Category Archives: Raspberry Pi ‘Zero’
Streaming Video with the Raspberry Pi Zero W & Pi Camera
I needed a really tiny yet cheap camera so I thought of the Raspberry Pi Camera module. The Version 2 Camera Module does 8MP with good quality, although a 5MP IR-Cut Camera better suited my needs.
About the IR-CUT Camera
The IR-CUT Camera works on Normal Mode by default. There are two ways to toggle between Normal Mode and Night-vision Mode.
1. By editing the config.txt<code> file:
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sudo nano /boot/config.txt |
and append:
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disable_camera_led=1 |
exit with save and restart your Pi then the camera will work on Night-vision Mode.
Make a “Safe Shutdown” Button for Raspberry Pi
Pulling the power to your Raspberry Pi can cause image corruptions & other issues that can damage your Pi! In this article, we will create a small push button that will work as a ‘Safe-Shutdown’ option. We’ll connect it to our Raspberry Pi using the GPIO pins and some jumper wires, and with a few lines of code, we will have our own power switch!
First, we are going to look at a simple way to wire a button to the Pi GPIO connector. We will then write a python script that will shut down the Pi safely. The final step will be to setup the Pi so that the button will work all the time. Let’s Get started!
What you will need:
- Raspberry Pi B+ (Any Pi will work, Just make sure you check the GPIO pins)
- Tactile Switches
- Female/Male Extension Jumper Wire Packs
- Solderless Breadboards
THE CIRCUIT
To do this we will wire the button to GPIO Pin 26(Yellow wire) and to ground (Green wire). This configuration is called an Active Low button, this means that when the button is pushed it will have no voltage or be logic low. The Pi has pull-up resistors on its GPIO pins so wiring active low mean we do not need to add an external resistor.
Raspberry Pi “Zero”: HDMI Monitors Has NO SIGNAL
When connecting a Raspberry Pi ‘Zero’ for the first time to a TV monitor with HDMI, and receive the message: “No Signal”. I tried it on several inputs and cables with no luck. Other devices work fine with the TV, and the cables so there can not be the problem. Then I tried a computer monitor with HDMI, also with no luck. What is happening?
I’ve investigated the problem for a couple of hours, before finding the solution.
The Raspberry Pi ‘Zero’ outputs a relatively weak HDMI Signal. Some devices may not immediately notice the Raspberry Pi ‘Zero’s HDMI Signal, or may not go through the negotiation process.
