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  1. J

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

    Thank you FvM for replying. What if i connect two 2200uF capacitor across GSM or one 2200uF cap and one 1000uF cap ? What about low ESR capacitor ?
  2. 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...
  3. 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...
  4. J

    Automatic AC Bulb Fuse Detection Circuit

    Can you provide me the schematics for this purpose. - - - Updated - - - i think load current detection will be more accurate and simpler solution in my case. here is one circuit i found : https://www.learningelectronics.net/circuits/mains-indicator_04.html check this circuit guys and guide me...
  5. J

    Automatic AC Bulb Fuse Detection Circuit

    Thank you for replying. Yes well transformer and hall effect sensor can be used but transformer is bulky device and more over there are 8 bulbs and i want to know to status of each bulb separately n this means if i use transformer or hall effect sensor then i need 8 transformers/sensors for this...
  6. 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...
  7. J

    Loading Effect In Modified Sine Wave Inverter

    Thanks for your reply sir ! i configure my transformer by the setting the values shown in figure. Its set that when i apply Ac 220v on primary it produces 10-0-10 on secondary.
  8. 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...
  9. J

    500w pure sine wave inverter circuit diagram

    can someone tell me which software will be used to open the pcb layouts in this inverter ! https://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en543188&redirects=offlineups
  10. 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...
  11. 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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