Hello Gents! I am looking for a 12V circuit that would close a relay, hold for around .5 sec, open for around .5 sec and then repeat three more times or so. I am not sure what this is even called. I would like to be able to adjust the close, open and repeat times probably by changing resistance... I saw CanaKits have a few timers but they do not describe them very well. Thank you for looking.