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  1. ramussons

    Circuit design help needed

    * Generate 5 clock streams. You will need 5 clocks if the clocks are random. Else you may be able to generate one from another. * User logic gates with a counter to select the required stream. * Using uP's may be over engineering.
  2. ramussons

    Problem with DC

    That's due to leakage of the mains supply through your 9 V Adapter. The "floor" forms part of the "return" for the leakage. The plastic chair is a good insulator. Replace the Adapter with a battery and this will not happen.
  3. ramussons

    2 motors pushing an object. 1 motor goes bad... other keeps going... object breaks???

    What you have done IS the Most Simplest way :D The not-so-simple way would be to use a Current sensor (shunt) to monitor the motor currents and disconnect the power feed if it exceeds a set value. You can also incorporate a temperature sensor along with this "electronics" and get a pretty good...
  4. ramussons

    Check if schematic is correct

    Ok. Tks. :)
  5. ramussons

    Longer wire = weaker motor performance???

    What is the voltage across the "sluggish" motor and at the power supply output when the motor is "sluggish"?
  6. ramussons

    Check if schematic is correct

    Would someone be kind enough to tell me just what is this circuit? :D
  7. ramussons

    DC-DC Voltage Step Down Module

    Do I get paid?
  8. ramussons

    Check if schematic is correct

    Unless we know what is it that you are attempting to do, it will be difficult to give an answer. Please give some details....
  9. ramussons

    How does this work?

    Is this addressed to me or the OP? :D and I think the OP has been truly scared off..... :eek:
  10. ramussons

    How does this work?

    The IC is a comparator whose o/p is HI. When light falls on the LDR, it goes LO to trigger the 555. Not too sure about the 555 wiring........
  11. ramussons

    Data Selector Inverters And Nand Gates

    7400 is a NAND gate; your schematic does not show it being used; there is also a OR gate in the schematic. Or are you asking a schematic for a Data Selector using 7400 and 7404?
  12. ramussons

    DC RC circuit with buzzer

    Presume: Buzzer requires 12 mA to make a sound. The series 1K resistor will not permit that current. The capacitor charges to a voltage when the Buzzer starts sounding discharging the capacitor and finally stops. The cycle repeats. Replace the the Resistor in steps to 470 Ohms, then 330...
  13. ramussons

    Switch problem. Please help

    Your wiring of the toggle switch is OK. The problem is elsewhere as you have rightly concluded. Does the unit work when powered on using the slide switch? If yes, the you need to use a 2 pole toggle switch, the second pole terminals connected to the terminals above A and C.
  14. ramussons

    Switch problem. Please help

    How about a photo of the other side? The idea is to see how many copper tracks are terminated on the switch. Hopefully, it's not a multilayer board.
  15. ramussons

    USB Diverter

    Ok, I stand corrected. Yes, the 4 pole 2 way switch will provide total isolation.
  16. ramussons

    USB Diverter

    * If the terminals T1, T2, T3 and T4 as shown is USB2, then it's permanently connected. Switch B1 will connect (I'm not saying that the transistor setup will work) USB3 without removing USB2. That's paralleling I mentioned. * If the PC1 has 5.1 Volts, and PC2 5.2 Volts, there will be a current...
  17. ramussons

    Voltage Drop Question

    Voltage drops are proportional to the resistances which are in series.
  18. ramussons

    USB Diverter

    USB pins 2 and 3 carry the traffic, so only these 2 lines need to be switched. But for complete isolation, all the 4 lines need to be switched. Why not use a 4 pole 2 way slide switch (or 3 way, or even 4 way)? Is'nt it much simpler? ps your schematic will not isolate the keyboard from the...
  19. ramussons

    Change output voltage on a switching PSU

    "...... fiddling with the feedback...." and changing the under voltage trip point.
  20. ramussons

    Hey from me

    Contributions can be "doubts" too .... :D
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