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  1. kellys_eye

    WS2811B addressable RGB LED to 12V RGB outputs converter

    5V connected to the molex is fine. Fusing is optional since most PSU's have short-circuit protection anyway (ever seen a fuse on a mobo?) Laptops, yeah..... can;t sasy I've seen one on a PC mobo though (anyone care to correct me?). Line (trace) width - dodgy..... you have to consider the...
  2. kellys_eye

    Solar, battery inverter outputs

    Yes
  3. kellys_eye

    Total N00b question about a plugpack

    Finding an AC output adapter isn't very easy at all. You may find it simpler to purchase a small transformer and mount it in a box. Here's a picture of the ONE AND ONLY adapter with an AC output that I spotted on eBay.... the key part to note is the "9V~" bit. Far too many adapters are stated...
  4. kellys_eye

    Total N00b question about a plugpack

    No, that's a DC (unregulated) output. The 'bar' with the 'dotted line' under is the give away.
  5. kellys_eye

    Solar, battery inverter outputs

    All brands are good - just source them from a reliable supplier (cheap Chinese knock-offs may be fine but you get a greater level of security buying from the big names). If you (and I'm sure you do) have power at the well/pump then use the telco wiring to send a DC supply to a relay at the...
  6. kellys_eye

    Electrolytic capacitor questions (reversed polarity)

    The only reliable way to test them would be with an ESR meter (equivalent series resistance) to check for internal damage. Experience proves that the capacitors DON'T survive the reverse connection though. Remove (or disconnect) the suspect capacitors and drop in any reasonable value you have...
  7. kellys_eye

    Car battery jumpstart gadgets

    Despite the appeal of super capacitors I still wonder why some people try to sideline the good old lead-acid battery. Considering most people purchase a car with a lead-acid battery installed and run it for years - sometimes decades - without even bothering to top them up(!) - the fact that...
  8. kellys_eye

    Total N00b question about a plugpack

    Well despite your link only being to page 1 of the schematic (the PSU part is on page 5) I did find it... bad news though. The synth uses a split-rail 9V supply internally and this is derived either from batteries or through that AC wall wart you have but there's no way the split-rail can be...
  9. kellys_eye

    Dual NR 5 DAB Radio. Leak on circuit/power board...

    Hmmmm - the gungy stuff reminds me of the type of gluey stuff they use to hold stuff that's sensitive to vibration - potentially hidden under the metal can-type enclose nearby. It certainly doesn't look like residue from any blown component that I've ever seen 'blown'.... The picture I've...
  10. kellys_eye

    Total N00b question about a plugpack

    You won't get a 'less clunky' version - it's a 9V AC output which will have to be derived from a 'clunky' old mains transformer even if it's a 120V AC input version. Such wall warts should be available but won't be too common. What you could do is check out the input circuitry of the...
  11. kellys_eye

    Repairing an ECIG MOD!

    Never seen any data or pictures of the insides of e-cig devices so you're pretty much on your own here! The area in the pic seems to be where that wire has pulled loose from - I don't like the look of the circuit board under it (looks like it has 'burned' its way off the board...) and, as you...
  12. kellys_eye

    WS2811B addressable RGB LED to 12V RGB outputs converter

    Bypass capacitors are essential. 100nF. Can be mounted on the reverse of the board if required but should always be right adjacent to the power pin. 33Ω recommended - limits spikes (always present in data signals) so use it. The divider resistor IS required - it is not part of the RGB device...
  13. kellys_eye

    Panasonic diode needed

    It's a 'simple' rectifier with a rating of 500V and 3A. Use your usual component suppler parametric search facility and enter those details and you'll find loads of comparable diodes. The 1N5405 is a common example...
  14. kellys_eye

    Solar, battery inverter outputs

    If you use a reliable supplier for your SSR (and one that is correctly rated) there's no reason why it should fail - besides, there's nothing stopping a relay from failing 'short' (welded contacts) either. Your reasoning behind not using an SSR aren't really valid. For an 80A DC switched load...
  15. kellys_eye

    siemens 3tk2824-2cb30 options

    Here's the data sheet for the 3tk2824-1cb30...
  16. kellys_eye

    Dual NR 5 DAB Radio. Leak on circuit/power board...

    How about a picture of the whole equipment? The make/model is more likely to be on the casing than on the pcb. And if it's not then someone on here may just recognise the equipment from experience....
  17. kellys_eye

    Solar, battery inverter outputs

    What do you want to control? You can use SSRs (solid state relay) which would connect directly and control many 10's of amps on the AC side.
  18. kellys_eye

    Identifying transistor's PINs (Emitter and Collector)

    I always recommend the purchase of this multi-tester: https://www.ebay.co.uk/itm/LCD-Component-Transistor-Tester-Capacitor-Diode-Triode-MOS-PNP-NPN-LCR-New-Fein/272845681743?epid=2241010246&hash=item3f86deb44f:g:tMMAAOSw1LRZuJDF whilst not 100% accurate (see Dave @ EEVBlog for a review) it's...
  19. kellys_eye

    Sensor to detect force from an angle

    Try a multi-axis sensor (accelerometer) that will give all the data you need. https://www.sparkfun.com/categories/163
  20. kellys_eye

    Ceramic Heating Element

    Have you researched current technology and the principles involved? Check out this site and see what's currently available and how they work, then take another look at your design and see if it is still valid...
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