Fail Of The Week: Solid State Relay Fails Spectacularly

A lot of times these days, it seems like we hackers are a little like kids in a candy store. With so many cool devices available for pennies at the click of a mouse, it’s temptingly easy to order first and ask questions about quality later. Most of the time that works out just fine, with the main risk of sourcing a dodgy component being a ruined afternoon of hacking when a part fails. The stakes are much higher when you’re connecting your project to the house mains, though, as [Mattias Wandel] recently learned when the solid-state relay controlling his water heater failed, with nearly tragic results. With aplomb that defies the fact that he just discovered that he nearly burned his house down, [Mattias] tours the scene of the crime and delivers a postmortem of the victim, a Fotek SSR-25DA. It appears that he mounted it well and gave it a decent heatsink, but the thing immolated itself just the same. The only remnant of the relay’s PCB left intact was the triac mounted to the rear plate. [Mattias] suspects the PCB traces heated up when he returned from vacation and the water heater it was controlling came on; with a tank full of cold water, both elements were needed and enough cu...

Ethereum 2.0’s Phase Zero Scheduled to Launch on January 3, 2020: Devs coin-btc coin-eth coin-ltc coin-xrp coin-eos

Ethereum’s first stage of transition from a PoW to a PoS consensus is planned to take place on Bitcoin’s 11th genesis block anniversary. Ethereum’s 2.0 phase zero is planned for launch on January 3, 2020 according to a recent developers call The first stage of the Ethereum network’s transition to Ethereum 2.0 is expected to take place on January 3, 2020, as said in a bi-weekly call of Ethereum core developers on June 13. During the call, Ethereum researcher Justin Drake said that the dev team is working on code specifications for phase zero, confirming that codes are still expected to be released on June 30. Phase zero is the name of the first transition stage of the Ethereum network from a proof-of-work to a proof-of-stake consensus algorithm, which would pass block validation function from miners to special network validators. As mentioned by Drake in the recent call, phase zero is expected launch on Jan. 3, the day when the first block of the Bitcoin blockchain was created ten years ago. The researcher stated: “We still have quite a bit of time before the end of 2019, so I think looking at a target genesis date towards the end of 2019 could be realistic.” Drake also consider...