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  1. Minder

    120 AC to 120 DC

    The OP mentions 3.8HP which is no mean motor, also a DC motor has maximum torque at zero rpm and stays fairly flat up to the max rated rpm. M.
  2. Minder

    Wires and Power Supplies

    Can be if the terminal capacity is exceeded for comfortable termination. Just because it works does not make it optimum.:( M.
  3. Minder

    Wires and Power Supplies

    12ga is each a 20 ampacity conductor, do you need that much? You could try it on an automotive battery to see what exactly the current is. M.
  4. Minder

    Wires and Power Supplies

    Sounds a s though the P.S. is going into shut down, due to over load? 12Ga is a little excessive for that current. Make sure you have no shorts and test the resistance across each of the conductors. M.
  5. Minder

    Help Programming 16x2 LCD - PIC16F73

    Yes, I only use Assembly but if you look at TUT3 of Nigels site it shows the status of each command and should make it clear what happens for each function, See http://www.winpicprog.co.uk/pic_tutorial3.htm I use the read busy status of the display rather than use a delay, but both work. M.
  6. Minder

    Circuit Schematic Design Software

    I have been using the free open source Kicad, after giving up my old Orcad DOS version, it is for schematic and board manufacture but it is in sections so you would only need to use the schematic part, the advantage is the number of symbols etc and the ease of modifying/creating a new module. It...
  7. Minder

    transformer identification

    Most likely a SMPS power supply so a switching transformer and a OEM part, possible. M.
  8. Minder

    Running three phase delta on single phase

    The PhasePerfect S.S. invertor also uses the 240v 1ph passed directly though for 2 of the phases as does the RPC, they are also 120° 3ph. M.
  9. Minder

    Running three phase delta on single phase

    Single to three phase invertor is usually a solid state device achieving the same thing. RPC uses a motor as a generator. http://www.metalwebnews.com/howto/ph-conv/fig1.html You will see some sites that state (in error) the 3 ph are not 120° apart. M.
  10. Minder

    Running three phase delta on single phase

    I have built some of the popular 3 phase generator (RPC) that became popular in the '90's, these use a 3ph motor ran off of 1 phase to produce/generate a three phase output 120° apart. For a small motor it will work just as well, been done many times. M.
  11. Minder

    Running three phase delta on single phase

    If it is a sub fractional motor you may get it to run by using a motor run rated capacitor in series with one of the windings to obtain a phase shift as is done with 1ph motors. The other two would go to the supply, do you have the 1ph voltage available for the same rating as the 3ph motor? M.
  12. Minder

    Hi Newbie senior Citizen with some knowledge

    Got me stumped too!:( M.
  13. Minder

    AC motor speed controller as a regulated transformer?

    This is exactly what many have done in building a hot wire foam cutter, using a dimmer type (Triac) control in the primary, (I prefer to control the secondary). but whatever works for you. M.
  14. Minder

    What component is this?

    That is a SMT Resistor, it does not necessarily need to be the same shape, appears to be at least 2watt. M.
  15. Minder

    DC Motor Driver (SCR type)

    One way of full wave rectification is to use a centre tapped secondary of the transformer and a diode in each outer connection and in this case the centre tap is the circuit common or "GND" M.
  16. Minder

    AC motor speed controller as a regulated transformer?

    You are not going to find much, that is practical that is, without a transformer, even a Variac is not galvanically isolated. M.
  17. Minder

    DC Motor Driver (SCR type)

    There is no source of GND shown unless it is a CT transformer supply with the CT being GND otherwise the two SCR's do not make sense? Also other sections are referenced to GND which shows Earth GND symbol, BTW. M.
  18. Minder

    electronic speed control for drill motor

    You can either feed it from a home made 555 based PWM controller or if you can find one with high enough rating on ebay, these run around $5 to $10 just needs a bridge rectifier on the AC feed. http://www.discovercircuits.com/DJ-Circuits/simplepwm2.htm A universal (series) motor operates in a...
  19. Minder

    AC motor speed controller as a regulated transformer?

    You could add a bridge on the output of the triac controller and use a large electrolytic cap for smoothing. M.
  20. Minder

    electronic speed control for drill motor

    If it is a Universal motor (has brushes) then you can get a $25-$35 speed controller for power tools, other than that, Google Triac controller to build one. M.
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