Search results

  1. Minder

    Help with A123 transistor.

    What data sheet?, for the I.C.? Anything else connected to the IC Pin12? If the IC was open collector output, the Tr collector could also be connected in parallel. Left appears to be emitter. M.
  2. Minder

    Help with A123 transistor.

    If you can identify the power planes + and -, then a resistance check to each from the 3 pins should point to it, with a PNP the emitter will be towards the +ve rail. and collector to the -ve. The base somewhere in between. Nothing back yet. M.
  3. Minder

    a led light box should be with 3 lines wire or 2 lines wire?

    Not sure of the regulations in China, but in most parts of the world that have a grounded neutral, any metallic case or enclosure that is AC supplied should be earth grounded. The exception for a 2 wire AC power supply is if the device is double insulated type. The neutral and earth ground...
  4. Minder

    Wanted: Industrial Keyboard

    I have used this silicone covered KB in the past for factory shop floor use. The membrane can be changed out if it gets worn etc . The military style MS connectors are cheaper in the plastic version CPC style by TE. M.
  5. Minder

    Help with A123 transistor.

    A voltage measurement of the original transistor connection should confirm it, preferably with the old one removed. M.
  6. Minder

    Help with A123 transistor.

    I have a post into a supplier for original pin out clarification. M.
  7. Minder

    Help with A123 transistor.

    Legend toward you, pins down, left to right, e,b,c. M.
  8. Minder

    Help with A123 transistor.

    In that application I would not expect it to be that critical, most likely any close PNP would suffice. M.
  9. Minder

    Help with A123 transistor.

    NTE126 it is common for the 2SA to be left off the number. 2SA123 PNP. http://alltransistors.com/transistor.php?transistor=7090 M.
  10. Minder

    Single phase motor

    Not really much more that already given. Do the two reds still show the C.F. SW in series? M.
  11. Minder

    New apartment getting shocked on light switch screws.

    If you can see a small spark from your finger, It does point to static charge. You could take a switch plate off and see if there is an earth ground conductor, but I am guessing the electrician would have checked that. If there is a good ground on the switch, then the source is coming from you...
  12. Minder

    Single phase motor

    From my perspective that does not quite make sense, you have a C.F. Sw in series with not only appears to be the run winding and no cap in series? When the switch opens you are left with two winding's which appear to have capacitors connected?? M.
  13. Minder

    Single phase motor

    V2 is a power junction terminal And V1 & V2 have power across them for both directions, so the explanation in #30 doesn't quite make sense. M.
  14. Minder

    Temperature Controller for Oven

    For a electronic version of a oven controller there is the Picmicro AN958, even comes with code! There is also Fairchild AN-3006 for non-micro version. M.
  15. Minder

    Single phase motor

    From your post on #19 it looks like the 250uf goes from Z2/W2 to V2. the smaller cap 40uf goes from U1 to V2. M.
  16. Minder

    Transformers

    It is a transformer for a SMPS (switch mode power supply). Higher frequency application that 50/60Hz. Could also be a double mode choke. M.
  17. Minder

    Single phase motor

    The OP mentioned he opened the motor up, I assume this was an alternative to rotating it? If the switch opens up V2 then this is where the 250uf would be switched. gregrae is there any connection to the Z2-W2 and U1 from the other terminals? M.
  18. Minder

    Single phase motor

    It is usually one or the other, either external or centrifugal, which the OP claimed it had in the TS. But changed his mind in post #24. It is not a PSC motor so the 250uf is normally switched out at start. M.
  19. Minder

    By-pass cooker clock

    If you can see the reverse side of the board, you can check to see if those connection simply go to a relay. If so you should be able to find a replacement, or possibly jumper the connection if they go to a N.C. contact etc., I just replaced a similar one that switches the oven on, Cost: $3.00...
  20. Minder

    Single phase motor

    Then there should be an external current detect relay to switch out the start winding and 250uf cap.. M.
Top