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  1. ramussons

    help to fix my broken inverter

    Check all those MOSFETs for shorts. That's the starting point.
  2. ramussons

    Hi everyone My name is GODWIN and have been working on a simple light intensity control system using the attached circuit but both my res burns

    I think that location your Capacitor and Resistors (pot and 3.9K) in the schematic need to be interchanged.
  3. ramussons

    Does anyone know what this component is?

    It is a Surface Mount Device - SMD. Could be a Cap, Resistor, Diode or Inductor. If there is no marking, or location in a schematic, we'll have to test it for all possiblities.
  4. ramussons

    clock movement battery

    Why not put a 1 farad capacitor floating at 1.4 volts? 2 x In4007 in series gives 1.4 volts. The current drawn by the clock is very small. My idea calls for a 1.0 F 5 Volts and 0.1uF/400 VAC cap, 3 1N4007 diodes, 220K and 220 Ohm 1/4 watt resistors.
  5. ramussons

    Simplest mosfet circuit with ghosts....

    The schematic shows floating gate of the Triac. Not rtecommended. Connect a 12 or 15 K resistor between the Gate and the point marked L. That might solve the problem of false triggering.
  6. ramussons

    How to drive a 12v 40w heating pad

    Do you have access to a spare computer PSU? That will do fine.
  7. ramussons

    Is This Inverter circuit working with 9-0-9 transformer and 15v battery

    That is an oscillator which gives a high voltage at the output. There is no voltage sensing and there is no certainity of 220/230/240 volts at the output. But it will work for low power loads like a LED lamp, since the input voltage range of LED lights pretty large. Dropping 15 volts to 9 to...
  8. ramussons

    Tube Receiver Audio Matching Transformer

    The 600 Ohms is characteristic of overhead telephone wire. The receiver may have been part of a network that uses phones. Try using a output transformer from an old transistor amp/radio.
  9. ramussons

    Battery Charging in Inverter

    I have a generic diagram of an Inverter cum charger. Hope it is useful.
  10. ramussons

    Battery Charging in Inverter

    In most simple low power Invertors, the battery charging "Rectifiers" are the protection diodes of the switching MoSFeT. There is normally a relay that feeds the rectifier, in your case, a Triac. My gut feeling is that the battery is Dead. Unless there is a battery voltage of at least about 10...
  11. ramussons

    Get oscillator

    You did a great job!!! Now the Gates of both the FET's are floating............ And there is no power supply....... :D
  12. ramussons

    Get oscillator

    Confusing drawing of the schematic! Which is cross over, which is a joint - only a good electronics hobbyist can figure out.
  13. ramussons

    First generation devices with rework and frequency adaptation

    What do these these do? What are they used for?
  14. ramussons

    I need firmware of this router. If someone could help me out, it would be greatly appreciated.

    Simply showing a photo is of not any help. At least something on the Make / model..... may get some help.
  15. ramussons

    what mosfet to use for an induction heater

    Never heard of an Induction Heater operating at these switching Frequencies!
  16. ramussons

    Original way to use car radio as a garage radio

    I think you'll also need a pair of speakers, no?
  17. ramussons

    Thyristor/triac gate resistor size

    You are missing the fact that once the Triac fires, the voltage across the resistor will be nearly 0 volts! So the wattage of the resistor would be 0 x 0 /11000 = 0.
  18. ramussons

    Landline (VOIP) Caller ID

    The caller ID is sent by FSK or DTMF between the rings. In my country, it is DTMF, and in US it is FSK (?). You can tap the display outputs or make a decoder.
  19. ramussons

    Landline (VOIP) Caller ID

    No sir. FTTH is a pure internet connect with voice on internet protocol - VOIP.
  20. ramussons

    Landline (VOIP) Caller ID

    If the VOIP network (FTTH) is part of the public network, yes it is possible. But not sure if a VOIP network can carry the caller ID from a Mobile or LL phone.
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