So this is not technically about a power supply but it is about supplying power - I hope i'm posting in the correct forum...
Im working on a project that uses an Arduino, a sensor and a piezo speaker.
The speaker is used as an alarm buzzer and is loudest when i source 24v to it via a MOSFET which is actuated by the micro controller.
Then, I power the Arduino with a 7805 regulator as well as the sensor, then I have a separate 7805 feeding the reference voltage pin for a more stable reference voltage so that i can somewhat guarantee accurate voltage readings from the sensor.
My problem is, if i use a single 24v power supply for the whole project then power the 7805's from that source, the 7805 that supplies the Arduino and the sensor gets REALLY FRIGGIN HOT which I know is caused by the large delta between the 7805's input and output.
My question is ... is there anything I can do to lower the heat output from the regulator? I've got a decent heat sync on it (three times the size of the regulator itself) and the heat sync gets so hot that you can't touch it for more than a second or so ... I'm not OK with my project wasting energy like this.
Thank You for any info you can offer,
Im working on a project that uses an Arduino, a sensor and a piezo speaker.
The speaker is used as an alarm buzzer and is loudest when i source 24v to it via a MOSFET which is actuated by the micro controller.
Then, I power the Arduino with a 7805 regulator as well as the sensor, then I have a separate 7805 feeding the reference voltage pin for a more stable reference voltage so that i can somewhat guarantee accurate voltage readings from the sensor.
My problem is, if i use a single 24v power supply for the whole project then power the 7805's from that source, the 7805 that supplies the Arduino and the sensor gets REALLY FRIGGIN HOT which I know is caused by the large delta between the 7805's input and output.
My question is ... is there anything I can do to lower the heat output from the regulator? I've got a decent heat sync on it (three times the size of the regulator itself) and the heat sync gets so hot that you can't touch it for more than a second or so ... I'm not OK with my project wasting energy like this.
Thank You for any info you can offer,
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