Hi All
Would like to power 2 110 volt dc coil 30A relays (T9AS1D12-110) with line voltage separately from my microprocessor power supply in an enclosed device. They draw 9 mA each.
I bread boarded a circuit with a bridge rectifier (MDB10SFSCT-ND), then an electrolytic smoothing capacitor of 1uF 200 volt across the dc output of the bridge. Also placed current limiting resistors of 4.7K each to the coils.
I know better to put my scope on any part of this, but I can measure the correct dc volts to the coils.
Believe it or not it works. The coils of the relays promptly pull in and hold but after a few hours start to heat. Not terribly though and nothing else gets hot.
Could there be anything wrong with this method of running these relays on a circuit configured like this in the long range? Is there anything else I should ad?
Thanks in advance for any opinions you guys could offer.
Would like to power 2 110 volt dc coil 30A relays (T9AS1D12-110) with line voltage separately from my microprocessor power supply in an enclosed device. They draw 9 mA each.
I bread boarded a circuit with a bridge rectifier (MDB10SFSCT-ND), then an electrolytic smoothing capacitor of 1uF 200 volt across the dc output of the bridge. Also placed current limiting resistors of 4.7K each to the coils.
I know better to put my scope on any part of this, but I can measure the correct dc volts to the coils.
Believe it or not it works. The coils of the relays promptly pull in and hold but after a few hours start to heat. Not terribly though and nothing else gets hot.
Could there be anything wrong with this method of running these relays on a circuit configured like this in the long range? Is there anything else I should ad?
Thanks in advance for any opinions you guys could offer.