The LED parts box disgorged some single-color Pirhana-style LEDs:
Didn’t quite catch the blink, but the
Ping-Pong ball radome lights up just as you’d expect.
The radome sits on a stripped-down RGB LED spider:
The circuitry is the same as the First Light version, with a 1 MΩ resistor stabilizing the LED ballast resistor:
Those are 1 µF ceramic caps in the astable section, so I’m no longer abusing electrolytics, and a stylin’ 100 nF film cap metering out the LED pulse up above.
Just for pretty, I’ve been using yellow / black wires for the battery connections and matching the LED color with its cathode lead.
The OpenSCAD source code as a GitHub Gist: