PID controlled "Open Source ESPRESSO Coffee Machine"

Engineers Gleb Polyakove and Igor Zamlinsky's new project has raised more than 300,000 yuan with the help of the KickStarter platform, far more than 16 times what they expected. Why are their products so popular? An Espresso coffee machine controlled by PID. On the fundraising page, Gleb and Igor point out that there are now two types of household Es on the market