Low-Tech Sensors and Actuators

Every now and then you hit a single sentence that makes your brain explode.

Usman Haque and Adam Somlai-Fischer (pdf): Like many other artists and architects working in the field of interactive environments, in cutting costs and development time we often had to resort to a "low-tech" approach, rewiring keyboards to get pressure-pad input into computers, or using the monitor with light sensors and relays to get physical output from computers.

Talk about opto-isolated!

Via [nat].