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  1. C

    UNO heatsink???

    Quite frankly.... no if it's getting warm consider switching to transistor(s)
  2. C

    Where can i buy this zener Diode or what is that?Please i need help

    B2 looks like a scottchy diode to me.... But it may have been a tvs diode.
  3. C

    V-Reg Board for Breadboard use

    Use the 7805 because you require 5v ... But the 5v may not provide 5v maybe 4.8v, the 7806 too 5.8v not always depends on the manufacturer. . So the trick is to adjust the "gnd" pin, it's actually a ref pin... to get a precise 5v use a potentiometer, a quick way is to use a diode to gnd.
  4. C

    SMT's

    Smt construction brought up bad memories... Carefully getting out the smd components, then once you have them 10 seconds later they're gone!
  5. C

    Component Question

    you'd only ever use a resistor divider on a component which requires extremely little current or the voltage will sag and what was say 9v 5v suddenly becomes 3v . The voltage regulator's job is to maintain a constant voltage.
  6. C

    Broken SMD - need suggestion for replacement

    1uf max.... I'd try 0.1uf or 1uf whatever fits, probably just a decoupling cap.
  7. C

    Charge battery while running off of alternator

    What your suggesting is really not difficult, my concern is up in the air, a lead acid battery produces hydrogen under charge... Down on the ground not a problem, I worry about the kaboom part even though it's very unlikely but I don't think I could stomach hearing a fatal air accident.... air...
  8. C

    Why I don't like arduino.cc

    As mod, that's your right... I only have an issue if you tell me I can't have an opinion.
  9. C

    Why I don't like arduino.cc

    I'm giving my opinion as a user of that site... If the moderator did his job and dealt with the bully instead of the victim (after repeated complaints) I'd never have needed to voice my complaint... Are you saying I'm not allowed my opinion here? What you see is just the end result after...
  10. C

    Why I don't like arduino.cc

    I would say use the arduino forum but as of late I was banned for defending myself against a bully and after Masizmo (founder of Arduino) removed my ban I was left with an ip ban... This is what followed from a mod... Long story short, the mods allow members to bully and when I'd retaliate...
  11. C

    PCB Printing

    I've been using Eagle Cad, exporting the gerber? (Sounds like gerbil) files and then they can supply multilayer (s) boards.
  12. C

    Charge battery while running off of alternator

    I'm thinking a mechanical relay that gets switched on to charge the little battery once the planes alternator (or turbine?) Powers up. A microcontroller or voltage comparitor could be used to determine that the generator is on (due to the higher voltage) which in turn begins to float/charge the...
  13. C

    What would happen IF?

    Best off not using it and buy a 110v rated transformer, finding the correct sized transformer remounting it... the trouble it would cause you.. Another option is to buy a 110 to 240ac transformer just so you can use your german 240v... Hardly worth the effort or power loss stepping up down and...
  14. C

    12v to 5v regulator beginner problem

    Anything over 500ma from > 12v and you should consider a switching power supply rather than a linear one like the 7805
  15. C

    Has Miniaturization Killed the Hobby Enthusiast?

    http://m.ebay.com.au/itm/251602661617?nav=SEARCH There are adapters like that for other different types as well
  16. C

    Faulty AC-DC Adapter?

    Basically you have/had an old iron core transformer, I like them for powering circuits to be honest as I'm always in contact, the last thing you want is your 110/240vac to 12vdc is to fail... Cheap supplies can kill. As to why, it needs to be under load to supply the correct voltage, 2nd...
  17. C

    Has Miniaturization Killed the Hobby Enthusiast?

    Absolutely not... Let's take the lm386 amplifier, you can still buy dip16 and now sop16, a lot of the old chips come in smaller and smaller sizes, sure it can put people off but it should not there are many adapters that convert sm chips into regular dip sizes to place on a breadboard... So...
  18. C

    An interesting 1w flasher.

    http://www.edn.com/design/led/4432212/HB-LED-flashing-beacon-repurposes-switching-regulator Basically for less than 5 bucks off ebay you can buy 50 off them the mcp4063 is cheap and that's why I like this 1watt flasher because of it's inbuilt current limiter circuit.. Not yet built it, but...
  19. C

    Sony STR-DH820 A/V Receiver Not Powering On after some time of disuse - Help!

    Could be a dry joint, but it sounds like a simple enough issue, open it up take some photos, don't touch the boards inside as there msy be some high voltage charged caps... The click is the relay which suggests part if not all the power supply works, could be as simple as a cable falling out.
  20. C

    Blowing a 3A fuse with an AA battery?

    Most have 10a current measure when you move the lead on your multimeter, and well you should be safe up to a 10amp fuse... If the battery can't blow the fuse, it's not likely to do much harm in a short either..
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