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  1. kellys_eye

    Tin plating

    I have a bottle of tin plating solution (bought as 'powder' that you simply mix with water) that produces fairly good results - tin depth proportional to length of time in the solution. I checked RS Components for the stuff only to find it was £125 a bottle!!!!!! but also found this stuff a lot...
  2. kellys_eye

    Photo sensor controlled outlet (turns on or off at daylight or nightime)

    I'd put a great big label on the box warning of 'SWAPPED NEUTRALS (or lines)' to stop anyone using the box for any other purpose (and cover yourself for litigation if someone did).
  3. kellys_eye

    Zero ohm resistors.

    Better than 10% of nothing!
  4. kellys_eye

    Photo sensor controlled outlet (turns on or off at daylight or nightime)

    Swapping the red/black wires is, as noted, the way to go. Also, how do the motors know when to stop? I presume that they incorporate their own end-stop switches?
  5. kellys_eye

    PCB design problem

    Use a more modern design/chip. Where specific device designs don't exist for the software you are using it is normal practise to create your own using the software parts creation tools - assuming yours incorporates such (most modern programs do). You could just place a 16-pin DIP device and...
  6. kellys_eye

    Zero ohm resistors.

    Wow! That's a real hunk'a'metal! Must say I'm surprised to see that as the insides - can't really see the point behind them making it so 'robust'.
  7. kellys_eye

    Zero ohm resistors.

    I very much doubt that the 0Ω resistor you show is simply 24 AWG 'all the way through' - it's very likely that the body is an actual resistor with a metal film deposition to give 0Ω and will be rated according to the package dissipation (1/4 watt? 1/2 watt?) that the resistor is normally...
  8. kellys_eye

    Voltage regulator problem !!

    Only if you want to destroy any connected equipment....... If you have (or can find) the schematic you need to look for the part of the circuitry that does the comparison check (with whatever it uses for a reference value) to see if anything has been 'knocked' out of tolerance. The (one of...
  9. kellys_eye

    Honeywell HD6 PTZ Camera mount control options

    The site I link to above shows the protocols needed to operate the PTZ - it's a serial signal with various 'commands' that may be specific to the manufacturer (I'm not familiar with the CCTV camera you show) so unless your 'code' matches what the manufacturer specifies then nothing will happen...
  10. kellys_eye

    Amplifier

    When you bias the transistor for a specific Rc and CHANGE Rc, what do you think you may need to do?
  11. kellys_eye

    Technics SA-818 FM Muting Problem

    Full NEC catalog showing the IC on page 186 onwards https://www.mazdabg.com/ftp-uploads/NEC/Book/1983_NEC_Integrated_Circuits_for_Consumer_Use.pdf I'd be looking at trimming T101/T102
  12. kellys_eye

    Honeywell HD6 PTZ Camera mount control options

    If you have the protocols and the interface the only reason it won't work is that one or both are 'wrong'. Check out sites like this: https://www.commfront.com/pages/pelco-d-protocol-tutorial#1 and use their interface programs to see if there's a specific issue with your camera. If you can...
  13. kellys_eye

    Got any ideas for using an old fridge?

    Turns out we're going to be using it to (temporarily) keep our pond fish in while we rework the existing pond (make it deeper). Lid removed of course - and power cord cut too!
  14. kellys_eye

    Zero ohm resistors.

    It's an interesting observation - not one in my experience but, then again, I'm not doing what you used to do! - but using parts for 'unintended purposes' is good thinking so kudos to whoever dreamt up the idea. I'll bear it mind for future self-notification should I come across anything that...
  15. kellys_eye

    Zero ohm resistors.

    ... to be replaced with..what?
  16. kellys_eye

    MEDTRONIC 5330 Pulse Generator

    It has a pulse output up to 180V so with the appropriate 'scope (having an input voltage capability to meet the demand) of course you can 'look' at the signal.
  17. kellys_eye

    Switching power supply emission the electromagnetic waves

    I find it easier to bluetooth the radio from a different location or receive it via internet anyway..... The cost/effort of trying to reduce the RFI from a PC simply isn't worth it.
  18. kellys_eye

    Zero ohm resistors.

    Here's a datasheet for Vishay's 0Ω SMD resistor range. Note the fusible values range from 0.5A to 6.3A https://www.vishay.com/docs/31017/rcwp99.pdf Note also that although they are 'zero ohms' they actually have a value of 20 - 50 milli ohms hence a dissipation rating.
  19. kellys_eye

    Zero ohm resistors.

    Zero ohm resistors are standard sized to allow use in the same placement machinery as ordinary components. By using a wire link you have to have a specific 'arm' to place those links and also, in many cases, thru-holes don't exist to put them into anyway. In high density boards a thru-hole is...
  20. kellys_eye

    ebike with speaker amp as a watt amperage is it possible

    Why? Because we can only help you if we can understand what it is you want. Your original post is (effectively) meaningless as we are unable to determine what you're trying to describe! So far I get: 1. Your bike has a battery of 36V running a 250W motor 2. You want to reduce the battery...
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