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  1. J

    [SOLVED] Selection of Bypass(decoupling) capacitor for high spike currents,voltage drop probem

    I am using 3.6v cell 19Ah (EVE - ER34615) to power the SIM900D module. The problem is I need help in the selection of proper bypass capacitor. According to battery's datasheet, it can provide max continuous current of 400mA and maximum continuous current of 230mA while SIM900D requires the...
  2. J

    Transistor Switching Circuit for GPS Device

    Hello everyone! I want to turn on/off my GPS(SKM53) using transistor based circuit as it consumes too much current 45mAh so i want to save my battery. I need help in solving this problem keeping in mind the following limitations : 1. My battery voltage is 3.4v 2. GPS current requirement is...
  3. J

    Automatic AC Bulb Fuse Detection Circuit

    Hello ! I have an AC bulb operating at 220v 50Hz , i want a circuit that determines automatically either the bulb is fused or not. I need 5v and 0v logic for this purpose as i need this feedback for the micro-controller. I have considered several solutions for this purpose : 1. When the bulb...
  4. J

    Loading Effect In Modified Sine Wave Inverter

    Hello guys ! I simulated a modified sin wave inverter in Proteus, the out is perfect 220v but when i attach a load it voltage drops to 1v. I dnt know why is loading effect happening in transformer. Kindly check the schematics and give me some solution to solve this problem : These are the...
  5. J

    Amplifier Circuit For Speakers

    I have speakers Edifier R100. Here are the specifications : https://www.edifier.com/eng2005/product/s0015_01.htm I am not satisfied with its performance, the base got too noise when i increase the volume. I want to modify them using any high power amplifier. As Input Impedance: 10K Ohms , can...
  6. J

    LM3080N IC In Proteus And Multisim

    Hello guys ! I could not find the LM3080N IC in Proteus and Multisim, i need to simulate am modulation , can someone provide me the model ?

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