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  1. Rleo6965

    Help me fix Silent Gliss/ Rako roller blind controller

    It seems the board was working . Did you try apply ac 220v to the blind motor or +12V on DC motor ? if any. This is the only way to know which is not working. It's much better if you use ac outlet with circuit breaker. For safety. AC motor might be defective or stuck up. Check ac motor for...
  2. Rleo6965

    atx smps help

    Are you using Digital Multitester? I think this atx power supply was for your PC and your reading those dc voltage on Bios Voltage Monitor. Those were not accurate reading..
  3. Rleo6965

    How to repair this

    You should have test your connection for short circuit before plug-in the ac outlet. It's possible that some loose wire strands have short inside plastic outlet or connector. Don't use that plastic connector.:D Next time you strip the ac cord wire in such a way that wire connection will not...
  4. Rleo6965

    problem with tip122 at high volt

    I told you. I think your BJT need heatsink.
  5. Rleo6965

    problem with tip122 at high volt

    LM7805 was a +5V fixed output regulator. Higher Vin was needed to be able to have +5V regulated output. Remember that you need to put heatsink if you use +12V as your Vin. LM7805. To avoid all this problem. Just connect your PIC to +5V psu. No need to use LM7805 and heatsink. Read this link...
  6. Rleo6965

    problem with tip122 at high volt

    If your using +5 to Vin of LM7805 it will not work. It needs at least 10V Vin to function properly. See datasheet of LM7805. Or just remove the LM7805 and directly connect +5V from psu supply to your PIC and other circuit. Place fuse to +5V and +12V for safety measure.
  7. Rleo6965

    problem with tip122 at high volt

    Are you sure your using +5V from pc power supply to supply input of LM7805? You should connect Vin of LM7805 to +12V not +5V. And if your using your pc power supply as dc power source. Place additional load on dc supply connector such as hardisk to have well regulated output from psu.
  8. Rleo6965

    hall effect sensors

    I got the meaning from here.:) http://www.urbandictionary.com/define.php?page=2&term=FFS
  9. Rleo6965

    hall effect sensors

    Hey. I like that KISS. It's another word I learned here in Electronics Point. The last one I learned was FFS from steve.:D:D:D
  10. Rleo6965

    hall effect sensors

    You can use Fig. 3 diagram #5 for scr. If your electronic Ignition project was CDI and SCR.
  11. Rleo6965

    hall effect sensors

    Zoom in to fig 4. Left pin=VS, center Pin GND. Right Pin= OUT.
  12. Rleo6965

    hall effect sensors

    Much better if you post schematic diagram of electronic ignition system. So we can match the RS41 Hall sensor.
  13. Rleo6965

    problem with tip122 at high volt

    I'm about to re-edit my post because I remember that ULN2803 was a open collector device. So, you need a 10k pull up resistor. And also. Maybe you have to place inverters to the inputs of uln2803. So that don't have to re edit your program. Or the other way around. I've never tried using...
  14. Rleo6965

    problem with tip122 at high volt

    You wrongly placed 47 ohm as pull up resistor. No wonder the transistor was turn on to saturation because of +5V directly applied to the base. You should placed 47 ohm resistor in series between uln2803 pin 18 to base of transistor as base current limit resistor. Question: What is the DC...
  15. Rleo6965

    Is it possible to connect amplifier to a computer?

    My daughter connected her desktop computer to her Stereo Amplifier just 2 feet away from Computer. She connects audio cable from headphone jack output of the soundcard and connects to Aux Input of stereo amplifier. But the 60hz sound or hum sound was also amplified together with the music...
  16. Rleo6965

    (Radio Waves) Which Is Better...

    I'm referring to this. It's just like an announcer talking loud on 3 watt transmitter and another announcer whispering on 3 watt transmitter. Or maybe . I don't fully understand cjdelhi's question.:D
  17. Rleo6965

    (Radio Waves) Which Is Better...

    I prefer A. Because signal was amplified.
  18. Rleo6965

    Is it possible to connect amplifier to a computer?

    Yes. Be sure that computer and amplifier have the same ground connection or same plug on 3 prong ac outlet. Or else humming sound will be heard in amplifier.
  19. Rleo6965

    can you help with car alarm idea

    Try this simple circuit. Q1 and Q2 circuit configuration for Car Alarm output of 12V goes to 0V. If your car alarm output was 0V to 12V. Replace Q1 and Q2 circuit with Q3 circuit. Use small 12V relay for Q1 and Q2. Q3 might be bigger 12V Relay switch contact ampere. Depends on your load or Lamp.
  20. Rleo6965

    4017 Decade counter

    "Know your enemy before you conquer".:D Read the datasheet to get more information about cd4017. http://www.alldatasheet.com/datasheet-pdf/pdf/50846/FAIRCHILD/CD4017.html
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