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  1. Minder

    Shock from arduino

    If you are getting a shock from the 0v conductor or frame of the PC, then it definitely points to no earth connection. Obviously the PC should be connected to a 3 pin outlet to obtain the ground connection. To check the GND connection itself on the SMPS, do a resistance check from one of the 0v...
  2. Minder

    Multiple AC inputs relay (light PLC)

    This was also suggested in another forum posted to, using off the shelf Opto22's. M.
  3. Minder

    Shock from arduino

    If your Arduino is fed from the PC PS and is properly grounded you should not receive any shock. If no ground in the SMPS itself, it is usually bonded to the case by the MB screws. I would check the validity of your earth conductor from the outlet etc. M.
  4. Minder

    Shock from arduino

    Your Arduino project must have live chassis WRT the earth GND. You normally will not get one from a PC as the SMPS in all the ones I have ever serviced has the power common connected to earth GND. It is most likely that you do not have a proper earth conductor. M.
  5. Minder

    Fuse length and you! For your health!

    Actually you can get them with wire ends already on, if needed. You can solder to them, as long as you make a successful connection, (no dry joint etc). M.
  6. Minder

    Articles- Slight Error

    And yes I knew there was only two as I did manage to survive the last one!;) M.
  7. Minder

    Articles- Slight Error

    In the recent articles The Major Differences in Electrical Standards Between the U.S. and Europe By Sam Holland, mention US being 110v service voltage, the standard has been set since the end of WW11 as 120v/240v. M.
  8. Minder

    240 V water heater ground and neutral

    Neutral is also used as a term for the star point in a three phase transformer, which is what jurisdictions such as UK and Australia etc use. where a phase and the star point neutral forms the 230v 1ph service, also the neutral is earth grounded at the star point. M.
  9. Minder

    240 V water heater ground and neutral

    His avatar shows USA. Ah yes, when I took my UK training it was 3/029 and 7/029 for principle residential conductors!;) That was half a life time away. M.
  10. Minder

    Pulse Width Modulation

    One example. http://www.discovercircuits.com/DJ-Circuits/simplepwm2.htm M.
  11. Minder

    Pulse Width Modulation

    Can you post the circuit? Normally you only need one 555 for PWM for a motor. M.
  12. Minder

    Stator removal help

    This appears to be a wound and then baked stator, what purpose do these devices serve?, they appear to be a form of rpm sensor, resolver etc , they appear to me too small to be a form of motor attached to the large item shown. M.
  13. Minder

    240 V water heater ground and neutral

    You require a 4 pin socket. Usually a dryer requires 240v 120v Neutral and GND (4 pin plug/socket). You should be able to read the 240v and 120v with a Fluke meter. Do not ground to any other connection than a properly ran earth GND conductor originating at the panel. IOW you need 3 wire and...
  14. Minder

    240 V water heater ground and neutral

    No neutral required, and I would do as you suggest, 8ga and 50 amp breaker. If this is a dual element water heater, sometimes the top element is just for short low demand operation and switched over to lower for large demand, shower etc. M.
  15. Minder

    Not-reversible fan motor ?

    If no capacitor, then they most likely are (typically) shaded pole motors, if so, the only way to reverse is to swap the rotor 180deg if possible. Although the apparent pole count, appears to put it in a different category, ECM? M.
  16. Minder

    what motor

    Is this a 12vdc source? If so there are quite a selection of small geared DC motors out there with different gear ratios. M.
  17. Minder

    12V power supply

    Simple, Take a few turns off the secondary! M.
  18. Minder

    Machine Tool Repair

    The best idea is to use the logic in the ladder, but unfortunately, Mazak which uses their own version of Mitsubishi control, makes it hard for any on-site changes to ladder. You may have to make use of the 2sec signal into a separate outboard PLC controller. Modern T.C. generally put tool...
  19. Minder

    Relay with small in size

    If you go to Digikey site, you should find all you need, this is a smaller footprint, 399-11052-5-ND. Do you actually need DIP spacing format.? M.
  20. Minder

    Relay with small in size

    That is a DIP size spaced format complies with 2.54mm, do you need the same? Those are available quite cheap, AliExpress etc. M.
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