This is another card made by the Circuit Scribe conductive pen, which can play a song and flash the LEDs. The circuit is based on the Attiny85 microcontroller to make the sound and control the LEDs. The microcontroller only has 5 useable pins, 1 for the buzzer (speaker) and 4 for the LEDs, so there are total of 12 LEDs which can be controlled with 4 pins using the Charlie-multiplexing method. Continue Reading..
This is my present for my love for this Valentine day. I was always want to build a circuit on a paper craft, but I don’t like to mess with the wiring. Until I found a solution: the Circuit Scribe conductive pen, which allows you to make an electronic circuit on a paper ! But to build a practical circuit (not just to turn on a LED), this mighty guy will do the heavy work: the Silhouette Portrait. It’s basically a 2D plotter and cutter, just mount the pen in there, load the circuit traces and click the “Cut” button. The circuit is designed using Altium Designer, which all components are surface-mounted and the trace width is set as 0.6 mm.