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  1. WHONOES

    Explanation of a circuit

    Could use an elctromechanical buzzer / sounder.
  2. WHONOES

    My IC chip isn’t working properly

    You may have damaged it with a static discharge from you body removing and replacing it in your breadboard.
  3. WHONOES

    Peak detector for piezo drum pad

    Strictly speaking, the circuit you have included on #5 is a rectifier but can be use as a peak / pulse detector. You just have to make C and Rl large enough to hold up for a significant period. Also, it will only reflect the peak value of the input signal. If that is not high enough to trigger...
  4. WHONOES

    How does a decade counter IC 4017 works?

    If you feel you need a bit more information, the 4017 is what is called a Ring counter or a Johnson counter. Follow the link below for a description. https://en.wikipedia.org/wiki/Ring_counter
  5. WHONOES

    JFET Power Amplifier With Output Transformer

    When I played many years ago, I used a clean amp and then used distortion generators to give required effect. If I remember correctly, the Kinks got the distortion they wanted by cutting slits in the speaker cones.
  6. WHONOES

    JFET Power Amplifier With Output Transformer

    Also, having a quick gander at your transformer, there is way to little magnetic material in it to produce any substantial output at low frequencies. Ferrite toroid's are not really suitable either. You really need a laminated transformer. Breaking down and re-winding an old mains transformer...
  7. WHONOES

    JFET Power Amplifier With Output Transformer

    Google sub harmonics.
  8. WHONOES

    JFET Power Amplifier With Output Transformer

    No. The harmonics can be lower as well as higher. Some transformer distortion is caused by the non linear region when the magnetising current passes through zero and produces harmonics.
  9. WHONOES

    JFET Power Amplifier With Output Transformer

    You appear to be measuring the output without the transformer connected. If that is so then what you are showing on your scope trace apart from the clipping on the + rail is crossover distortion form the output transistors not being properly biased. How many watts are you expecting to get from...
  10. WHONOES

    Large motor start up

    PWM and some big fets.
  11. WHONOES

    555 or one shot

    The thing is, you don't learn anything just buying bits off ebay. I thought that was the point of this forum or did you miss that?
  12. WHONOES

    Power distribution in a project

    I agree with Bob K. Proper power distribution and decoupling capacitors are paramount.
  13. WHONOES

    555 or one shot

    What's difficult about a couple of transistors a few resistors and a capacitor.
  14. WHONOES

    555 or one shot

    Forgot to mention, LED goes in collector of Q3.
  15. WHONOES

    555 or one shot

    See attached circuit for a very simple timer. How it works: R1 and R2 serve to charge C1. Because C1 cannot charge instantaneously, R3 is pulled up to the +12V rail. turning on Q1 and Q2. Q1 and hence Q2 will turn off when as C1 charges, the voltage at the top of R3 reduces to about 4V. As well...
  16. WHONOES

    What's the "danger zone" for tesla coils?

    It's current that kills not voltage. The resistance of the human body varies from about 1KΩ to around 100KΩ depending on conditions. 100mA is generally regarded as enough current to kill instantly. A tesla arc can easily be in the mega volt region and cause enough current to flow through the...
  17. WHONOES

    Controlling Goteck Linear Servo Micro Analog 1.5g GS1502

    Above comment should have read 1.1ms to 1.9ms. My finger trouble!!
  18. WHONOES

    Help needed on portable battery project

    You could use a 12V car vac converted to blow instead of suck and power it from a large 12V battery in conjunction with a solar panel or wind turbine.
  19. WHONOES

    Industrial saw burnt out relay repair

    Looks as though the board is already shellaquared with those burnt tracks. I'd follow the "Minders" advice for repairs. What caused the burn out in the first place?
  20. WHONOES

    Centre tapped Transformer

    What diodes are you using and what value is you smoothing capacitor?
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