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29-04-2017 #1
Hello all,
I've been meaning to make this for a while - it's a laughably simple project (for all but the electronics simpletons like myself).
So, I'm going to base my circuit on this one:
http://www.555-timer-circuits.com/flashing-led.html
...except I'll be using a 12v PS and one of these instead of an LED:
R1 and R2 control the speed at which the LED flashes - or rather (I'm hoping) the solenoid will open and close - as it is, the led flashes rather quickly - I'm planning to replace these two resistors with a couple of linear pots so that I can adjust open/close times - any recommendations for pot values I should be looking at..?
Also, the cap value? As I'm using a 12v supply will I need to change the cap - what difference would a different value make to this circuit?
Finally, will this work..?! Have I correctly assumed that R1 and R2 are independently controlling open/close times?
Any advice appreciated..!
Wal.
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