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Fuel cell buses from Toyota

23.10.2016

Toyota Motor Corporation has announced plans to commercialize buses powered by hydrogen fuel cells.

Recall that back in December 2014, Toyota began selling the production Mirai car with a fuel cell engine. The sedan is endowed with a TFCS (Toyota Fuel Cell System) power plant with a maximum output of 114 kW. The power reserve exceeds 500 kilometers; express filling of a cylinder with hydrogen takes about 5 minutes.
Toyota is now reported to start selling hydrogen-powered FC Bus buses in early 2017. These vehicles are designed to carry 77 people, including the driver. The interior configuration includes 26 seats and 50 standing places.

Hydrogen is stored in ten tanks at a pressure of 700 bar; the total volume is 600 liters. Two electric motors provide a total of 308 horsepower and 670 Nm of torque. The bus can act as an electric generator for powering external devices.

Up to 2020 hydrogen fuel cell buses are expected to operate in the Tokyo area by XNUMX.

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New logarithmic amplifier from TI 12.05.2007

Texas Instruments has introduced a new precision high-speed (1µs transient) logarithmic amplifier that produces an output voltage or current as the natural or decimal logarithm of the input voltage or current.

LOG114 has a dynamic range of 8 decades and implements the logarithm function without the use of external components. The LOG114 is specifically designed to amplify the photodiode output of fiber optic cables in communication systems. The LOG114 can also be used to measure absorbance in medical and industrial applications, and to match its input dynamic range to that of an ADC.

The QFN-16 package allows the amplifier to be used in compact plug-in modules and multi-channel systems. High speed and wide dynamic range (27 bit equivalent; 100 pA to 10 mA input) with high accuracy make the LOG114 suitable for laser control applications.

The amplifier has a built-in 2,5 V reference voltage source and two independent operational amplifiers, which allows you to organize offset, amplitude scaling, threshold detection, and some other functions. The LOG114 operates on a single +5V or dual +5V power supply over a temperature range of -5 to 75°C.

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