Light Painting

David built a multi-color light pen using a tri-color LED and some switches and a battery scavenged from various devices fed into the disaggregation machine in the basement. Shot in near total darkness at ISO 3200 with shutter open for drawing duration.

Cork Cannon

An excellent cork cannon made with a $15 irrigation system valve (24VDC); must be used only with great caution and supervision. We're working on a timer circuit using an MM74C926 counter IC in an effort to measure the velocity of a cork in the barrel.

DC Motor Controller

A DC motor controller from Futurlec providing speed and rotation direction control. A very nice product for only $20.00. I plan to use two of these for the port and starboard decent motors. The primary decent motor on the bottom will be connected directly to an on board battery via relay board also from Futurlec.

Connectors

Bulgin IP68 six terminal connector mounted on the bottom plate of the pressure chamber bulkhead. Room for three more connectors is available.

80 Watt Audio Amplifier

David built a new 80 watt audio amplifier replacing the earlier circuit that we accidentally shorted out with loud and smoky results (see earlier post). Note the large heat sink on the left and the component board on an acrylic panel as this will be incorporated into a larger acrylic pyramid housing that we've constructed. We tested the circuit with an iPod source and successfully drove a test speaker array with Ozzy at a very high volume.

Updated ROV

A view of the ROV updated with additional down propulsion motors (two pushing up & one beneath the chamber pulling down) and the new pressure chamber.

New Electrolysis Cell Design

A new design with an acrylic divider to separate the hydrogen & oxygen. The hydrogen flows through the tube on the right. In the rear is a partial view of a manifold assembly to collect output from four cells.

Combustion Test

Ignition of gas (hydrogen & oxygen) produced by the electrolysis cell with sodium bicarbonate as the electrolyte solution inside an Aquapod.

Electrolysis Cell

An electrolysis (of water) cell with dual electrodes.

Zoomer