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  1. sureshot

    Smart phone charging.

    Looking for some advice on SLA batterys used for charging. What i am looking to build is a portable smart phone charger with long life between charging the SLA. So its a 12 volt SLA 7.5 Ah dropped down with a linear voltage regulator. My question is can an SLA battery be discharged between...
  2. sureshot

    Panel meters.

    Hello. I have a problem using panel meters, i plan on using an amp meter 0-3 amps full scale deflection, internal resistance is 20m ohms, the volt meter is 0-15 volts and the internal resistance is 15k, can anyone tell me if the meters need shunt and multiplier ? or is the internal resistance ok...
  3. sureshot

    Old pc power supply alternatives.

    Hello to you all, my first question. What i am trying to find an answer to is if i convert an old pc power supply can i use an alternative apart from the suggested 10 watt 10R or 5R load resistor, is it possible to trick the supply into believing its got a load on the output, i know the above...
  4. sureshot

    Hi from a newbie

    Hello to the community from the UK nice looking site. Looking forward to reading your topics and projects what ever they might be. :)
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