LED is the abbreviation of Light Emitting Diode, which uses solid semiconductor chips as light materials. When adding forward voltage to its two ends, carriers in semiconductors will campsite and release extra energy, which can cause photon emission and generate visible light. The advantage of LED including: efficient and energy-saving, long service lifetime, health light, green environmental protection and so on.(more)
Thermoelectric cooler (TEC), which was first found by Peltier in 1834, is a semiconductor material as the foundation, and it can be used as electronic components of a small heat pump. Through loading a low DC voltage on both ends of the TEC, the heat will move from one side of the element to the other. At this time, the temperature of one side of TEC will be reduced, and the other side temperature will rise. It is worth noting that, as long as the direction of the current is changed, the direction of heat flowcan be changed and the heat will be conveyed to the other end. So TEC can realize two functions of refrigerating and heating at the same time. In addition, TEC can also be used to control temperature precisely.(more)
Power Supply can convert another form power into electrical energy. The generators convert mechanical energy into electrical energy, dry cell convert chemical energy into electrical energy. The battery itself has no electricity. There are positive and negative charges on its two poles. They will provide voltage; electrical conductor has voltage in itself. When we add voltage, it will produce electricity. When the battery’s two poles connect with conductor, it releases charge so that generate electricity. Dry cell also called power supply, there is equipment called eliminator supply convert alternating current into direct current through transformer and rectifier. There is equipment called signal source provide signal. Triode transistor amplification signal which is send before, then we sent signal which it be amplification to circuit in return. We regard triode transistor as signal source to circuit in back. Rectified current, signal source sometimes also called power supply.(more)
The Thermoelectric Cooler is also called Semiconductor refrigeration module, Peltier, etc. . Because of there are two sides, one side absorbs heat, and the other side dissipates heat. Its effect is heat conduction. It does not produce heat by itself. So it is called Refrigeration piece or thermoelectric cooler module.(more)
But some usual semiconductor often is made up of Copper, aluminum or other metallic conductor and two pieces ceramic chip like sandwich biscuit to press something from both sides. The ceramic chip must be heat and conduction well. See the following the picture.(more)
NTC is the abbreviation of Negative Temperature Coefficient, which refers to semiconductor materials or electronic components. A glass encapsulated thermistor is a kind of NTC thermistors, which has the function of temperature compensation. And its main characteristics are high temperature resistance and humidity resistance.(more)
LED energy-saving lamp uses white light emitting diode with high brightness as a light source, which is a new generation of solid cold light source. It has many advantages such as high luminous efficiency, less power consumption, long service life and safety and environmental protection. Comparing with tube energy-saving lamps, LED lamps have high brightness, good light performance, wide voltage range and some other characteristics. Through the microcomputer controller, seven color changes of LED can be achieved. Comparing to incandescent or fluorescent lamp with low voltage, LED has obvious advantage in the respects of stability and long service life. The continuous work time of incandescent lamps is rarely more than 1000 hours; using electronic driver, the continuous work time of fluorescent lamps can be up to 8000 hours; LED trouble-free work time can reach 50000 hours.(more)
Thermalsilicone pad is a heat transfer mediumto reduce thermal contact resistance between the heat source surface and contact surface of radiator parts. In the industry, it is also called the thermal silica films, thermal conductive silicone pads, soft cooling pads and so on. As the electronic equipment continually makes more and more powerful function integrate into smaller and smaller components, the temperature increasing will lead to equipment running slowly, device fault, confined space and many other performance problems. So the temperature control has become one of the critical design challenges, that is, in the situationof framework of austerity and smaller and smaller operation space, how to effectively take away more heat produced by larger and larger unitpower.(more)
LED is the abbreviation of light emitting diode. LED is being widely used with the development of economy and technology. In this paper, I will introduce the application of LED in the aspect of indicator light in the circuits.(more)
