I think this diagram is now stable enough to put on the record. Both this diagram and the Go code for the policy logic are generated from this pseudocode: render.state(“DaemonUp”, “Daemon running”) render.action(“DaemonUp”, “ChargeWait”, CHARGING) render.state(“ChargeWait”, “Charge wait”) render.action(“ChargeWait”, “MainsUp”, CHARGED) render.action(“ChargeWait”, “OnBattery”, MAINSDROP) render.state(“MainsUp”, “On mains power”) render.action(“DaemonUp”, “OnBattery”, MAINSOFF) render.state(“OnBattery”, “On battery power”)… Continue reading The UPSide state diagram
The build-a-better-UPS project is progressing nicely. About a week ago we had first hardware lightup; I successfully threw messages over an I2C bus to the 20×4 LCD we plan to use as a status display. Hey, it’s not the power plane (yet) but it’s something.
Much has changed in UPSide over the last week. Ground has been broken on the software; one key piece of the control daemon, the policy state machine, now exists.
The design of UPSide is coming together very nicely. We don’t have a full parts list yet, but we do have a functional diagram of the high-power subsystem most of which can be expanded into a schematic in a pretty straightforward way. If you want to see what we have, clone the repo, cd to… Continue reading UPSide needs a battery technologist
Somebody using the handle JeffyPoooh (yes, ‘ooo’) left a comment on The Register that is an only slightly exaggerated summary of the reasons for UPSide:
The current state of play is: We have a high-level system design and a map of the behavior states. We have a capacity target (300W for 15 mins) and a peak-continuous-load spec (400W) We know we’re going to build a double-conversion design and we’re considering a couple of alternative topologies. We pretty much know the… Continue reading How to get started on the UPSide project
The UPSide project, announced here two weeks ago, has come together with amazing speed. We now have: * A hardware lead – A&D regular Eric Baskin – with thirty years of experience as a power and signals engineer. He is so superbly qualified for this gig that my grin when I think about it makes… Continue reading upside wants a firmware dev