CrazyEngineers Forum - Electrical & Electronics Engineering |
- Need Help in repairing mic of My Nokia Headset
- desiging a series pass voltage regulator
- Ebook for 8085 and 8086 up
| Need Help in repairing mic of My Nokia Headset Posted: 03 Oct 2010 11:30 PM PDT Hi guys, I am a computer engg student, so I have very little knowledge about this field. Few days before my nokia headset wh-102 hs-125 mic stop working. Now button on it also not working.:(:(:( Speakers are working fine. I have a simple multimeter, but don't know how to check the wire problem of headset. I want to clear that it is wire problem or mic problem. I searched fir it on net but not got any good helping article. So can any one help me. As I use my headset for phone calls, so I need it to repair it as soon as possible. |
| desiging a series pass voltage regulator Posted: 03 Oct 2010 07:55 PM PDT hey can anyone please tell me how to design a series pass voltage regulator??? these are the specifications given: Design and construct a 9 V ± 0.3 V, 1 A, series pass voltage regulator from discrete electronic components. The regulator must exhibit a voltage regulation of 5% or better and must be fed by a dc input voltage from a laboratory power supply. In addition, the regulator must incorporate temperature and over current sensing circuits which would disconnect the load from the regulator, for temperatures and currents exceeding 40 degrees centigrade and 1 A respectively. The output regulator voltage and current, together with the temperature of the series pass transistor must be converted to digital format using A/D converters and displayed on the Spartan 111 FPGA Development Board when selected. The following specifications must be met for the display of the variables. 1. The units of all variables are to be displayed along with the respective reading. 2. The voltage is to be displayed to 1 decimal point. 3. The current is to be displayed to 2 decimal points. 4. The temperature is to be displayed as a whole number. 5. The display of the readings for voltage, current and temperature are to automatically appear in a cyclic manner, with each reading being displayed for 5 seconds. 6. All leading zeros are to be suppressed. thanxxx in advance!!! :) |
| Posted: 03 Oct 2010 10:06 AM PDT hey anybody having ebook for 8085 and 8086 microprocessor.Please help |
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