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  1. C

    PCI breakout?

    Anyone seen a pci breakout board? I have a sound card which works fine except for 1 channel i thought a breakout board and power it up then probe for the dead ic(s) then replace the chip... I could not find anything so i bought the adapter, but a break out would be nice so i don't have to work...
  2. C

    Voltage Converter or Not?

    I'm not sure how to go about it hence the question... I was simply going to power it directly so you think 2 cells and a voltage reg to 5v is better than feeding it a single 18650 cell if around 4.10v? How about a 3v zener?
  3. C

    Voltage Converter or Not?

    http://cyntech.co.uk/downloads/neoway-m590-hardware-design-manual-v1.pdf The m590 says it's not 5v tolerant 3.9v max or there abouts... but if i run an Arduino and tjis m590 module from a single 18650 it will see around 3.8 - 4.0v It came in kit form so i'm going to solder or heat gun it...
  4. C

    DVD player freezes

    I remember DVD ... just :) Maybe there's some kind protection on the disc which is causing it to lock up
  5. C

    Making prison safer...

    Around the ankles then? Lol
  6. C

    Making prison safer...

    Computer controlled prison neck thingy, a waterproof sealed unit that goes around the neck of every prison inmate with a small LED to indicate it needs charging (solid means do it, flashing means you in big trouble if you don't charge) maybe the prison inmate can sit in a chair and inductively...
  7. C

    How to modify 12-24v car phone charger?

    Data sheet says 1.2a max for the switcher ic, yet the usb outputs are 1a/2a lol
  8. C

    Looking for cheap ammeter that measure the smallest amp

    Because you can adjust analogue meters with a screw driver i find them quite accurate...
  9. C

    Batteries in series

    They charge in series! Thank you....
  10. C

    Batteries in series

    Is it possible to charge 1 cell at a time with hook up wire to a dedicated ICs charging each cell independently... So 2 rows of 4v lithiums = 10v (A laptop battery) But powering a device requiring 10v in series? (I'm wondering how a laptop battery is charged? Two 10v chargers? Or individual...
  11. C

    Watts, Amps, and Volts Explained

    I thought about the water analogy and it does not quite fit If you imagine water flowing as the voltage, think of the amount of bubbles being the current, more bubbles more current more voltage faster the water flow
  12. C

    Question about capacity/battery

    Yeah use a specialized ic chip like a voltage bargraph or a microcontroller or 4 voltage comparators or even just discrete transistors and voltage dividers
  13. C

    Question about capacity/battery

    Unless it's a very high frequency you're going to get losses as heat from the inductor so if lucky 90 - 95% with a good switching circuit to step the voltage down and then losses in the switcher ic So yeaj stick with 7v battery if you can feed the camera directly
  14. C

    Serial port communication

    Either you host the webserver or the webserver runs a script which connects to your computer (port forwarding required on your router)
  15. C

    Need help with android app for Bluetooth device

    Spin speed? You going to mount the bluetooth module on the hard disk or something lol
  16. C

    18650 batteries not charging

    Either no protection or the cells are really bad, a true 2600mah battery costs around $20
  17. C

    18650 batteries not charging

    I've read stories of 18650 cells simply being removed from dead laptops repackaged and sold on ebay! Lithiums are easily destroyed by completely discharging it... to "revive" it enough to charge you need to supply it a few hundred ma of current at 4.2v until the voltage is high enough for...
  18. C

    Winter down under time

    Well today i got about 300ma from the stove cooker but the 2nd heat sink is just not big enough to disspate the heat, maybe water cooling and a pump
  19. C

    Winter down under time

    I thought i'd create an emergency light using a candle 2 heatsinks and a sandwiched thermoelectic plate a peltier device.. I got thinking with a fan attached to the peltier connected to the cold side, the fan would help cool the cool side making the fan spin faster? I'm wondering what kind of...
  20. C

    Do NOT do ANY of this! Safety first lol

    Basically everything he's doing here is dangerous and could kill you very easily, let's call him a walking educational class on everything NOT to do! Enjoy hahaha
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