Sorry, but that was my typo. Of the four comparators in the LM339, I started with comparator #2, which indeed used pins 1,6, & 7. I then tried using pins 2, 4, & 5 which is for comparator #1, and got the same results in that 1) the relay is energized as soon as the power (6 volts) is applied, whether any input is attached or not, 2) the flash will only fire if flash ground is attached to input pin, and flash positive is attached to the circuit ground, and 3) when the input voltage goes to zero, the relay does not de-energize.
Short of trying a new chip, can you think of anything else why these items are happening?
Short of trying a new chip, can you think of anything else why these items are happening?