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  1. kellys_eye

    Testing a diode with a 9V battery tester

    What's one of those? Is it a tester for 9V batteries? I think you'd be better served by getting yourself a proper test meter - they aren't expensive (a few $) and could assist with many other forms of fault location.
  2. kellys_eye

    Remote control circuit of old TV?

    I've got some 'feelers' out to see if I can find something more useful...... will post back here if I find anything.
  3. kellys_eye

    Radio to mp3 player conversion.

    Pin 9 is through the pre-amp. The MP3 device is likely to not require pre-amplification and the main amplifier input is via pin 4. Plus it's easier to find the volume control!
  4. kellys_eye

    Radio to mp3 player conversion.

    At the volume control is the usual place. Apply your input directly across it - might need a capacitor to block DC, depends on the schematic. Can you post it?
  5. kellys_eye

    Remote control circuit of old TV?

    Can you post a picture of the TV set - and a close-up (readable) image of the rear cover? I can't find any results using Google which I find to be strange!
  6. kellys_eye

    Magneto kill terminal...

    Works the other way around doessn't it? i.e. the connection is 'grounded' to allow the spark to be generated and 'open' to shut the spark off.
  7. kellys_eye

    Electromagnet vs Neodymium magnet

    Electrically produced magnetic fields are far more common than neodymium magnetic fields - and infinitely easy to control! Exactly the same field (flux) capabilities too - solid magnets have fixed field strengths but electro magnets have variable field strengths. Search for electro magnet use...
  8. kellys_eye

    Remote control circuit of old TV?

    Matsushita is 'Panasonic' (I think) and the protocol for their old remote controls is: http://users.telenet.be/davshomepage/panacode.htm It doesn't state which device is used to generate this code and it may now be an obsolete device anyway but you can always use an Arduino (or similar) to...
  9. kellys_eye

    Remote control circuit of old TV?

    No, bu the datasheet for the receiving chip will identify the sending chip as they form a 'pair' - indeed the datasheet for the receiver may well show a schematic for a working circuit for the sender side. Other datasheets on the same type of device have done so (as I found some years ago when...
  10. kellys_eye

    I'm looking for 12v. LED's in red and yellow that cast light like a regular bulb.

    No 'single' LED I know of has 100% coverage for luminance output - they are ALL limited by their physical construction. The best results I ever had from a 'modified' light LED source was when I put white LEDs into ping pong balls!
  11. kellys_eye

    Remote control circuit of old TV?

    List the devices (IC's) on the circuit board beside the IR module (IC10, IC11???). You can get datasheets for 99.9% of all IC's from the likes of http://www.alldatasheet.com/ that will show all the required information.
  12. kellys_eye

    Internet schematic OK

    Beats me why @tedstruk bothered to hand-draw the schematic when he could have posted a link to it!
  13. kellys_eye

    Remote control circuit of old TV?

    If you can find the schematic for the set you can discover the model of remote control IC that was used and, from that, the coding that the chip uses or, potentially, an actual matching 'sending' chip.
  14. kellys_eye

    Information on Sun Electronic Engine Testers Models EET 1120 and EET 920

    Those are 'vintage' devices only suited for pre ODBII-enabled vehicles. For garages that used to service 'lots' of vehicles they were quite essential but, over time, the DIY market filled with individual handheld products that achieved the same functionality - dwell angle measurement, timing...
  15. kellys_eye

    Internet schematic OK

    If you bung the schematic 'title' into Google image search it's the first one that comes up!
  16. kellys_eye

    Reducing music in videos

    You could use the text facility on modern TVs to 'read' the lips!
  17. kellys_eye

    What to Do With a Lot of Salvaged Speakers?

    The internet (via China) is full of small audio amplifier modules that could be used with these speakers. You could wire a number of them in series/parallel combinations to get a 'decent' impedance (8Ω would be a good place to be) and make a pair of cabinets for a stereo solution; you can...
  18. kellys_eye

    Reducing music in videos

    The circuit you link to uses back-to-back diodes that will limit ALL audio above a certain level - but the 'limiting' will be in the form of clamping and will severely distort the resultant output. Since the speech is actually part of the music you can't reasonably or easily separate them -...
  19. kellys_eye

    Please can I have some help with a boost/buck convertor?

    An actual picture of the board(s) you are using, how you've soldered to them and the wiring/arrangement of the potentiometers would make a HUGE difference to how we can respond to this problem.
  20. kellys_eye

    Hello,, can someone identify components in a Gallagher M4000 ?

    Show us an image of the device connected to your Fluke and the reading on the display. What is the 'mustardy yellow' covering on the component? Can you scrape it off?
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