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  1. Alec_t

    lecture de la température d'un capteur LM35 et l'afficher sur une LCD en utilisant deux pic 16F88 vi

    Bienvenue chez AAC! Nous ne faisons pas vos devoirs pour vous. S'il vous plaît, soumettre votre meilleur effort (en anglais) pour faire cette mission.
  2. Alec_t

    How do you control this? 4681jb1029j motor

    I suspect the motor should work on 12VDC, as you tried, but its internal commutation circuitry is faulty. Welcome to EP!
  3. Alec_t

    Problem with Ramp signal Generator using IC 555

    Check your maths. The voltage at the R1/R2 junction is not 4.33V if Vcc=5V.. What value have you assumed for Vbe?
  4. Alec_t

    PROTEUS SIMULATION ERROR.

    Welcome to EP! Members here may be reluctant to open a rar file . Can you post a jpg of your schematic showing reference designators and values for all components?
  5. Alec_t

    I Want to Create a Revolutionary Table Fan!

    So you're aiming for a consumption of only 10%-50% of 33W = 3.3W-16.5W ? That won't be enough energy to shift much air.
  6. Alec_t

    Splatter in relay

    The plasticiser in some plastic/rubber parts can separate out into a gooey mess over time, but I'd be surprised if such parts were present in a relay of the type shown.
  7. Alec_t

    I Want to Create a Revolutionary Table Fan!

    Do you want to make just one fan, or hundreds of thousands?
  8. Alec_t

    Looking for Replacement 4700 uf 25v Capacitor to Fit My Subwoofer

    There has to be a reason if the caps failed. Have you checked D204, D205 and ZD202 ?
  9. Alec_t

    how to properly connect fingerthump potentiometer

    I don't know what a 'fingerthump' pot is (I assume it's thumbwheel operated, or musician-speak for some other type). For volume control you will need one dual-track pot or, if you want independent control of the two channels, two single-track pots. The only dual-track switched pots I'm familiar...
  10. Alec_t

    Radar Magnetron

    What do you mean? Welcome to EP!
  11. Alec_t

    Need a comparator but don't have one?

    If the comparator switching threshold isn't critical you can just use a single Schmitt trigger gate, e.g. CD40106, with its input resistively biased above/below the inherent threshold as required.
  12. Alec_t

    Generator & Battery in Parallel

    Me too !
  13. Alec_t

    Generator & Battery in Parallel

    What will drive the generator?
  14. Alec_t

    Generator & Battery in Parallel

    You could connect the battery via a power diode to the motor. The higher of the generator voltage and the battery voltage (less the voltage drop across the diode) will determine the voltage applied to the motor. Welcome to EP!
  15. Alec_t

    Anyone come across an electronic battery?

    Sounds a simple enough task for a micro, e.g. the ubiquitous Arduino. Have a PWM-controlled voltage source, a current shunt, integrate the voltage across the shunt and switch off the voltage source when the integral reaches a predetermined value.
  16. Alec_t

    Timing circuit using LM339

    Yeah, that too ! :)
  17. Alec_t

    Unequal heating elements in series - brain fog trying to work it out!

    ? Not according to Mr Ohm and Mr Watt. The 75W element has a resistance of 115^2 /75 = 176Ω. The 40W one has a resistance of 240^2 /40 = 1440Ω. In series their total resistance is 1616Ω, so at 240V they would have a total wattage of 240^2 /1616 = 33.6W.
  18. Alec_t

    Uploading LTspice files

    Many members here use LTspice for circuit simulation. The circuit data files it uses are non-executable, text-based and have standard extensions .asc and .asy. Currently the site won't allow these to be uploaded. Could you please configure the site to allow their upload?
  19. Alec_t

    How can I change in LTSpice 555timer frequency??

    What tolerances do your real-life timing components have?
  20. Alec_t

    How can I change in LTSpice 555timer frequency??

    Can you post both your LTspice .asc file and a schematic of the actual circuit in which your 555P is being used? What load is the 555P driving? What oscilloscope results are you concerned about? How is your scope configured and connected?
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