Hey guys,
I am running a very simple circuit with a Amperite HDFA Timer turning a relay on and off which in turn activates a vibrator motor. I'm using a 30A adjustable DC power supply. Anyways, when the timer turns the vibrator motor on the relay makes a buzzing sound (not just the click like normal). I'm wondering if anybody has any clue as to why I'm getting this chatter and what a possible cause/solution might be. The schematic is below.
Timer: http://www.amperite.com/assets/Documents/hdfa.PDF
Relay: Simple 12V SPDT Relay
PS: http://www.bkprecision.com/products...high-current-dc-power-supply-0-32v-0-30a.html
I can't find the specs on the vibrator motor but it is just a simple electric motor that rotates two counterbalanced disks to vibrate. It pulls 4-5A, more if you push down on the vibrator or put a load on it that makes it harder to vibrate.
Let me know if there is anything else you guys need to know. I'm going to keep digging on this myself but google is providing me with a lot of AC relay chatter and not a whole lot on DC and then the people just say it's because voltage isn't high enough over the coil but I've got my PS set at 13.5V since that is what the vibrator motor runs on normally.
EDIT: By the way, the only reason I'm running a relay with the timer is so I don't have to run the vibrator motor current directly through the timer. Those things aren't cheap and it is possible for the vibrator, under a very large load, to pull 9-10A so I'd just rather not risk it.
Thanks!
Dan
I am running a very simple circuit with a Amperite HDFA Timer turning a relay on and off which in turn activates a vibrator motor. I'm using a 30A adjustable DC power supply. Anyways, when the timer turns the vibrator motor on the relay makes a buzzing sound (not just the click like normal). I'm wondering if anybody has any clue as to why I'm getting this chatter and what a possible cause/solution might be. The schematic is below.
Timer: http://www.amperite.com/assets/Documents/hdfa.PDF
Relay: Simple 12V SPDT Relay
PS: http://www.bkprecision.com/products...high-current-dc-power-supply-0-32v-0-30a.html
I can't find the specs on the vibrator motor but it is just a simple electric motor that rotates two counterbalanced disks to vibrate. It pulls 4-5A, more if you push down on the vibrator or put a load on it that makes it harder to vibrate.
Let me know if there is anything else you guys need to know. I'm going to keep digging on this myself but google is providing me with a lot of AC relay chatter and not a whole lot on DC and then the people just say it's because voltage isn't high enough over the coil but I've got my PS set at 13.5V since that is what the vibrator motor runs on normally.
EDIT: By the way, the only reason I'm running a relay with the timer is so I don't have to run the vibrator motor current directly through the timer. Those things aren't cheap and it is possible for the vibrator, under a very large load, to pull 9-10A so I'd just rather not risk it.
Thanks!
Dan
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