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  1. dorke

    Amp keeps going into protection mode

    Next is checking for DC voltage on each output. It should be very low (less than 100mV,ideally zero ). You do that with the amp powered on. First do it with volume at minimum and note the results. Then(If the above didn't find anything abnormal) crank up the volume to the point the amp goes...
  2. dorke

    Amp keeps going into protection mode

    For diode testing the bottom one. For ohm 2k Range the other. You can do both for each output, remember,amp disconnected from power.
  3. dorke

    Is this circuit possible?

    Colin In order to answer that , and see the light of day for the first time in a very long time, You do need to take your head out of your butthole. Guess it is not possible in your case,is it? You're feeling too comfy that way...?:( And with that said you are on my ignore list.
  4. dorke

    Is this circuit possible?

    @Steve, If that means putting that dick-head Colin on the ignore-list I'm all for it.;) Please forgive my language, I couldn't hold it ...
  5. dorke

    Amp keeps going into protection mode

    With the Amp disconnected from power test resistance of each speaker output between (+) and ( -) [red and black]. Should be high on all output channels.
  6. dorke

    Amp keeps going into protection mode

    If you crank the volume up with the speakers dis-connected what do you get?
  7. dorke

    Amp keeps going into protection mode

    Those it flash alternating,Red Amber?
  8. dorke

    Amp keeps going into protection mode

    Any flashing LED? Any code on the display?
  9. dorke

    HV flyback psu

    Please probe the base of Q2. (if possible in the same time with the collector,using 2 scope channels). And show the voltages and time on the pic.
  10. dorke

    load cell equations

    Welcome to EP. You need to provide the diagram of the circuit, without it isn't possible to help you.
  11. dorke

    Understanding if this circuit

    Please don't let us guess .
  12. dorke

    Woodwork machine playing up

    Welcom to EP. A photo of the capacitor would be helpful. How many contacts does that "common" start capacitor have? There exists multiple capacitors in a single case. like the one below (4x40uF). If this is your case ,you can swap caps to identify a faulty one. Depending on the motor (a photo...
  13. dorke

    Is this circuit possible?

    Let me repeat a free advice(you probably know it,but anways ) "better safe than sorry". And "Don't be penny wise and dollar stupid"...I think it is from Hop;) The difference in price between a SPDT and a DPDT is very small, 2 schottky diodes will cost you 1$ or less. Use the circuit in post #2...
  14. dorke

    Help selecting the correct Diode

    Nice of you to put the video in. But,did you watch it and understand it ? The shottky diode is the way to go with such applications, not the silicon diode one.
  15. dorke

    Help selecting the correct Diode

    Well, Who said anything about speed? It's the Vf that makes all the difference! At about 2A and 25C The 1N5821 shottky diode will drop about 0.35V, while the 1N5408 silicon diode will drop about 0.85V. That is a significant difference in loss of voltage feed, and in a lesser way efficiency...
  16. dorke

    Help selecting the correct Diode

    Not a good choice, A shottky diode is better. I wouldn't mount it in a harness. In case of mounting near each power supply 2 separate diodes ( 1N5821) are needed. In the case of mounting near the solenoid a common cathode Dual diode (VFT1080C) may be helpfull.
  17. dorke

    Is this circuit possible?

    I think it would be better to switch the (+) and not the (-) , with a DPDT rocker switch,and for "added fail-safe" insert schottky diodes to prevent 12V power "collision" . Like so:
  18. dorke

    Crowbar Circuit - Help !

    It is a pass,see how simple:). The 10K value is the max. recommended, yielding a 40K -no such exact value in the 5% standard values , 40.2K is the nearest in the 1% standard values. I would use a lower value. Looking at figure 9 , the manufacture uses a 2.7K for R2. Using 1% accuracy...
  19. dorke

    Crowbar Circuit - Help !

    Welcome to EP. If you have build that Buck/Boost DC-DC power supply by yourself, The over-protection circuit is a piece of cake for you , all the info you need is found in theMC3423 datasheet. If there are specific questions come back and ask.
  20. dorke

    IC 78XX

    Bob, Today's hatch-lings look at us as "dinosaurs" ;) They live in the instant (everything)-world , including instant education . Next App.(android or any-other) is EE Bsc in 2 months and Msc in EE in 3 months:(
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