Zone out to the longest continuous timelapse made in space | 25 Amp Circuit Breaker

http://www.aliexpress.com/store/product/110v-220v-Silicone-Rubber-Heater-Bed-600MM-x-600MM-24-X24-For-3D-Printer-With-100k/709519_1847472742.html

Some heaters are a coil of Alloy wire cast in ceramic and then enclosed in a stainless steel tube. Basically a bad inductor, but still having the surge properties of one. Same with big boy halogen bulbs.

The Sony A33 uses the image sensor itself when metering, and considers the overall image as 1,200 separate zones in performing metering calculations. Metering modes include Multi-segment, Center-weighted, and Spot, and the metering system can function from -2 EV to +17 EV (at ISO 100 equivalent with an F1.4 lens). An autoexposure lock button is provided, allowing metering to be locked from a specific portion of the subject, then the overall image reframed as desired. +/-2.0 EV of exposure compensation is available, in 1/3 EV steps. The A33 also offers a three-frame exposure bracketing function, which allows a step size of either 1/3 or 2/3 EV between subsequent frames. Shutter speeds from 1/4,000 to 30 seconds are available, as well as a bulb position that holds the shutter open for as long as the shutter release is pressed. Flash X-sync is at 1/160 second. White balance options include auto, six presets (Daylight, Shade, Cloudy, Incandescent, Fluorescent, and Flash), plus both custom and direct color temperature (2,500 to 9,900K) options. The six presets allow +/- 3 step adjustment, and there’s also a color filter setting that provides +/-9 steps of magenta / green compensation.

TJ may also want to mention on his project page that without a choke, the TRIAC will dump out a ton of EMI (that’s why most commercial dimmers have to have a choke in series with the load to be able to get FCC certification).

This causes some headaches for a friend who has to deal with unaware contractors installing 240VAC or 220 VAC devices in condo kitchens what have 208VAC, not 240VAC. Some devices don’t work, some don’t work well.

A coworker at JPL got bit by an ion pump supply. On-site health unit recognized abnormal EKG, sent him to ER. ER doctor diagnosed a congenital abnormality unrelated to the incident. But he ended up with a date with a nurse, so he considered it a worthwhile exercise.

A capacitor stores electricity and is used during the compressor and fan startup for extra power. It also protects the motor from damage due to fluctuating voltage. These capacitors don’t last forever and can go out unexpectedly. If you are comfortable with electrical repairs you can use a screwdriver to discharge the dual start/run capacitor by connecting terminals to short it out, and then replace it with a new one made for the make and model of your A/C. If that’s beyond the level of DIY you’re comfortable tackling, then call a pro.

But if the power supply isn’t made for the 110-120 volt market, then yes, this can be a legit concern.

MOVs are rated for specific ac-line operating voltages. Exceeding these limits by applying a sustained abnormal overvoltage condition could result in overheating and damage to the MOV.

Creepage to the mounting screws is one issue and that fuse crowed by traces at mains potential is just bad design.

Auto High Dynamic Range mode captures numerous images with varied exposure, then creates a single image with much greater dynamic range than would otherwise be possible.

That. Console. Is. Disgusting. Reminds me of my PT Cruiser’s cheapest part: the single piece off-white console.