At work we are trying to identify the best material to use for our printing nozzles. They need to have good thermal conductivity and stand up to constant movement over carbon fiber, an extremely abrasive material.  Last night I made a crude but highly effective accelerated life test fixture from an inexpensive drill, timer and scraps of old counter tops.  Even the short testing I completed to verify the test fixture yielded considerable insight and I will gather more data today.

An even more impressive engineering project was Maya’s audio amplifier circuit which she demonstrated for me this morning in exchange for a 9V battery from my stash of rechargeables.