I was replacing the brake light on my wife’s 2012 Mazda CX-9 and needed another set of eye’s to tell me if it was working. Problem was, everyone was still asleep.
This is v2.0 of my mailbox delivery notification system. In this version I scrap the XBee radios, and notification light for an ESP8266 and email notification of delivery. With exception of switching out the Arduino Pro Mini for an ESP8266 and an ATtiny85, all the other core components and construction are the same as v1.0.
Decent tutorial on setting up Postfix as a relay – I don’t recommend making your server publicly accessible unless you know what you’re doing. If your project does not require secure email, use a service like SMTP2go.
DPST relay (use/need is described in video).
In preparation for the solar eclipse on August 21st, I made some DIY filters for the various cameras I plan to use during the eclipse. These are low cost, but effective filters that you can make to visually observe the sun with an optic, or for video/photography.
In Part 8 I stain and apply polyurethane to the frame, make the under bed drawers and add the automatic LED night lights.
I used an ATtiny85 microcontroller with an LDR (Light Dependent Resistor) so I could have the nightlight turn on/off automatically based on light level. The LEDs run on 12v and require 1.8 amps of current (in my case given the length of strip/number of LEDs I used). A MOSFET was used to allow the ATtiny85 to turn the LEDs on/off and also allow it to control the brightness using PWM (Pulse Width Modulation).
Code and schematics (and rough Sketchup drawings of the frame) for the LED controller are available on GitHub.
After dealing with excessively long showers for too long, I set up a system to manage the amount of time our kids could effectively use the shower.
If you’ve ever been in the situation of having to run a cable from one side of the room to the other, you may find this useful.