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  1. Minder

    12v receptacle

    If needing simple polarized 2 pin connectors that are high current, the RC suppliers have them, there is a small selection of different types, the XT60 is a popular one. M.
  2. Minder

    RS422 to RS232 converter.

    This show it a little clearer, you may be able to adapt it. The 4 IC's on the left are 2 75179b, the one on the right is a MAX202. Half way down. http://forums.mrplc.com/index.php?/profile/52109-akahige/&do=content&type=forums_topic_post&page=2 M
  3. Minder

    RS422 to RS232 converter.

    I will see if i can find my own print I made, M.
  4. Minder

    RS422 to RS232 converter.

    Just use half the circuit if only one direction needed! Worked for me. M.
  5. Minder

    RS422 to RS232 converter.

    The Beijer one no good? 3 ic's M.
  6. Minder

    RS422 to RS232 converter.

    I built one for for converting bi directional RS244-RS232 to a Mitsubishi PLC, it is based on the Beijer cable version, The IC's used are a couple of 75179 and a MAX202. M.
  7. Minder

    How could I get this 12v LED bar running off 240v ?

    The ones on ebay are 10amps which is minimal. M.
  8. Minder

    How could I get this 12v LED bar running off 240v ?

    There are LED strip supplies such as this ebay 291819364724. M.
  9. Minder

    Where to start

    These have been around for a good while and recommend get a footing in assembly first before going to C. http://www.gooligum.com.au/tutorials.html M.
  10. Minder

    12 pin Connector

    There is normally a MS connector number marked on it around the base. That is a Burndy, but there are few suppliers, Amp, Amphenol etc, they aren't that cheap! M.
  11. Minder

    Pulse circuit to operate Latching relay

    A magnetic latching relay, requires a shot to latch, another to unlatch, retains memory on power loss, if needed. M.
  12. Minder

    Switch 24Vdc signal using opto transistor

    Where you take the signal from depends on what logic you want to detect, either is acceptable. Positive logic or Negative logic. M.
  13. Minder

    CNC Plotter with DVD stepper motors

    If you have managed to put together step/dir drives for the steppers, then you just need the free S/W such as Mach3 etc M.
  14. Minder

    12 V motor loss of power

    I could see it being 1μf if it is part of the phase angle control into a diac etc. M.
  15. Minder

    Inductive load on relays

    Can you post the schematic of your set up, including power supply details? It sounds a little like your power is collapsing maybe when the motors are on line? The snubber is raising the voltage?? M.
  16. Minder

    motor problem.

    Whether it will run on 12vdc OK all depends on the torque demanded by the application. Load decides torque = current. The max RPM will also be that much lower. The automotive battery supply was suggested just for a test, not the permanent supply. A supply could be as simple as a suitable...
  17. Minder

    12 V motor loss of power

    You just have to compare the popular KB DC drives, the simple version is the 2 quadrant SCR bridge which is OK but a little primitive in that it is noisy at low rpm, Their PWM version is much superior, more parts and a bit more money, but worth it. IMO. M.
  18. Minder

    motor problem.

    And why is that? There are simple 555 based PWM controllers on ebay for just a few $$$'s that will give you a soft start. Or build your own if you have the ability. M.
  19. Minder

    12 V motor loss of power

    He did mention that the motor was replaced, so unlikely it has ruined another as I would expect to see some ill effects as soon as it was connected. M.
  20. Minder

    motor problem.

    Try back driving the motor if you can, it may be hard if a high ratio gear reduction. But you should get a generated voltage that is proportionate to 24vdc at 2800rpm . Is it possible the G.B, has a problem? You can use an automotive battery but care taken if there is a short circuit. M.
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