Automation · Espresso · Espresso, BZ13 · Gravimetric · Hack · pre-infusion · pressure profiling · pressure-profile · soft-infusion · Technique · Zhng

Espresso Pressure control hack

Continuing from the previous post on flow-rate hack and gravimetric espresso project, I have been able to control the pre-extraction flow-rate, extraction flow-rate and extraction pressure of the espresso using a low-cost hack. Disclaimer: I am not liable for any damage, death or injury caused through the use of this hack. The AC voltage controller… Continue reading Espresso Pressure control hack

Espresso · Hack · pre-infusion · pressure-profile · soft-infusion · Technique · Zhng

Espresso flow-rate control hack

In a previous post on the gravimetric espresso project, I gave a sneakpeek of the pressure controller (AC voltage controller) which is hooked up to the Ulka vibration pump. The AC voltage controller is commonly sold as ‘AC 0-220V 20A Pulse Width Modulator PWM Electric Motor Speed Controller’, and I’m going to demonstrate what is… Continue reading Espresso flow-rate control hack