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  1. kellys_eye

    Salvaged components

    I'd be surprised if anyone built something entirely from salvaged parts but I've used them in many, many different projects over the years. Test equipment, transmitters, receivers, repaired TV's etc.
  2. kellys_eye

    Inverters connected

    I presume 'paralleled' (I mean, why would anyone wire them in series???) You can, but only under strict synchronising rules so if your inverter(s) don't have this facility then the task becomes extremely difficult and potentially very expensive. The easier way would be to to switch between the...
  3. kellys_eye

    Lg tv stuck on camport saying disconnect front av jacks, nothing is plugged in older tv 2006 model

    Do you have kids? If the set has 'holes' and you have kids then the holes have 'things' in them.....
  4. kellys_eye

    Schematics fpr Amana RR-10A Microwave oven

    There are quite a few 'exploded' diagrams of the innards of that microwave and, from what I can tell, there's nothing particularly complex about it. They are all much the same - a power supply, various interlocks, a timer and a magnetron. Most microwave failures relate to needing a replacement...
  5. kellys_eye

    Antique Automotive Resistors

    Can we be party to this diagram or should we keep guessing too? Post the diagram.....??
  6. kellys_eye

    Electronic components - need suggestion

    What product do you want to manufacture? Where in the UK do you live?
  7. kellys_eye

    Replacing Large PCB Pin-Headers/Eurocard?

    Yorkshire man actually :p
  8. kellys_eye

    Power supply problem

    OK, I missed that bit about the light flashing (you said it was 'bright, almost flashing') - that's not right - unless the power supply is only intended to deliver 2A (certainly not enough to power the PC board). Can you get the device numbers on ALL the five on the heatsink?
  9. kellys_eye

    RGB problem

    The copper isn't too big (as far as I can tell in your video - post a close-up picture of the wire ends). You seem to be pushing the INSULATION into the end of that plug - you did it with the R, G and B wires - and the insulation is holding the actual wire cores in the socket. The 'black'...
  10. kellys_eye

    Dither for PWM circuit driving a proportional solenoid

    If I understand you correctly you want to modulate a PWM signal with another? You could do this using a logic gate (AND two PWM signals) or do it in software since you're using such low frequencies by feeding it back into a couple of input ports and 'doing the business'.
  11. kellys_eye

    Dither for PWM circuit driving a proportional solenoid

    says who? My understanding is that there are limits to what you can use but, between those limits, the choice is down to various register settings.
  12. kellys_eye

    What is this?

    Based on that schematic diagram the actual 8004 device you have is really an MC141540 - the data sheet http://pdf1.alldatasheet.com/datasheet-pdf/view/898521/MOTOROLA/MC141540.html corresponds to the pinout in the schematic Edd shows (nice find BTW <thumbs up>) so all is revealed! It's an...
  13. kellys_eye

    RGB problem

    It's not meant to. The stripped back part (copper wire) is the bit that goes in - ideally those bare wires would be fitted with the matching plug - so strip some insulation off the wire, fold/twist the copper wire around itself and ...jam it in there......! Alternatively, cut the connector off...
  14. kellys_eye

    Power supply problem

    The 4 watt side of the bulb only loads the supply to some 300mA (0.3A) whilst any problems may only occur at the higher current draw end. Even the 21W part of the bulb - guaranteed to be brighter so no indication to be assumed - only loads to just under 2A. That 'should' be enough to prove the...
  15. kellys_eye

    Replacing Large PCB Pin-Headers/Eurocard?

    Absolutely! But the key is to have good liquid flux - I use RMA (rosin mildly activated) and clean up afterwards with IPA (isopropylalcohol) BOTH of which items a decent workshop should always have a supply of. Although the 'good' solder wicks are supposed to be flux impregnated I find they...
  16. kellys_eye

    RF Circuit Battery Efficiency

    There are basic 3.3V modules available on eBay http://www.ebay.co.uk/itm/DC-5V-to-3-3V-Step-Down-Power-Supply-Module-UK-SELLER-B46-/121727191447?hash=item1c57818997:g:oREAAOSw3ydVqeff OK, they are rated at 5V input but a series diode from your 6V supply will fix that.
  17. kellys_eye

    Advice before buying an Inverter

    The inverter is rated at 300W which equates to a minimum of 25A (and with losses this would actually be around 30A but with potential overload conditions even 50A!) so don't scrimp on the cable used. Personally I'd fit 6mm c.s.a. as a minimum and still fuse it at 30A.
  18. kellys_eye

    Power supply problem

    Yeah, 85C capacitors on boards that derive supplies by switched-mode means is poor practise and you'd benefit from changing them. Interestingly, and pleasingly, the pcb actually shows what those 7 regulators actually supply power too! Left-to-right you have: 7805, 7805, LM317, 7805, 7805...
  19. kellys_eye

    Advice before buying an Inverter

    The 5% volt drop is a target to meet as a minimum requirement for cable size however, more importantly, the mechanical and physical security of the cabling is paramount. Such high current draw will easily result in fire if not properly done so the correct cable - as in cable intended for...
  20. kellys_eye

    RGB problem

    You tell us! MAKE the wire(s) go in the hole properly and see what happens. Until the wires ARE properly inserted there's no point in assuming there's any other fault.
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