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For those students looking for LED Temperature Thermometer circuit. Visit this link:

http://www.electronics-project-design.com/TemperatureThermometer.html

The theory of operation and parts list is also described on that particular site. For troubleshooting, please visit the electronicslab forum.

Schematic Diagram:

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Alps Electric has developed the industry’s smallest* magnetic sensor, the HGDFPA Series, which will serve as a connector connection for all types of devices. Sample shipments are to commence from February 2009.

As devices become thinner and more compact, non-contact detection mechanisms using magnetic sensors are becoming more common to determine whether the covers of small devices such as mobile phones are open or closed and in position. Thanks to their characteristically long operating lives and high reliability, utilization of magnetic sensors is spreading to lid and door detection applications on home appliances, such as refrigerators, washing machines and dishwashers. Magnetic sensors are also being fitted in amusement devices such as game consoles as well as all types of industrial devices.

Rather than mounting magnetic sensors on circuit boards of the type used in smaller devices, in cases where they are fitted to large devices, such as consumer electronics and industrial devices, there are calls for products in which the mounting is simplified by the use of cable connectors.

The HGDFPA Series is a switching output-type magnetic sensor in which the cable connections can be made by a connector. Dispensing with the need to solder connections onto circuit boards, connector connection enables simpler fitting of the magnetic sensor to all types of devices. Furthermore, the HGDFPA Series makes use of the technologies Alps Electric has cultivated in thin-walled mold processing, high-density mounting technology and simulation engineering techniques to realize a thinner and more compact connector connection-type magnetic sensor 14.0mm wide, 9.0mm deep and 5.0mm high.

Utilizing Alps Electric’s high-precision magnetic sensor in a single package, the HGDFPA Series makes it possible to accurately detect magnetic fields over wider ranges than other magnetic sensors. This allows for greater engineering freedom in set product design.

In addition, the installation of magnetic sensors in set products necessitates checks to ensure that they are correctly positioned as the detection distance changes depending on their direction when installed. Processing the HGDFPA Series to have a chamfered corner on a part of its chassis makes the positioning direction easily identifiable and prevents errors during mounting.

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Maxim Integrated Products (NASDAQ: MXIM) introduces the MAX17108, a high-performance level-shifter solution that enables the implementation of GIP technology in LCD panels. Developed using Maxim’s proprietary, high-voltage BiCMOS process, this device integrates a 10-channel, level-shifting scan driver that can swing from -12V to +38V and swiftly drive capacitive loads; a high-speed operational amplifier to drive the LCD backplane (VCOM); and a linear regulator to provide the internal bias for the step-up controller. Optimized for GIP-based LCD TVs and monitors, the operational amplifier features rail-to-rail outputs, a ±200mA output short-circuit current, a 100V/µs slew rate, and a 20MHz bandwidth.

The MAX17108 is available in a 5mm x 5mm, 28-pin TQFN package and is fully specified over the -40°C to +85°C extended temperature range. Prices start at $2.00 (1000-up, FOB USA).

Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company reported revenue in excess of $2 billion for fiscal 2008. Maxim was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers’ products. To date, it has developed over 5900 products serving the industrial, communications, consumer, and computing markets. For more information, go to www.maxim-ic.com.