I just installed a UPS the other day (an older Back-UPS XS1300, pictured) and noticed on the back it’s an “approximate sine wave” output. After reading the bottom closer, it’s specified that the device, under 25% load, has a THD of 55% and a maximum harmonic amplitude of 43% of the fundamental’s amplitude. Sounds pretty bad, but what does that really look like? Continue reading
I’ve amassed a lot of loose surface mount parts and it finally came time to do something about organizing them – digging through piles of little plastic bags in a box gets real old real fast. I considered buying something like Adafruit’s SMD parts kit and just stuffing my extra parts in the corresponding slots, but I don’t currently have a pressing need for all the parts, and I came up with something a little cheaper. Perhaps more interesting, I’ve got a nice recipe for heat sealing plastic (like anti-static bags) with your soldering iron without messing it up. Continue reading
You probably don’t even care about any of this. If that’s true, ignore it. Testing results for http://www.jailbreakme.com/:
3G/4.0 – Untested, jailbroken with Pwnage Tool
3G/4.0.1 (UPDATED from above) – Failure, Safari crash to SpringBoard. Reboot spawns reboot loop.
Entered DFU mode to restore to fresh stock 4.0.1.
3G/4.0.1 (stock restored) – Great success! High five!
3GS/4.0.1 (fresh restore) – Great success! High five!
Haven’t tried yet, waiting for MMS/FaceTime fix (since I actually use this phone) Great success! High five! And MMS/FaceTime both work now too.
3G/3gS also unlocked with Ultrasn0w, 4 not yet (and I have no sim to test with anyway).
There have been a couple other posts involving literally hundreds of comments, so here’s a new one. The theme is simple. If you have off topic questions, ask them here!
Here’s a quick tip I picked up via the Stanford CS193P iPhone Programming (coral) course. Normally, to switch between device and simulator debugging requires going to the Project > Set Active SDK menu. Since I switch between said active SDKs almost every other build at points, the whole menu thing gets annoying. Luckily, it’s easy to put this drop-down menu in your toolbar in Xcode. Continue reading