Posts Tagged ‘electronics’

Reverse engineering…

Monday, September 22nd, 2008

So, Tom asked us to try to figure out how the circuit in the 24 switch pixel works. It’s an array of 24 physical switches arranged in three banks of eight switches which enable the user to control an RGB LED in a manner similar to 24-bit digital color.

He told us that the circuit was entirely analog without any microcontroller. We had worked with parallel switches so that implied a hint to me as to how the circuit was able to vary the current.

This exercise took me a long way, only to end up very close to the beginning.

So, I knew that the switches were designed to act like bits of binary data: (more…)