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  1. OLIVE2222

    MOSFET Redundancy/Fail-Safe in Automotive System

    Hi MR.AWESOME, About the redundancy it will not suffice to parallel a circuit that can't be interrupted. You have described exhaustive s way to monitor and protect you Fet's but you still rely on the same µC to both drive it and ensure is protection. If you have a µC failure (hardware or...
  2. OLIVE2222

    Alternative to multiple shift registers?

    Hi, And in the multiplexing "family" the better one seems the Charlieplexing: http://www.maxim-ic.com/app-notes/index.mvp/id/1880 Olivier
  3. OLIVE2222

    Sherlock Holmes - Why did the diode fry?

    hi rockrockmcrock, Indeed if the diode is shorted they can't be damaged in anyway. What it can happen is that the 1C current was applied before setting the jumper, or the jumper was removed before the 1C current. Trash the diode and place a 2Amp one will make the stuff more bullet prof...
  4. OLIVE2222

    Help about transmitter and receiver

    Wa alaikum assalaam Asad, The 2.4ghz esky transmitter receiver is using the standard 1 to 2 ms pulse (ppm) to drive futaba servo's or alike. You relay circuit only reproduce a part of the inside servo circuitry. You lack the ppm conversion part! here under a link of how a servo work...
  5. OLIVE2222

    Desoldering eeprom - Hot air temperature

    Hi MrWho, The t° can be found in the solder manufacturer datasheet however for such kind of component hot air is probably not the best solution (it takes too long time for the heat to melt the solder). better to (without dedicated reworking station) : * made a big fresh solder blob on one...
  6. OLIVE2222

    Reducing Energy consumption in Data Center

    Hi ankurparekh65, The generics scenario's for computer chips energy consumption can be: -Reducing the chips supply voltage to allow same processing capabilities with less power or more processing capabilities with the same power (at chip manufacturer level) -Reducing the clock(s)...
  7. OLIVE2222

    EAGLE CAD board through-hole design issue?

    Hi, Modifying the production files will certainly work but it's a bad practice. The next time the PCB is edited you can forget to apply the trick :( Olivier
  8. OLIVE2222

    EAGLE CAD board through-hole design issue?

    Hi rigers, I am not an Eagle CAD user however the think to do is to place a so called "internal cutout" or similar. still need to find it in the menu's. Olivier
  9. OLIVE2222

    conductivity check need help

    daddles, The way I see the setup is not to measure 0.01 degrees to control the 0.1. I almost don't care about the exact water temperature. I do it indirectly. So the exact water tempature will be "the temperature needed to have 25° in the fluid". Steps are: * Heat up the water...
  10. OLIVE2222

    conductivity check need help

    The picture make sense, basically the "cold box" way. They best bed is indeed that the cool down will be slow enough to ensure 20 sec of stability. So a regulation "by is own". Heating element can maybe be split to limit convection, by adjusting water volume and/or "venting" at the top...
  11. OLIVE2222

    conductivity check need help

    0.1°C seems achievable: http://www.thermistor.com/directemp.php maybe you can log your fluid warmed above 25° at room temperature to evaluate how he behave when cooling. Then you can log your fluid from 20° and slowly warm it to evaluate how he behave when heating. The idea is to find if...
  12. OLIVE2222

    Something better than a potential divider

    Hi Rob, The 65V of your stirling engine are somewhat to high to find standard low components count solutions. However you can made a low current regulator in the 12-24 volts range with a zener an an emitter follower transistor to supply a dc/dc controller(like the MC33063) On this controller...
  13. OLIVE2222

    When is a fan needed to cool a FET?

    Hi, Choosing a fet with the lower possible Rds is important too, each milliohm matter. Have also a look on datasheet Rds versus Vgs. Olivier
  14. OLIVE2222

    DJ 6 channel Mixer (4 mono + 2 Stereo)

    Hi Chris, This is a cool project. As all channels are similar I suggest to build the mixer on modular way with 7 input boards and one summing/output board. Also maybe the inputs board can be all the same with a mic/aux switch to make it more versatile. About the echo do you have any...
  15. OLIVE2222

    Rat Zapper

    Hi Tezza1, I forget you already have a rat zapper, so just keep all the "mechanical" stuff and the plates as it. Olivier
  16. OLIVE2222

    SN75157

    Hi sweetie430, Here under an application note including noise margin aspect: http://www.analog.com/static/imported-files/application_notes/AN-960.pdf To be noted that it's better to go for an industry standard SN75176 pinout, if compatible with your design. MANY compatibles and improved...
  17. OLIVE2222

    DC 12v Wiper Motor H-Bridge

    Hi Kyle, Hou can find many parts at mouser Australia: http://au.mouser.com/ Yes simplest circuits tend to be more reliable and I am not an over engineering addict, however a small protection circuit seems OK to me. If you go for a marketed product you can have a look on this...
  18. OLIVE2222

    Power supply delema, help!

    Hi nick87453, Well you need to bought a 6 volts / 1 amp transformer and to do some wiring. By the way are you sure this is ac powered? Olivier
  19. OLIVE2222

    Replacement ac power supply for alesis multimix 8

    Hi rob, The ebay item picture don' t match the description. looks to be 2x6 volts 100mA only, better to ask the seller before buy. Because it's a heavy part it's always expensive to ship! Do you have access to any local shop? you can also get 2 separate 18 volts transformer which can be...
  20. OLIVE2222

    PIC16F627

    A clone is also available for 21$ http://www.ebay.com/itm/Clone-Microchip-Development-Programmer-Mini-PICKIT-2-/350461709565?pt=AU_B_I_Electrical_Test_Equipment&hash=item5199254cfd already bought stuff from sure electronics, they are reliable guys. Olivier
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