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  1. kellys_eye

    Clothes dryer fault

    Ah yes, the old 'colonies'..... still 20 years behind the rest of us o_O:D:p
  2. kellys_eye

    K10A60D Transistor

    You could try cutting away the aluminium (sorry, for our American friends I meant 'aloominum') tab over the IC and fitting something with a better thermal radiation factor - a nice black, many-finned, miniature heatsink would simply glue on top.
  3. kellys_eye

    Terminal Block and Ring Connectors

    From the specification sheet that applies to the barrier block.... The manufacturers site will reveal all.
  4. kellys_eye

    XR2206 DIY signal generator kit.

    Check out his Youtube channel too - his technical description of the circuitry is very good - a little 'dry' (but that's his way) but overall you can happily sit through a session, no problem.
  5. kellys_eye

    XR2206 DIY signal generator kit.

    The level of accuracy most people require isn't as demanding as you'd expect. 1% is easily good enough for most amateur work and even cheap meters meet that! There are some spectacularly good meters-for-the-money out there today - so much so that getting three or four and rigging them up in a...
  6. kellys_eye

    Clothes dryer fault

    Given that replacement elements are relatively cheap, why take the time, trouble and risk rather than simply replacing it. It's a 5 minute job.
  7. kellys_eye

    K10A60D Transistor

    Overheating could be caused by an overload on any one of the supply lines (to the control circuitry) and the usual suspect is the backlight. If you can identify the wires feeding the backlights you can temporarily disconnect them and run the set to check for overload tripping. Some care is...
  8. kellys_eye

    Identify smd inductor

    D7 is the reverse polarity protection diode and T1 a simple filter - it should be conductive twixt in and out. The FET in the middle is a switch - via PWRON - and the IC at the top is the converter for the main 5V supply.., Reversing polarity shouldn't (in theory) have blown the diode.
  9. kellys_eye

    XR2206 DIY signal generator kit.

    The significant advantage of modern DSO's for me is their ability to automatically measure signals and, on some models, auto decode serial data too. Such facilities are 'just' software - as is the base performance spec of some models (deliberately de-rated in software with Youtube having some...
  10. kellys_eye

    Home theater subwoofer power supply fault

    The little round 'brown' things are fuses (1902, 1904, 1907) - have you checked them?
  11. kellys_eye

    Different Pass filters for different speakers.

    As I said above.... use one amplifier for each speaker and fit active filters at the amplifier inputs such that they only pass (and amplify) the range of frequencies you want. You can make quite 'steep' filters using RC networks or even better ones using a simple op-amp configured as a filter...
  12. kellys_eye

    Help finding this board for a sliding gate motor

    ....that's why I said the relays were 'suspect'.
  13. kellys_eye

    Help to identify markings in schematics

    ...and if it points BOTH ways it's a bi-directional signal (usually a data line). The problem with schematics is that there are a number of international standards that can be used - ANSI, IEC, BS (British Standard) and IEEE. You can get the actual specifications of those standards to see the...
  14. kellys_eye

    Different Pass filters for different speakers.

    You could also use active filters at the input to the amplifiers. These can be made with far more accurate (and steep) responses. Look into 'reflex cabinets' too - the best speaker systems have cases that actively assist in sound reproduction using internal baffles, wool etc.
  15. kellys_eye

    XR2206 DIY signal generator kit.

    Nice to hear of the enthusiasm the hobby generates. Nothing wrong with making mistakes as you learn too - providing you actually LEARN from them....! Little bit of advice though - if you feel the hobby is going to 'go somewhere' for you then by all means get those small circuits to 'play with'...
  16. kellys_eye

    Help finding this board for a sliding gate motor

    Hmmmm - almost entirely discrete parts (one IC) so should be simple enough to repair. Those relay contacts looks a bit dodgy though - suspect contact cleaning and/or replacement relays will fix the issue. Close pics needed - hopefully with the relay clear plastic covers off.....
  17. kellys_eye

    K10A60D Transistor

    http://pdf1.alldatasheet.com/datasheet-pdf/view/348745/TOSHIBA/TK10A60D.html Basically a 10A, 600V N-channel MOSFET, sub 1Ω Rds(on) - you should be able to find many devices that meet or exceed those values at most retailers in the UK (Farnell, RS etc)
  18. kellys_eye

    Induction Heater Diy, How To Improve Performance?

    A simple 555 astable will allow you to change the pulse frequency by varying a single resistor rather than having to adjust two capacitors. not quite - C3 and L1 will have a resonant frequency according to the formula I posted above (assuming you know what the value of L is). You adjust your...
  19. kellys_eye

    Nostalgia

    Beats the 256 BYTES my first PC had...... it had an optional 2k memory upgrade but the £300 to purchase the computer itself (in 1979) was all I could afford at the time. By the time I had enough money to afford a memory upgrade technology had moved on enormously and it wasn't worth the effort!
  20. kellys_eye

    One cell power bank troubleshoot

    You are unlikely to 'improve' the circuit. Key to its operation is the controlling IC and without reference to its datasheet you will have to reverse-engineer the board to derive a schematic.
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