DS

This is a simple project of Mains Slave Switcher II Circuit Diagram . As a guide, a one-inch reed switch with 40 turns reliably switched on with the current flowing through a 150-watt lamp (approx. 625 mA) but larger reeds may require more turns. If the master appliance draws less current (which is unlikely with power tools) more turns will be required. The reed switch is used to switch on transistor T1 which in turn switches the relay RE1 and powers the slave appliance. Since reed switches have a low mechanical inertia, they have little difficulty in following the fluctuations of the magnetic field due to the alternating current in the coil and this means that they will switch on and off at 100 Hz. Mains Slave Switcher II Circuit Diagram: Mains Slave Switcher II Circuit Diagram C3 is therefore fitted to slow down the transistor response and keep the relay energised during the mains zero crossings when the current drawn by the appliance falls to zero and the reed switch opens. C1 drops...

Well, hopefully, you aren’t tired of hearing about the Galaxy Note II yet; Samsung has finally made their announcement and released the official details. The leak earlier this morning pretty much had it nailed, but let’s go through the list now that it’s official. Naturally, the screen is the highlight here. It’s an enormous 5.5-inch HD Super AMOLED display at 1280×720. Early hands-on are showing that, while it is perhaps not quite up to the caliber of the HTC One X screen, it is a vast improvement over the Pentile displays we were seeing previously. The other signature feature is the S pen. The handwriting experience in general and that has been upgraded, as well. The pen itself is a bit larger, making it easier to handle, and the digitizer in the Note II supports 1,024 levels of pressure sensitivity–4x that of the original. Powering the Note II is a 1.6 GHz quad-core Exynos processor with 2 GB of RAM. I can’t imagine that won’t be sufficient to keep things humming along. The battery ...

Well, it happens. You have a lovely finish on your guitar and then you drop it, chip it, scratch it, or whatever. In my case I got a bit overly energetic while polishing it and this happened: It probably didn’t help that the lacquer hadn’t completely cured so was still a little bit soft. I’m sure there’s a term for this, but I can’t for the life of me remember what it is. The long and sort of it is that I friction burned it, causing the lacquer to melt and shift. First things first, I decide to scrape off the raised lacquer with one of my favourite new tools, the razor blade: This leaves us with the following: Next, I carefully sand away any remaining effects left by the original melting using 400 grit paper wrapped around a wine bottle cork: This leaves us with this (you know that expression about things getting worse before they get better?) Next, we go over it with 600 grit paper, again wrapped around a cork (800 grit would be better if you can get your hands on some): Leaving us wi...