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  1. KrisBlueNZ

    Toshiba 32BV701B audio fault

    Well, I found a service manual for the 32BV700B on Elektrotanya at http://elektrotanya.com/toshiba_32bv700b_chassis_17mb45m-3.pdf/download.html. I expect this will be pretty similar to the 701B. But that manual doesn't have a full schematic, and it doesn't show the audio circuitry. Can you take...
  2. KrisBlueNZ

    Current bypass

    OK, the /SP11 version has a primary resistance of "less than 51 mΩ" so it could be damaged by currents higher than the specified 1.5A, although again, the data sheet doesn't state a maximum allowable input current. Also, with the higher input resistance, it may be feasible to connect something...
  3. KrisBlueNZ

    Current bypass

    OK, that's better! The LA25-NP current sensor has a very low insertion resistance and can withstand pretty large overloads. Unfortunately the data sheet is pretty poor quality, and it doesn't give an absolute limit, but it does say that even with the five primaries connected in series for...
  4. KrisBlueNZ

    Current bypass

    That doesn't help much! It's just a bunch of rectangles! What's the voltage? What's the relay type? Is it the coil or contacts that you have in the circuit? What's the part number of the Hall sensor? Which pins are connected in the circuit? Or are you using it to measure the current through a...
  5. KrisBlueNZ

    Wii U Component identification

    OK. Let's wait until we have a good photo of that component.
  6. KrisBlueNZ

    Wii U Component identification

    Based on the circuit reference, I guess it's a filter of some kind - probably a combination of small inductors and capacitors arranged as a pi filter or a T filter. For reducing emission of, and susceptibility to, conducted interference on the power cable. Can you upload a picture of the DC...
  7. KrisBlueNZ

    Wii U Component identification

    That pic is the same size. We need one taken at a higher resolution.
  8. KrisBlueNZ

    Current bypass

    Your description isn't clear. You need to upload a diagram.
  9. KrisBlueNZ

    Toshiba 32BV701B audio fault

    Are you sure the model number is 32BV71V? I get no hits for that model number except for this thread here!
  10. KrisBlueNZ

    Stage Line 500W amp repair project

    Hey! You've done some good work there, Pete! You used some of the machine screw sockets so you can easily remove and reconnect Q46 and R108, and your soldering is excellent! I don't see anything wrong but I'm worried about the brown goop around those electrolytics. Some types of goop have been...
  11. KrisBlueNZ

    countdown timer

    OK, try this. Change R13 from 220Ω to 100kΩ Add a 0.1 µF capacitor across SW1
  12. KrisBlueNZ

    How can µF-range capacitors reduce AC voltage?

    Still can't see it. Save the image to your hard disk then upload it as an attachment to your post.
  13. KrisBlueNZ

    How can µF-range capacitors reduce AC voltage?

    What Harald said. Each LED would only illuminate for a maximum of half the time. Also, LEDs can't be used in a bridge rectifier generally because they will be damaged by a reverse voltage of more than about 5V. But what you're suggesting is a bridge rectifier with its output shorted out; this...
  14. KrisBlueNZ

    Using $1 stereo amp in mono mode

    I don't think there's any expectation that the host will "enforce" the limit anyway. The slave is supposed to obey the limit to avoid overloading the host's power supply, but if it doesn't, the host isn't expected to disconnect it or take any other action, AFAIK. The host may have a resettable...
  15. KrisBlueNZ

    countdown timer

    OK. Can you repost your schematic with higher resolution, with pin numbers shown on the ICs, and a white background, so I can annotate it.
  16. KrisBlueNZ

    how to wire a model KK6039T motor control

    Hi there and sorry for the slow reply! It looks like the PDF you linked in post #2 answers your questions. The speed control potentiometer (10 kΩ) connects to terminals S1, S2 and S3, with the wiper connecting to S2 and the fully clockwise end connecting to S3 so that speed will be maximum at...
  17. KrisBlueNZ

    Current bypass

    Start by showing us a schematic of what you want to do. Include information such as the voltages, whether it's AC or DC (and if AC, the frequency) How quickly do you want the bypass to activate and deactivate? What is this project for? Tell us about the REAL components and the reason for...
  18. KrisBlueNZ

    Induction motor

    What design work have you already done? What have your tutors told you? What sites have you searched using Google?
  19. KrisBlueNZ

    Light following robot

    What range of voltages do you measure across the LDRs from no illumination to full illumination?
  20. KrisBlueNZ

    Using $1 stereo amp in mono mode

    OK, cool. Well, you can get a bit more power if you use two or more speakers. You can feed the signal into both channels of the amplifier, and each output can take 1x 4Ω speaker or 2x 8Ω speakers. But if you want a single speaker, make it a 4Ω speaker and use just one channel. So, upload the...
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