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  • Users: mooimooi
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  1. mooimooi

    Missing solder point on pcba assembly.

    Hi there! Need a bit of some guidance from pcba assly gurus; You see, I have double sided pcb and on this i mount only the following components. a) resistors - 3 pieces , total 6 solder points. b) Photo interruptors - 3 pieces, total 12 points. c) Hook up wires - 12 points In total I have 30...
  2. mooimooi

    Motor brake coil voltage.

    Hi, Just curious to know why most motor brake and clutch coils are mostly designed or rated in DC voltage and not in AC. In the case of ordinary relays used for control purposes, they can either be constructed in AC or DC. Thanks Chandran.
  3. mooimooi

    High voltage ac to dc converter.

    Hi , I have 240VAC mains and i need to get this converted to 240 VDC at 60A. Is it possible to just use the high power rectifier diodes constructed in a bridge array, with just one electrolytic capacitor. Thanks
  4. mooimooi

    Circuit for DC to DC Convertor.

    Hi I need to convert a DC 200V supply to 24VDC,10 to 15 Amps for battery charging purposes in a boat. Is there any commercially available converters available? WOuld appreciate also if anyone can provide me a schematic to build one. Thanks in advance..
  5. mooimooi

    Hi, We are using RF connector

    Hi, We are using RF connector for our audio systems. One of the specifications of the connector reads as follows.. " Resistance shall not exceed 0.6Dohm at 1 amp at each contact. I need to know what this spec means and how to go about measuring this parameter. In fact this is the first...
  6. mooimooi

    Searching for driver transistor for stepper motor.

    Hi, Would appreciate anyone out there who could help me getting datasheet for this transistor C2553 or its equivalent. One of the 4 driver transistors (could be a darlington) for a 2 phase steppter motor is spoilt and I need to replacement. This looks like a Japanese make product. The maker ID...
  7. mooimooi

    Searching for force transducer.

    Hi Is there anyone out there who could advise me the various force tranducers that can be used for monitoring the crimp force from an crimping press in order to detect crimping abnormalites such as missing crimp, over and under crimp, damaged crimp etc. The ones that we are currently using...
  8. mooimooi

    color sensing tranducer.

    Hi there, Would appreciate anyone out who can recommend a low cost color sensing transducer for checking the wrong color orientation in wire harness asssembly. I know Keyence do have some types (mainly fibre optic type) , but they are quite expensive. Can we use any other sensors? Regards
  9. mooimooi

    Seaching for zener diode manufacturer.

    Hi, Would appreciate anyone out there to help me with letting me know the manufacturer of the voltage regulator. This regulator was burnt during operatiions. The regulator is part of the component of a PLC KEYENCE model KV-10R. Marking on the regulator is as follows. ZNR...
  10. mooimooi

    Circuit diagram for "miswired circuit"

    Hi there, I had earlier requested a test circuit that would test for miswiring circuits for harness wire checking. Messrs Laffalot and Nbucska were helpful indeed to supply me the diagram that uses alot of digital components and a pc. Would appreciate if someone out there could help me with...
  11. mooimooi

    Speed control of Induction motor.

    Hi, Would like anyone out there who could provide me a circuit on to increase the rpm of the following motor, Brand name : Oriental Motors 6W, 230V, 50HZ, REV:120RPM. I believe the speed can be controlled by changing the frequency. I am operating this motor at 230VAC 50 HZ, and I am quite...
  12. mooimooi

    Need a schematic for testing "miswire circuits"

    Hi, Is there anyone out there to help me with providing a test circuit for testing "miswired circuit" for a harness?. The harness may range from 2 way to 20 way. Thanks Chandra

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