Search results

Search Forums New Posts
  1. Alec_t

    Not working 12v dc to 220v Ac

    Yes. The paste ensures good thermal contact between FET and heatsink so that the heatsink can do its job. Btw, have you checked your 555 oscillation frequency? Simulation indicates that for the component values shown the pot would have to be set to less than 1k if you want the frequency to be...
  2. Alec_t

    Not working 12v dc to 220v Ac

    Do you have thermal paste between the FETs and their heatsinks?
  3. Alec_t

    Looking for more help with my electronic ‘bagpipe’ project...

    This is a long shot, but as there seem to be two switch-mode power supplies in the box it's just possible they have slightly different switching frequencies resulting in a low interference beat frequency somewhere in your circuit. Try using screened wiring, e.g to/from the pots, for all signal...
  4. Alec_t

    limiting a heating element in a water heater?

    Enough to be dangerous, it seems. :) Don't mess with mains voltage unless you are aware of and accept the risks, especially in view of this being for a water heater. Unless your heater is very low wattage those resistors are unlikely to be useful for this project. A thermostat is what you need...
  5. Alec_t

    Not working 12v dc to 220v Ac

    True, but the rise and fall times would be shorter with a lower-impednce driver.
  6. Alec_t

    Not working 12v dc to 220v Ac

    Your circuit does not provide any dead time between the two gate drive voltages. Because of the finite turn-on and turn-off tmes of FETs there will be brief moments when both FETs are conducting simultaneously. This results in high 'shoot-through' current which causes the FETs to heat up. Also...
  7. Alec_t

    doubt smartphone battery

    Delete all apps.
  8. Alec_t

    doubt smartphone battery

    Yes.
  9. Alec_t

    doubt smartphone battery

    Any covering on a phone will make it run warmer than if there were no cover (unless the cover is providing intended insulation from exposure to a heat source). Unintended warming of electronic products should be avoided where possible, as it can shorten component life (albeit perhaps by not...
  10. Alec_t

    555 LED Circuit not playing nicely

    Leakage current through C1 can be a problem with time periods longer than a few seconds.
  11. Alec_t

    Simulation of MOSFET

    Welcome to LTS simulations. The default MOSFET symbol that you are using needs a model card to work properly. Remove it and replace with the NMOS symbol from the drop-down component list, then right-click the symbol and select a 'proper' MOSFET from the library list.
  12. Alec_t

    electrostatic actuators

    Electrostatic loudspeakers were marketed half a century ago. I haven't checked if they're still available.
  13. Alec_t

    Fire alarm using a PTC as a sensor.

    Check the switch in the relay. Do you see a problem there? What do you think the comparator output will be if the PTC resistance increases?
  14. Alec_t

    Ir2110 attempts

    Welcome to maker.pro! Please post your asc file.
  15. Alec_t

    Injector driver

    That may be so, but the correct timing information (pulse start time and duration) would nevertheless have to come from the ECU which you say is not working properly.
  16. Alec_t

    Injector driver

    Then how do you know it will provide the correct signals for controlling any home-built injector driving arrangement?
  17. Alec_t

    Injector driver

    There are serious safety concerns with controlling a 3.5L engine. Will your insurer be happy knowing the injection is controlled by a home-brew bit of electronics? Have you checked if there are strict vehicle requirements in your country to comply with? How will you control the injector timing...
  18. Alec_t

    DC Motor spinning with battery, but not after DAC

    Is that the normal running current of the motor? If so, the start-up current would normally be several times greater.
  19. Alec_t

    Help With automotive gauge cluster

    A linear voltage regulator is not the same thing as a MOSFET. However, it may well include a MOSFET as part of its circuitry.
  20. Alec_t

    Can you discern the circuit ?

    The breadboard layout doesn't make any sense to me. It looks like the LED cathode is connected to the 2n3904 collector pin. ??? All Joule-thief circuits I recall seeing require coupling between two inductances, which is not present with the individual inductors shown.
Top