Recently I was approached by an architecture/design firm to help with an electronic install at a client site. The client had requested a system that interacts with users in the bathroom- “interacts” meaning, hassles them when they come and go.
The system has three events- enter, exit, and “loiter”, and sounds in different folders on the USB drive will be played for each event, allowing users to change the sounds later if they wish.
Motion-sensing bathroom noisemaker - [Link]
Looking to add some fancy graphics to the silkscreen on your next printed circuit board? If you’re using the totally awesome open source Kicad EDA suite, look no further!
For an upcoming project, Wayne and Layne wanted to add a QR code image link to one of our circuit boards. The image conversion tool built into Kicad had some issues, so we quickly wrote our own with the features we needed.
Adding graphics to your Kicad PCB – [Link]
This project is a temperature controller that is able to control a fan according to temperature. It’s a simple design and uses simple components. Check schematic and PCB on the link below.
0C to 150C Temperature controller – [Link]
Many microcontroller applications use time as their variable. For example, generating signals, keeping record of date and time, serial data transfer at a specific rate, etc. So, a microcontroller needs to have some internal resource to accurately measure time. One such resource is a hardware timer module, which is an independent binary counter that runs freely while the microcontroller is executing the main program. Each PIC microcontroller has at least one basic timer module called Timer0. This tutorial describes the Timer0 module and how to use it for precise time related application.
Tutorial on PIC timers and counters - [Link]
Richard Hodgkinson build a lightning distance timer that is able to automatically calculate the approach or retreat of a thunderstorm. The device is powered from two AA batteries.
Imagine you’re right in the middle of a thunderstorm; the lights have gone out, and there’s nothing better to do than time the number of seconds between a lightning strike and the thunderclap in an effort to see whether the storm is approaching or receding.
Lightning distance timer - [Link]
This project is a 7×5 LED Scrolling display based on Attiny2313. It uses easy to find components. Check schematic and PCB boards on the link below.
7×5 LED Scroller on Mini Attiny2313 - [Link]
This project is a plant watering watcher that is able to flash a LED at a low rate when the soil in the pot plant becomes too dry. The circuit uses a CMOS quad Schmitt and is powered from two AA batteries. Check schematic and PCB boards on the link below.
Plants watering watcher - [Link]
Patrick Mccabe’s build this Pong game based on Arduino board and 8×8 LED modules controlled by MAX7219CNG LED matrix driver IC from Maxim. The game is controlled using two potentiometers and is build using professionally made PCB boards. Each LED module has it’s own little control PCB. Check construction details on the link below.
DIY Pong gaming console – [Link]