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  1. smartsarath2003

    Design of PC Speaker

    Hello, I want to design a simple PC speaker, probably less than 5W. The only building blocks I have in mind is a basic pre-amplifier with op-amp and a ClassAB power amplifier that will drive a 8ohm,6W speaker. But My problem is where should I have the volume control. Is it during the...
  2. smartsarath2003

    Temp. Compensation for linear power supply

    Hello, I built a small power supply with LM338 regulator. The problem I am facing is the output voltage going down slowly when i leave the load ON. Is this happening because of temp. I connected a load of 220R at 24V output, so it not too much current actually. Does anyone have anyidea why is...
  3. smartsarath2003

    Help with simple RF switching application

    Hai, I need some help regarding wireless switching application. I want to control a lamp from my PC using RF link. I have a block diagramatic idea regarding this. PCserial port -->RF transmitter --->RF receiver --> Control Ckt But the problem is all these bulinding blocks are very new...
  4. smartsarath2003

    AAA Battery Charger

    Hai, I want to make a small AAA battery charger. I have an idea about a const current charger using LM317. So far I decided to use a LM317 and a 555 timer . Could any one please let me know any ideas without using microcontrollers. ::) Thanks
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