Jul 08 2010

Electronic devices without battery-driven approach

Technology double layer capacitor, the latest development has replaced the specific applications of secondary energy storage in rechargeable batteries (footnote 1). Capacitor provides a rechargeable battery compared to the obvious benefits, including the actual number of infinite cycles of charge / discharge, sustainability of short-circuit case, just a simple circuit overvoltage protection. In addition, storage capacitors recharge quickly, and when the product reaches the end of working life, will not cause problems of disposal of toxic waste. dell inspiron 1501 battery dell xps m1210 battery 

The design example of a powerful engine in describing the capacitor charger, and by extension of earlier ideas. Strongly driven generator and a combination of high value capacitor for emergency equipment and survival kits provide a high degree of autonomy and the feeding method of keeping the environment clean. This type of “application of renewable energy” covers a wide range of modern electrical and electronic devices, including mobile phones, MP3 players, AM / FM radio, PDA, laptop, flash. 

High Power Capacitor Charger contains only a few elements: storage capacity, bridge rectifiers, protection against the pressure of high voltage capacitor in limiting the effects of the Zener diode (Figure 1). To experience the real storage, you can use the maximum rated voltage of 5.5 V to 1F, or 0.47 F capacitor, such as NEC Tokin America Inc., (www.nec-tokin.com) products (Figure 2). If you need more storage, you can feed a larger capacity capacitor, such as Elna Corporation of the F 100 Dynacap 2.5V (Figure 3). sony vgp-bps12 battery 

You can put bulbs labor cheap Suppressed Flash, and it is as a charger output capacitor (Figure 4). In addition, the market is artificial supply of products offer the opportunity to experiment. For higher output, you can use a stationary bicycle generator motor. According to the pedal power of individuals of different, these generators can provide 20W to 100W average power. Figure 4 is the crank flash boot style lit the first of a 2.5V, 0.15A incandescent bulbs, full of light when it consumes about 0.4W. However, the measurement results show that: the generator can provide more power, and in about 10 seconds 1F capacitor to charge to 5V. The following formula calculates stored in a capacitor (capacitance value of C) in the energy E = 1/2C × VMAX2 = 12.5J, the formula to calculate the average time of maximum force production of various T Electricity: TMAX = E / T = 12.5/10 = 1.25 W. eee pc 1000he battery  sony vgp-bpl8 battery 

You can use the following formula to calculate voltage across the capacitor becomes the lowest in the highest, while the capacitor discharge cycle to provide energy efficient Eeff: Eeff = 1/2C (VMAX2-VMIN2), representing respectively VMAX2 VMIN2 and applied to the power equipment is the maximum and minimum operating voltage. You can store capacitors in series or in parallel. In both cases, must ensure that the circuit has adequate protection against overvoltages on the capacitor. For additional tension, you can add a DC / DC switching regulator to generate a stable output voltage. HP mini 5101 battery 

Some important design considerations is the bridge rectifier diodes and Zener diodes DZ maximum voltage and current. Start on the type crank generator experimental received the following approximation of the open circuit voltage: 10 Vrms maximum voltage, peak voltage 14 V, maximum short-circuit current 200 Marmi. For this application, one with the lowest peak reverse voltage of 20V and 0.5A minimum current through the bridge rectifier at low cost to provide sufficient margin. Note DZ breakdown voltage should be slightly less than the maximum working voltage storage capacitors, and diodes rated power – in this application is 2 W – expected to exceed the maximum output of generator current and voltage zener diode conduction product.

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