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Recent content by stephen-7486

  1. S

    simple timer needed please help

    i need some help with with a timer circuit that will hold the output high for about 30 seconds when power is applied and then go low indefinetly until it is powered down and turned on again
  2. S

    need n-channel equiv to IRF4905 or STP80PF55

    need n-channel equiv hi all i need to find the n-channel equivalent to ether irf4905 or stp80pf55 can anyone help chears steve
  3. S

    Need a circuit for generate stable clock

    i need a square wave at 5V at 2.4kHz steve
  4. S

    JFET equations considering temperature value

    try to get a copy of practical electronics calculations and formulae by F.A.Wilson it's an old book but it's helped me a few times steve
  5. S

    power for the future please help

    im designing an inverter to run with generator and will be running rather big heatsinks but not that fussed because it dosent use fule to run or start so thiers no problem with it leveling a back yard if it blows up steve
  6. S

    Need a circuit for generate stable clock

    stable is within 0.01% to 0.1% preferably closer to 0.01% so extreamly stable steve
  7. S

    Microcontroller based DVM 300 V ac & dc

    it would be easyer to buy a cat 3 rated digital multimeter
  8. S

    How to Calculate Distance Between Cell phone/GSM modem &

    Re: How to Calculate Distance Between Cell phone/GSM modem & the only way to calculate distences is to set up atleast 3 modems and find a program that uses triangulationto find the location of the phone steve
  9. S

    Storing electronics in a static heavy plastic container bin

    Re: Storing electronics in a static heavy plastic container a cheep way try placing ic's through tin foil into styrafoam
  10. S

    Car Engine sound synth, creating a looping buffer

    try using a simple 555 timing cuircut to reset the loop steve
  11. S

    Need a circuit for generate stable clock

    generating a clock i need a curcuit to run a clock that is stable and dosent wander off frequency. i have tried 555's and had no luck can anyone help thanks steve
  12. S

    Step-up converter causing disturbances in radio

    try earthing the case of the step-up converter to ground i know it works with dc/ac converters steve
  13. S

    Active Phased Array Simulation

    if you hav a prototype of the antenna try using a folded d antenna or an antenna tuned to the frequency that you want to receve and buy or biuld a simple sine wave generator at that frequency to tranmitt a signal and use an ocilliscope ,if avalible, to monitor it steve
  14. S

    SNR - peak-to-peak or RMS?

    signal to noise or carier to noise in terrestrial tv broadcast and most other broadcast's is just a mesurment in dbm between the noise floor and the signal level eg: a signal level of 75 dbm ( optimum signal for terrestrial tv at the outlet ) has C/N or S/N of 45.8 dbm therfore the noise floor...
  15. S

    Audio Circuit Problem

    try using an 8 ohm to 600 ohm audio transformer. the audio output may be a little noisy but may work. just an idea steve
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