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  1. kellys_eye

    sad device - no support - no fix

    Should be ok- try it.
  2. kellys_eye

    Repair of a ATI 7970m graphics card

    Rather than 'leaking' they look to be parts that have been retrofitted i.e they aren't the original parts..... The stuff you see seems to be flux residue from their fitting (soldering) - done badly and not cleaned off properly afterwards. Can you post a closer view? They are 47μF capacitors.
  3. kellys_eye

    Bosch Cordless Drill GSR 12-2 Charger testing

    The sonic welding relates to the plastic container housing the batteries (cells). Replacing individual cells is only advised if you have an old battery to salvage the required replacements from. Purchasing a complete set of replacement cells is simply not cost-effective. Short story - I won a...
  4. kellys_eye

    Amprobe LAS-800 spike, sag and surge recorder

    Good luck in your search - I appreciate the desire to keep the kit original and would do so myself under similar circumstances - unless the USE of the kit was more important to me.... then I'd just do what was necessary to make it convenient for myself. <thumbs up>
  5. kellys_eye

    Issue in BLDC motor

    Pop by Youtube and look for GreatScott who is, co-incidentally, doing a video on BLDC drivers using Arduino and he covers such issues as start-up over-current and modified waveforms to increase torque etc.
  6. kellys_eye

    sad device - no support - no fix

    0.03mH = 30μH and still 50% off what the circuit is designed to use. Also you cannot 'parallel' them - if you stack 'em you must electrically disconnect the duff one. Have you tested to see if the 12V and 5V lines are correct?
  7. kellys_eye

    Sketch question

    Put (move) the buttonstate2 line directly below the buttonstate1 line Put the if (buttonstate2) line below the if (buttonstate1) line Put the digitalWrite(relay2) line below the digitalwrite(relay1) line etc Basically you are 'combining' the two statement lines to be run successively and...
  8. kellys_eye

    sad device - no support - no fix

    Buck converter - this means a 12V supply to the board and 5V generated via that device. The spec states an operating frequency of 150kHz and the change of inductance can have a significant effect. http://uk.farnell.com/coilcraft/do3316p-223mld/inductor-pwr-22uh-2-7a-20-19mhz/dp/2287248 is but...
  9. kellys_eye

    Bosch Cordless Drill GSR 12-2 Charger testing

    It IS possible to solder directly to the replacement cells but I like to try to cut the old cells out but leave a decent amount of spot-welded tab on the one that remains in place to get at least one good soldering point! Use a HOT iron, ensure the surface to be soldered is well roughened, add...
  10. kellys_eye

    Amprobe LAS-800 spike, sag and surge recorder

    Very obscure rectangular socket with round pins: http://content.amprobe.com/manualsA/LAS-800_Surge-Recorder_Manual.pdf You may be lucky to find one by asking around sites such as this and the likes of Vintage radio equipment forums but I'd be looking to refit a more modern (IEC) type in its place.
  11. kellys_eye

    Bosch Cordless Drill GSR 12-2 Charger testing

    A sharp crack with a hammer on the welded joints may break it open enough to start the dismantling process. This is a 'nothing to lose' situation so go for it!
  12. kellys_eye

    sad device - no support - no fix

    As a stand-alone device the HDD interface takes either a DC input and will be required to 'develop' its own 5V and 12V supplies. The coil (broken) will be part of the SMPS conversion to generate this missing supply and the broken ferrite former will be affecting the conversion process. The...
  13. kellys_eye

    Bosch Cordless Drill GSR 12-2 Charger testing

    Given the charger/batteries are probably ni-cad based I'd go for dud cells in the battery pack, especially if the battery was more than 2-3 years old. If the battery pack internals are accessible via screws (and not sonic-welded) then making quick tests of each cell will quickly reveal the dud...
  14. kellys_eye

    Old colour CRT TV only displaying black and white!

    I came across this 'lack of colour' problem many years ago and it was similarly based i.e, a colour RF source would work on 'some' monitors but not all.... I was attempting to use colour CCTV cameras on the RF input of a particular LCD TV/monitor. ISTR that this was caused by issues with the...
  15. kellys_eye

    Help identifying this?

    Looks like a portable power bank to me. The row of LEDs beside the 'on/test(?)' button seems typical if the type.
  16. kellys_eye

    Building a New Fish Tank Stand

    I suspect the reference to the 100A breaker is really just mention of the main input isolator - many are rated at 100A but seldom have that kind of power levels passed through.
  17. kellys_eye

    Raspberry pi powering monitor?

    Power the MONITOR using a proper power pack that can supply 12V and at least 3.3A. Nothing else will do.
  18. kellys_eye

    Identifying and replacing diodes??

    Where abouts in the circuit are they located - input, switching, output? Got any pictures? I found the generic SF1-5 series here: http://pdf1.alldatasheet.com/datasheet-pdf/view/340172/RECTRON/SF5.html
  19. kellys_eye

    Old colour CRT TV only displaying black and white!

    Does the set auto-detect NTSC/PAL and what system is the modulator using?
  20. kellys_eye

    Building a New Fish Tank Stand

    A typical tank heater may be around 300W and lighting is 'irrelevant' as far as total power consumption is concerned so the total load would be well under the capacity of a single extension lead under most normal circumstances (i.e. 13A in the UK which equates to around 3kW).
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