DPReview.com is closing April 10th - Find out more

To build a high speed photography project using Bluetooth

Started Apr 26, 2018 | Questions
Sunnyback New Member • Posts: 2
To build a high speed photography project using Bluetooth

Hi family,

I'm a newbie and I've set up a programme using an Arduino Nano to build a high speed photography project using Bluetooth (from a guy called ZHUT on youtube).

I've used his schematic and his App and it's almost there, but the LM7805CV regulator (this one: http://www.kynix.com/Detail/800064/LM7805CV.html ) is heating up fast (almost too hot to touch) after a few minutes( with a heatsink). I'm using a 9 volt dc adaptor, power coming out is 5 volts. The trigger threshold numbers (1023) don't come up on the app. to start the programme running, stays at zero. I've never used a schematic before, so I think I've wired up something wrong to cause this.

Any suggestions would be really welcome, as I've spent a long time on this and I'd love to get it going.

I'll send photos, hope they will help, thanks.

ANSWER:
This question has not been answered yet.
boblug Forum Member • Posts: 58
Re: To build a high speed photography project using Bluetooth

With no load the regulator should be cool. Disconnect the output from it and check the voltage, in fact check the voltage into it too from the 9V supply.

Not sure about the other stuff without seeing code but the reality is nothing should be consuming load except the blutooth chip which is only when sending data.

I suggest to check everything put together one section, test it then continue. Heating up like that is odd without any load.

OP Sunnyback New Member • Posts: 2
Re: To build a high speed photography project using Bluetooth

boblug wrote:

With no load the regulator should be cool. Disconnect the output from it and check the voltage, in fact check the voltage into it too from the 9V supply.

Not sure about the other stuff without seeing code but the reality is nothing should be consuming load except the blutooth chip which is only when sending data.

I suggest to check everything put together one section, test it then continue. Heating up like that is odd without any load.

Hi boblug, bolted my heatsink to the regulator after cleaning the surfaces, plugged in my 9 volt adapter and after 10 minutes it was just warm even with the LED lamp burning----Heat problem solved!! 

boblug Forum Member • Posts: 58
Re: To build a high speed photography project using Bluetooth

ok that's good. Shouldn't really need a heatsink especially when sitting doing nothing.

Anyway good job.

Piranha215
Piranha215 Forum Member • Posts: 70
Re: To build a high speed photography project using Bluetooth

If you have never followed a schematic before, then I would suggest that this circuit is way too ambitious for a first project. I am an electrical engineer and am simply stating my opinion.

 Piranha215's gear list:Piranha215's gear list
Sony a6000 Sigma 70-300mm F4-5.6 APO DG Macro
drynn Senior Member • Posts: 1,130
Re: To build a high speed photography project using Bluetooth
1

I am not clear why a voltage regulator is being used here as I was under the impression that the Arduino is not expecting a regulated 5V on Vin. If a regulated 5V is to be used it should be via the 5V pin, which appears to be unused here.

The Arduino has its own inbuilt regulator and expects to see 7V - 20 12V (edit) on Vin. Am I missing something (quite possible)?

Keyboard shortcuts:
FForum MMy threads