current low

Vetta VL110A WL Altimeter SmartLite Wireless Cycling Computer
$160.00
I bought this computer to replace an older, wired version of the same computer (VT100A). Setting up the head unit to work with the wireless torpedo sensor unit was a piece of cake. The head asks you for a synch device and you push a button on the torpedo. Done. It is that easy. The torpedo zip ties to the chain stay and easily adjusts to pick up both pedal and wheel magnets. I have other wireless bike computers, and this is the slickest setup I have used. I love it.

When working, I also love the head unit. The layout and grouping of the functions is logical and easy to remember once you get used to it. Since I ride in the mountains, I am very interested in my altitude and this computer remembers the altitude of 2 reference points that you can use to baseline the rest of your ride. My most used functions are total distance, average speed, ride time, cadence, and altitude.

I have used this computer for about 100 hours of riding, or about 1,000 miles of distance, so I have a pretty good idea of how it performs over the longer term. Over this time, it has operated correctly on only about 60% of my rides!! The head unit either resets in the middle of a ride or goes into some sort of crash mode where all segments of the display are illuminated. I have replaced the battery twice during this period and this doesn't seem to help. I can't depend on it working any more so I am shopping for a replacement.

Summary: If the computer were more reliable, it would be a fantastic setup. It packs a lot of functionality into a light weight and simple device. I wish I could count on it. Customer support is sufficient, but not willing to bend over backwards to replace the unit.

Three-Phase Diode Rectifiers with Low Harmonics: Current Injection Methods (Power Electronics and Power Systems)
$99.00
In this book, principles of the current injection are discussed first. This discussion is followed by an analysis of various magnetic current injection devices. The third harmonic current injection is discussed next, and several current injection networks are analyzed. The optimal current injection is the topic that follows, and the requirements imposed to the current injection network in order to provide the optimal current injection are derived. Several current injection networks that provide the optimal current injection are proposed, and some parasitic effects are discussed. Recovery of the power taken by the current injection networks is analyzed, and two types of passive resistance emulators are analyzed in detail, the current-loaded resistance emulator, and the voltage-loaded resistance emulator. Avoiding the inductor of the current injection network results in mutipulse operation of the current injection based rectifiers with passive resistance emulators, which is discussed next. In a separate chapter, a different current injection device based on three bi-directional semiconductor switches is presented, and previously derived results are generalized for this special type of current injection device. At last, the results are generalized to three-phase full-bridge thyristor rectifiers. Essentially, the book presents digested results of numerous research papers published in the last fifteen years in the area of current injection based rectifiers. The book may be of interest for the people involved in design of low-harmonic three-phase rectifiers, and the people involved in research in this area.

Electronic Specialties (ESI695) Low Current Probe
$135.99
Features and Benefits: Small jaw opening of 3/8 inches or 9 mm is convenient for tight spaces Low battery indication? Used to generate current waveforms for diagnostic analysis Compatible with many lab scopes and graphing multimetersThis is compatible with many lab scopes and graphing multimeters.? It's used to generate current waveforms for diagnostic analysis.? Also, it works great with digital multimeters.? It's handy and easy to use.?

Low Current Probe
$145.00
Easy way to measure current with a LabJack (and thus with a computer). Tested with the UE9, but should work with any LabJack data acquisition device.

Item received was actually the ESI-695: http://www.esitest.com/695.html