Help with a momentary circuit

Thread Starter

stf5060

Joined Oct 5, 2011
11
hmmmm creepy haha, but ok so why do R1 and D2 need to be exchanged? How would I calculate the different resistor and capacitance values to change the times that the valve or motor is activated for? This http://home.cogeco.ca/~rpaisley4/LM555.html#2 gave a calculator on what values to use for different times, but I'm assuming that no longer works since this is a little more complicated? And what is the maximum wattage I need to get these parts rated for? I thought since it would be 24v and .3 amps I'd need at least 8W? Thanks
 
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