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Manuel83 / craftbeerpi3

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SSR Relay for variable power to kettel #140

Open Nauticno opened 7 years ago

Nauticno commented 7 years ago

It is possible to adjust % of power to the kettel. But what do I need to get this to work? I possible need an special type of SSR relay?

Philusha1983 commented 7 years ago

In my old electric setup I had a potentiometer and ssvr - solid state voltage regulator. Maybe it's possible to make a digital version of it

On 11 Oct 2017 10:04 a.m., "Nauticno" notifications@github.com wrote:

It is possible to adjust % of power to the kettel. But what do I need to get this to work? I possible need an special type of SSR relay?

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/Manuel83/craftbeerpi3/issues/140, or mute the thread https://github.com/notifications/unsubscribe-auth/AHARW1sVpamDqsUtH23XpSn0iyv5cYjnks5srGiBgaJpZM4P1ARK .

lalo-uy commented 7 years ago

No, any SSR wil work with a pwm actuator. Be aware of the current rating of your SSR and the corresponding Heat Sink

2017-10-11 4:15 GMT-03:00 Philip Levin Slesarev notifications@github.com:

In my old electric setup I had a potentiometer and ssvr - solid state voltage regulator. Maybe it's possible to make a digital version of it

On 11 Oct 2017 10:04 a.m., "Nauticno" notifications@github.com wrote:

It is possible to adjust % of power to the kettel. But what do I need to get this to work? I possible need an special type of SSR relay?

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/Manuel83/craftbeerpi3/issues/140, or mute the thread https://github.com/notifications/unsubscribe-auth/ AHARW1sVpamDqsUtH23XpSn0iyv5cYjnks5srGiBgaJpZM4P1ARK .

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/Manuel83/craftbeerpi3/issues/140#issuecomment-335707609, or mute the thread https://github.com/notifications/unsubscribe-auth/AK4bcbu5Xe5eExlen_76bKKxuajvQ1Buks5srGsbgaJpZM4P1ARK .

chrisbrucewilliams commented 6 years ago

I was wondering about the same thing. A PID allows you to do this easy. The above answer is not 100% clear. Does someone have a link to an example of a PWM that would be used to control the heater when the power is changed in the CBP?

bertah commented 6 years ago

See my answer in issue #153. This can be achieved without additionnal hardware, by playing with the duty cycle value of the GPIOPWM actor.

linuxguy123 commented 5 years ago

Caution: some SSRs are not built to be cycled on/off at a high frequency. Remember, the temp sensors in CBPi3 are read every 5 seconds and most kettle heat systems won't raise the temp faster than a few F per minute. A PWM frequency of a second or more may be adequate and work well with most SSRs.