictures and screen captur ...

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