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  1. flippineck

    Continuity or infinity on a starter?

    Bear in mind that some starters have an integral solenoid - in this case if the integral solenoid isn't energised, the resistance between the big fat power terminal and the case of the starter, should be very high? If it doesn't contain a solenoid, some continuity isn't bad, you've got a path...
  2. flippineck

    Ebay DC - DC boost converter

    Thanks Steve. Had a chance now to dig around on ebay & turns out there are some similar devices to the first one I got, which specifically list 'LED driver' in the suggested applications and seem to have output current control - and happily some of these seem to be even cheaper than the one I...
  3. flippineck

    Ebay DC - DC boost converter

    Is there a simple, cheap 2 wire series component that could limit current? Like a fuse, except that it wouldn't 'blow' but simply hold the current and prevent it from rising above some predetermined limit? I was just thinking, if I ordered some more LEDs maybe I could protect them and the...
  4. flippineck

    Ebay DC - DC boost converter

    a follow-on question... I just rigged up this unit to a 12v battery (big lead acid leisure type) on the input, and a 3 amp, 100 watt 32-34 volt led chip on the output. all worked absolutely fine until I began being silly and twiddling the voltage adjust on the regulator, blindly, with the led...
  5. flippineck

    Is this a micro microphone Circuit??

    I did my own independent googling on the board ID and came up with exactly the same suspicion as KJ6EAD. I too would venture someone might be fooling with your (or a past / other occupant of the desk's) head..
  6. flippineck

    Ebay DC - DC boost converter

    I bought a dinky little DC to DC boost converter on ebay. It has a twin screw terminal input block, and a twin screw terminal output block. The listing says it will accept a DC input of something like 10 to 60 VDC, and output anything from 12 to 80 VDC. On the board, there are two trim pots...
  7. flippineck

    Soldering Aluminium Sheet 3mm Thick

    This guy makes a nice job of it but, he's using more of an open flame than I'd be comfy with Shows it's possible though bit more info http://www.superiorflux.com/aluminum_soldering_flux.html http://www.superiorflux.com/aluminum_flux_cored_wire.html I'm kinda intrigued about the arctic...
  8. flippineck

    Soldering Aluminium Sheet 3mm Thick

    Soldering Aluminium Sheet 3mm Thick Grade/Spec: 1050A H14 - a commercial purity alloy giving excellent corrosion resistance. It is Ideal for welding, bending and moulding. It is also suitable for painting. I have a sheet of this aluminium sheet, roughly 50cm x 40cm I want to try soldering one...
  9. flippineck

    Car Battery Bounce Eliminator

    Looks good! Seems like just the sort of thing needed but am bleary eyed, just woke up with a rampaging and uncooperative 4 year old to take to nursery here, so I'll come back and have a real good mental munch on it later. Thanks :-)
  10. flippineck

    Car Battery Bounce Eliminator

    Yes I should be able to do that. The device would only have to handle the same level of current that the car would draw when stood still with the ignition key out. No need to handle the hundreds of amps needed for starting, heated windows etc since, the idea would be to remove the device...
  11. flippineck

    Car Battery Bounce Eliminator

    I'm just talking about the normal 'standby' stuff that most modern cars have that is powered even when the key is removed from the ignition. I'm not sure of the exact figures and details but there's a baseline draw of a few tens? hundreds? of milliamps taken by the gubbins that listens for your...
  12. flippineck

    Car Battery Bounce Eliminator

    Problem I have is this: I connect the 12V lead acid battery in my car by bolting on the terminal. I think the manual says always connect the negative terminal last. When I do, there are loads of sparks and sometimes even the alarm goes off. I imagine the main supply rails all over the car...
  13. flippineck

    Solar Panel Configurator

    Thanks. I've been doing some reading & understood sufficient to know I probably need a ready-made MPPT controller which features a built-in boost converter as part of the design. Unfortunately most of the cheap far-eastern stuff on ebay falls a bit short on reliable in-depth technical info...
  14. flippineck

    Solar Panel Configurator

    Would this be suitable? www.ebay.co.uk/itm/MPPT-10A-Solar-Controller-Regulator-12V-24V-100W-240W-10-30-more-Power-Boost-/171104980485 My only worry would be that sometimes, I'm likely to be trying to draw pretty heavy currents. I have a 2000 Watt / 4000 Watt peak, pure sine wave inverter which...
  15. flippineck

    Solar Panel Configurator

    No I don't think it does MPPT, at least it doesn't say so. I looked briefly into MPPT & just about understood what was going on, seems to be something about automatically adjusting the load on the panels to try and keep them operating at the 'knee' of their IV curve? I'll go read up some more...
  16. flippineck

    Solar Panel Configurator

    Thanks for your reply Steve. Yes I had wondered about what might happen near the switching point. Buck converters and boost converters - these are animals I have not yet met, I will go and do some reading. If anyone can point me further in the right direction for these, that would be handy...
  17. flippineck

    Solar Panel Configurator

    attached: rough schematic of my idea so far (no doubt not a workable circuit)
  18. flippineck

    Solar Panel Configurator

    I have a solar storage setup composed of six 80 watt panels, a cheap ebay regulator, and a 12V leisure battery hooked up to a 12VDC--->240VAC inverter. I've connected all six panels together in parralel. The voltage output from the array varies from near zero (16 millivolts) in the dead of...
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