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"BlueJava": Silvia + Arduino mod
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jonr
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Joined: 25 Jun 2013
Posts: 295
Location: Americas
Expertise: I like coffee
Posted Sat May 3, 2014, 12:52pm
Subject: Re: "BlueJava": Silvia + Arduino mod
 

I haven't noticed any noise issues - I suspect that the inductance of the solenoid pump is enough of a filter.   The turn on pulse of a triac (non zero crossing) also creates noise - at lower frequencies that are harder to filter out.
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JGG
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JGG
Joined: 31 Mar 2006
Posts: 1,377
Location: Kentucky, US
Expertise: I like coffee

Espresso: PID Silvia; PID Alexia
Grinder: Mazzer SJ
Roaster: Hottop D w/HTC+TC4C
Posted Mon May 5, 2014, 5:20am
Subject: Re: "BlueJava": Silvia + Arduino mod
 

jonr Said:

I haven't noticed any noise issues - I suspect that the inductance of the solenoid pump is enough of a filter.   The turn on pulse of a triac (non zero crossing) also creates noise - at lower frequencies that are harder to filter out.

Posted May 3, 2014 link

Yes, the lamp dimmers and router speed controllers, etc., that use phase angle control would create a similar condition, but at 50 or 60Hz primary frequency.  It is good to know that the higher frequency PWM has not created a noise problem for you.

Where can I get information in the form of schematics and/or components?  I would like to try this at some point.

Jim
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jonr
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Joined: 25 Jun 2013
Posts: 295
Location: Americas
Expertise: I like coffee
Posted Mon May 5, 2014, 3:46pm
Subject: Re: "BlueJava": Silvia + Arduino mod
 

The topic on my build is here..  Basically temperature and flow profiling (using a scale).  I'm quite happy with it (ie, great espresso), although there may be more convenient ways to measure flow.
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buestad
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Joined: 22 Nov 2013
Posts: 13
Location: Norway
Expertise: I love coffee

Espresso: Rancilio Silva
Grinder: Rancilio Rocky
Posted Sat May 10, 2014, 3:45pm
Subject: Re: "BlueJava": Silvia + Arduino mod
 

Saturday night, the wife is out and I watch the kids, and have the night to myself geeking out on my project.

I have got some new small resistors which I have soldered some of to the prototype board.
I also got some LED bargraphs which is now fitted into an original boiler light housing.

buestad: IMAG0597 (1).jpg
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buestad
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Joined: 22 Nov 2013
Posts: 13
Location: Norway
Expertise: I love coffee

Espresso: Rancilio Silva
Grinder: Rancilio Rocky
Posted Sat May 10, 2014, 3:46pm
Subject: Re: "BlueJava": Silvia + Arduino mod
 

...the board...

buestad: IMAG0595 (1).jpg
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buestad
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Joined: 22 Nov 2013
Posts: 13
Location: Norway
Expertise: I love coffee

Espresso: Rancilio Silva
Grinder: Rancilio Rocky
Posted Sat May 10, 2014, 3:46pm
Subject: Re: "BlueJava": Silvia + Arduino mod
 

...and the light...

buestad: IMAG0598.000.jpg
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