I have a 16 VAC circuit which when closed operates an electro-mechanical solenoid causing its plunger shaft to hit a bell/chime. Since the switch on this circuit is an automatically controlled relay that may cause the circuit to stay closed from 1 - 5+ minutes, this causes the solenoid to stay energized for too long (bad for its power supply as well as for the solenoid). Furthermore, I only get 1 "ding" sound no matter how long the 16 VAC circuit is closed.
I would like to get multiply "dings" from the solenoid at a low duty cycle (i.e., a "ding" every 60 seconds or so) and have it user adjustable. I have found that the MK111 Adjustable Interval 555 Timer module would probably satisfy my needs for controlling the timing of the circuit. See following url: http://www.vellemanusa.com/products/view/?id=350686
My problem is that the MK111 requires a 12-15 VDC power supply for its circuitry. In order to provide this, I am thinking about tapping into the 16 VAC circuit (parallel connection) and adding a full wave bridge rectifier. The bridge rectifier specs state it has a 1.1 V drop across each leg. Therefore, I presume the resulting voltage would be 14.9 VDC, but it will not be very smooth. Would the uneven VDC harm the MK-111 or cause it to malfunction?
How smooth/regulated must the power supply be to the MK-111?
Thank you for your thoughts on this matter.
I would like to get multiply "dings" from the solenoid at a low duty cycle (i.e., a "ding" every 60 seconds or so) and have it user adjustable. I have found that the MK111 Adjustable Interval 555 Timer module would probably satisfy my needs for controlling the timing of the circuit. See following url: http://www.vellemanusa.com/products/view/?id=350686
My problem is that the MK111 requires a 12-15 VDC power supply for its circuitry. In order to provide this, I am thinking about tapping into the 16 VAC circuit (parallel connection) and adding a full wave bridge rectifier. The bridge rectifier specs state it has a 1.1 V drop across each leg. Therefore, I presume the resulting voltage would be 14.9 VDC, but it will not be very smooth. Would the uneven VDC harm the MK-111 or cause it to malfunction?
How smooth/regulated must the power supply be to the MK-111?
Thank you for your thoughts on this matter.