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  1. Minder

    555 pwm controller.

    For one, you rarely need regulation for PWM/motor control, the demand cannot be that high if only a 1 amp Txfr? The drill motor must draw way more than that. A little more explanation of what you have and wishing to control is needed. You can obtain 555 controllers on Ebay for a couple of $$'s. M.
  2. Minder

    12v automotive relay how do you find amp rating ?

    This PDF generally applies to all Automotive simple cube relays and gives an idea of filament (resistive) or motor (inductive) load. M.
  3. Minder

    What kind of diode is this?

    Interestingly in testing the QRE1113 it appeared impervious to fairly bright ambient light, M.
  4. Minder

    Need help with wiring an electric motor

    Line in is 1 and 4 . M.
  5. Minder

    What kind of diode is this?

    The retro-reflectors such as the ones I quoted are all one piece unit, they are easy to trouble shoot if you use such as a white reflector you should detect a change at the transistor side output, usually a 10k pull up (or down) resistor. You may have to investigate as to the same pin out for...
  6. Minder

    What kind of diode is this?

    I see now that looks like a retro-reflector, there are several versions out there, QRE1113, CNY70 just to name a couple. One side is a LED emitter, the other the receiver. M.
  7. Minder

    Induction brazing?

    There are several designs out there for building a H.F. heating machine, Google Royer oscillator. A SMAW (stick welder) may be an option, normally in an industrial setting for silver soldering etc, the two parts are placed together and a ring of S.S. together with flux is place at the heating...
  8. Minder

    What kind of diode is this?

    How did you arrive that it needed replacing? M.
  9. Minder

    What kind of diode is this?

    Check to see if there is AC in to one pair, if so it is most likely a small Bridge. They typically are set up with the DC and the AC diagonal from each other as that appears to show. M.
  10. Minder

    Mechanical noise DC brush motor

    The armature sure looks like it has been overheated!, If the enamel has flaked off anywhere, then a short is possible. There is a multitude of 24V DC motors now that use P.M. field, rather than the older style wound field. M.
  11. Minder

    Mechanical noise DC brush motor

    If you look at the com end there is insufficient room for a bearing but there is a recess in the end of the shaft and at the top there appears to be a clip with a pip jutting out to engage it. At least that is my guess! M..
  12. Minder

    Mechanical noise DC brush motor

    I am trying to visualize the armature floating between the poles, there has to be some way to contain the armature? Although the armature end appears to be tensioned against a 'Pip' and an indent in the end of the shaft? It appears to be a very simple (crude) two pole motor. Probabally used...
  13. Minder

    Mechanical noise DC brush motor

    Check the obvious, bearings and brushes. What are you running it on (power?), it appears to be a very basic model. M.
  14. Minder

    PICkit 3 for Programming PIC16F627A

    http://www.winpicprog.co.uk/pic_tutorial_main_board.htm Easy to add a ICP 6 pin. For Vero board Prototyping Boards M.
  15. Minder

    PICkit 3 for Programming PIC16F627A

    This shows no longer available, but includes a firmware zip. link? http://www.microchip.com/developmenttools/productdetails.aspx?partno=pg164120 If not I can send it probabally via email. M.
  16. Minder

    PICkit 3 for Programming PIC16F627A

    Or pickit 2, which has a nice add on signal analyzer UART tester etc. Pickit V2.61. The Lab11 is not necessarily needed, there is also boards you can make simply on the Nigel Goodwin Tutorial site for this IC 628a. M.
  17. Minder

    When did the site get a nice new look? I like it! :)

    I don't see alot of difference? M.
  18. Minder

    Transformer Search

    Yes, the circuit demand decides transformer size of which is usually based on the core size and wire gauge and in turn determines (K)Va. M.
  19. Minder

    Treadmill control board repair.

    Also known as 'deep six'ed it' M.
  20. Minder

    Transformer Search

    Have you tried AnTec? He builds toroidal to order http://www.antekinc.com/ M.
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