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03/04/2021 9:04 PM
I have been trying Scott Rao Hario V60 pourover this week. 1:17 and blooming with 2 parts water the first 45 seconds then splitting the rest into 2 pours. A little stirring is included. We like it.

03/04/2021 11:35 AM
My brew ratio is 1:17 (exactly 59.5 g/L). That's roughly 8.5g per 5-oz cup.

02/27/2021 9:29 AM
I'm looking to hire someone to teach/help me to find the best roast profile for the 3 types of coffee that grow on my farm in nicaragua. I live in LA, but but could go anywhere in so cal with my Behmor for a roasting lesson. Please contact me if you're in

02/17/2021 7:20 PM
When your wife thinks 30 grams for a 6 cup setting is strong, you learn to drink muddy water when you are making coffee for both of you.

02/17/2021 8:32 AM
I use a rule of thumb of 60 grams per liter. 8 cups (1 liter, 32 oz) = 60 grams, 6 cups (3/4 liter, 24 oz) = 45 grams. 10 cups = 75 grams 12 cups = 90 grams

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Ametek Motor -Speed Control / Arduino Control???
renatoa
You make me curious to test if a generic vacuum blower can or not be controlled by a $12 SCR voltage regulator, from Amazon/eBay/China.
Seems so... as you can see from the video I did:

madhatter349

Quote

renatoa wrote:

You make me curious to test if a generic vacuum blower can or not be controlled by a $12 SCR voltage regulator, from Amazon/eBay/China.
Seems so... as you can see from the video I did:



the SCR's I tried had limited scope, with my arduino I am able to run the motor at 6% speed.
renatoa
At 12 my motor stopped. 12... on display, they are unknown units, they surely aren't percents or volts.
For me is enough control range, ymmv.
madhatter349

Quote

renatoa wrote:

At 12 my motor stopped. 12... on display, they are unknown units, they surely aren't percents or volts.
For me is enough control range, ymmv.


I have a feeling these units are hit or miss. I was using one well until I somehow blew some component. My ideal was figuring out how to accurately control the motor with arduino which I did.
koffeegrounds
Get a 25 amp SSR and a DSPR1 From Auber electronics, don't forget the heat sink. This is what i use on my commercial roasters.
renatoa
No need for a heatsink for the motor.
I run 1300 W heaters (6 Amps 230 V) on 25Amp ssr without any heatsink, and it is barely warm, surely under the 60 C skin touch test limit.
Current is what matters for SSR heat dissipation, not power of the heater.
For 110V current is double, could be different a different case, current being double for same power, the heat could be 20-30C degrees more.

Beware to cheap Fotek fake labelled SSRs, the 25 Amps labelled units were found inside fitted with 16 or even 12 Amps triacs. The 40 Amps units with 25 Amps triac. They aren't bad for the price, but you should use them at half of rated current to be safe.
madhatter349

Quote

koffeegrounds wrote:

Get a 25 amp SSR and a DSPR1 From Auber electronics, don't forget the heat sink. This is what i use on my commercial roasters.


I got a 40 amp SSR from Newark, which I presume should be reputable and reliable
https://www.newark.com/multicomp/mc002318/solid-state-relay-40a-4-32vdc/dp/48AC9134
madhatter349

Quote

renatoa wrote:

No need for a heatsink for the motor.
I run 1300 W heaters (6 Amps 230 V) on 25Amp ssr without any heatsink, and it is barely warm, surely under the 60 C skin touch test limit.
Current is what matters for SSR heat dissipation, not power of the heater.
For 110V current is double, could be different a different case, current being double for same power, the heat could be 20-30C degrees more.

Beware to cheap Fotek fake labelled SSRs, the 25 Amps labelled units were found inside fitted with 16 or even 12 Amps triacs. The 40 Amps units with 25 Amps triac. They aren't bad for the price, but you should use them at half of rated current to be safe.


Ya its crazy the Foteks may be fake, I avoided the fotek as well because I couldn't find a random fire SSR from them.....

I bought this https://www.newark.com/multicomp/mc002318/solid-state-relay-40a-4-32vdc/dp/48AC9134
renatoa
All Foteks I used so far are random fire, I don't know any ZC model labelled Fotek.
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