With 2C cells, your end of life voltage is about 2V. I would build a flasher using a CMOS 555 timer that runs down to about 1.5V driving the LED.Hello
I tried a search first but could find nothing to match my needs.
I would like to build a dark activated LED; Red, Green or bright white. It would be used for buoys for R.C Boat runs, so they would be in water.
I would like a circuit that would allow me to set the LED to flash and I set the rate OR leave them on constantly until light. It would work off of either a 9v or 2 C cells (good ballast weight).
Any help would be appreciated and I need the circuit to be as physically small in size to fit in the to be build bouys.
Thanks in advance for your help.