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  1. kellys_eye

    SA-AK25 Deck won't extend out.

    There should be a small hole on the front bezel of the CD drawer. Straighten a paper clip and insert it in the hole and push - quite hard - and the drawer should pop open. You can then remove any offending disk (some can't be read and refuse to eject manually).
  2. kellys_eye

    Gear VR Internal Connectors

    That 'ridge' looks to be a polarizing pin - if you're searching try Digikey. I found the following: https://www.digikey.co.uk/product-detail/en/hirose-electric-co-ltd/DF37NC-10DS-0.4V(51)/H11854TR-ND/2230607 but there are many others...
  3. kellys_eye

    Problem with writing eeprom memory

    If you have tied all address and data lines to zero the programming function (assuming you get the proper 'low' pulse applied) will write whatever you have set on the data lines to the address you have on the data lines. Assuming all lines are zero then the programming pules should write 00 to...
  4. kellys_eye

    Problem with writing eeprom memory

    You will - a standard 'unprogrammed' EPROM is usually set to FF (all locations).
  5. kellys_eye

    Electronics Component BBS75A1Y-01

    Bear in mind you can't solder those things into circuit - they have to be crimped to the wires.
  6. kellys_eye

    Problem with writing eeprom memory

    Have you read the data sheet for the device? It gives all the details of the parameters needed to read/write from the device. http://ww1.microchip.com/downloads/en/DeviceDoc/doc0006.pdf When you've connected and tried to program the device according to the data sheet and still ahve a problem...
  7. kellys_eye

    Electronics Component BBS75A1Y-01

    There are other thermal fuses available - it doesn't have to be an exact replacement but provided it does the job (and fits the space) then any thermal fuse will suffice.
  8. kellys_eye

    Best place to buy parts and components?

    They have a UK outlet too...
  9. kellys_eye

    Low-ESR 1uF electrolytic (hard to find)

    'Normal' electrolytics are generally 'low' ESR when their values are small anyway. Low ESR is particularly useful in switched mode power supply circuits and the 105degC rating is preferred too but for linear power supplies this is less important than getting the correct value to keep the ripple...
  10. kellys_eye

    Configuration of HMR2300 Magnetometer

    Try a different USB/serial lead. There are known issues with some type of serial converter leads that prevent full communication.
  11. kellys_eye

    Rechargeable Power Supply Question

    You could always use the ubiquitous 18650 cell - there are many simple charging circuits for them and along with a boost converter to raise the output to 12V it would use the most modern/common parts. charger board...
  12. kellys_eye

    Rechargeable Power Supply Question

    so around 12 watts total consumption as a maximum perhaps? This would allow the fan to run for 3(ish) hours before recharging and equates to a 1Ahr battery at 12V - the smallest rechargeable battery you could find would probably work! If 'size' is an issue (often is.... giggidy) then you need...
  13. kellys_eye

    How can I make a fake cellphone battery?

    Fitting an external power adapter should be straightforward providing you can 'fool' the phone battery maintenance circuitry. Some batteries have internal circuitry whilst others are 'dumb' but they nearly all have temperature monitoring which may have to be bypassed. Post a picture of the...
  14. kellys_eye

    DG self starter motor and Dynamo

    Dynamo??? When was the DG made.... 1850? :D Sure it's not an ALTERNATOR? Two thin wires, one big fat wire? Can you post pictures of the unit(s)?
  15. kellys_eye

    Best place to buy parts and components?

    Small(ish) world....:p
  16. kellys_eye

    Help with a flashbulb project

    The 'basic' idea would be to remove the LED and connect a transistor in its place - use the transistor to switch a small relay and the relay contacts to short out the switch. Please indicate the TX/RX you are using and we can come up with a schematic for the alteration.
  17. kellys_eye

    Best place to buy parts and components?

    ....specifically? I was in South Shields for a good number of years.
  18. kellys_eye

    Calculating Resistance With Just Voltages? Basic DC Circuit Design

    All devices will only draw (take) the current they are designed to - you can fit a 1000A power supply to your Arduino and it will only 'take' what it needs i.e. 1A. Same applies to everything else you've got connected. Your power supply should be able to deliver a voltage that is equal to the...
  19. kellys_eye

    Raspberry pi Error

    Yes, moisture can wreck electronics but there is usually some visible signs associated with it. If the fault isn't readily apparent then, as mentioned, finding and repairing anything more than faulty leads, duff power supplies etc would be more trouble than purchasing a replacement board.
  20. kellys_eye

    Low-ESR 1uF electrolytic (hard to find)

    Either type will work. Tantalums are good for timing circuits or low ESR requirements neither of which are specific to the schematic you show (ETI magazine perhaps??) Solid capacitors (MKT, plastic film etc) would also work - although on the power lines I'd still use electrolytics.
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