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  1. ante1

    The mechanical construction side of my Stirling engine project.

    Hi Dazza, Wow! Nice video, I like this gizmo! ;D  I have seen a couple on the net and I have been thinking about trying to build one. The sealing of the piston and the membrane, what are they made of? Is the membrane exposed to high temperatures or could it possibly be made of leather? If you...
  2. ante1

    6V Ultra-Bright Chaser

    Hi Audioguru, Now you know why they gave you the extra LED! ;D ;D Good work, with service bulletins and everything!
  3. ante1

    DC MOTOR SPEED CONTROLLER

    Referring to the specs: “The kit and motor use the same power supply. Since the maximum operating voltage of the LM324 is 32VDC then this is also the maximum voltage available to run the motor”!  I understand this as; the circuit will work at 24VDC, but if I am wrong about this I have to...
  4. ante1

    Need some electronic add-on ideas for my new project (Stirling engine)

    Hi Dazza, You need a well balanced lightweight flywheel with some small magnets evenly attached around it. Then make and fit some fixed coils close to the sides of the flywheel, put some load on the coils and you will soon find out how much load it can carry before it stops dead in its tracks...
  5. ante1

    DC MOTOR SPEED CONTROLLER

    Hi Alun, I know that, but it depends on how much the voltage has to be lowered. Anyway it’s a stupid point to discuss since mb9 was going to use it for 24Volts so I don’t know why I even mentioned it! Back to square one, I still say this circuit works!
  6. ante1

    Salvaging Computer PSU

    Hi magatru, You need a minimum load to get the output right as mentioned, a 4R7  >10W resistor on the 5 Volt output will do the trick. A couple of LEDs will probably not be enough as a load, but they form a good indicator though. 8)
  7. ante1

    arc welder schematic

    Hi Edu, Well, a switcher is much more complicated than any”normal” transformer welder. You might consider a standard transformer circuit maybe? I think I got a link somewhere if it would help you. Are you going to try to build a welder or is it just curiosity? ;D
  8. ante1

    Good Books?

    Hi Tekker, There are 6 books on this site, but i’m sure you have noticed this. :D
  9. ante1

    High Quality electronic sites

    Hi Guys, I have many links, here is one from Sweden! http://hem.passagen.se/communication/meny.html
  10. ante1

    Construction design!

    Hi Alun, OK that’s fine, but where is the picture?? ;D
  11. ante1

    Motorola Hi-Fi power amplifier

    Hi Audioguru, Yea, I can see what you mean but it’s like using an “overload” to play with!  ;D ;D
  12. ante1

    car battery charger

    Hi Audioguru, Fuse?? Why use them they just break all the time! No, but seriously no blown fuses, the short bursts of current combined with the resistance in the battery leads (a few meters of 1 sq/mm) can be the answer. And if you have ever had a completely flat battery you might have...
  13. ante1

    DC MOTOR SPEED CONTROLLER

    I agree if the motor voltage is higher than 32 Volts (as the spec says) the circuit must be separated. Its easily done by opening up the circuit at D3 and put in a regulator. 
  14. ante1

    motor selection?

    Hi guys, The solenoid solution could work even simpler than that. A normal spring loaded solenoid can easily be controlled with PWM like a proportional hydraulic valve. It might require some kind of damper (shock) to move smoothly. The return spring will provide some safety in case of power...
  15. ante1

    nokia 3310

    Hi kerem, Would this be any help? [attachment deleted by admin]
  16. ante1

    motor selection?

    Hi Ron, I have seen steppers used in these devices but I am sure there are several ways to do it. Back in time they used a kind of vacuum servo for this purpose. 
  17. ante1

    Construction design!

    Hi Ed, Oh I see, well I’m looking forward to your next post then!  ;D ;D
  18. ante1

    arc welder schematic

    Hi edu, I am not sure exactly what you are looking for but let’s try this one: Welder_-_lorch_handy_s200.pdf
  19. ante1

    DC MOTOR SPEED CONTROLLER

    Alun, From the schematic I can see no reason to have separate power for the motor, but I might be wrong.
  20. ante1

    Create circuit for 4-20mA simulation

    Hi, You need a LM 317 a few resistors and capacitors and a pot. That’s how I would do it.
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