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  1. kellys_eye

    UM66 is not giving full tone

    You're using a bell push on the MAINS side of the transformer? But how do you generate the tone? Where is the tone 'input' to the circuit? Post (or link to) the complete schematic - all we have here is the amplifier part.
  2. kellys_eye

    UM66 is not giving full tone

    Where is the bell push? Where does the tone come from?
  3. kellys_eye

    Fluke Scopemeter 123 display dim

    Fault tracing the Fluke should be relatively easy given the full schematic available via the document I linked to. The display is definitely compromised - spares seem to be impossible to source unless you want to pay exorbitant prices so it should be considered 'beyond economic repair' unless...
  4. kellys_eye

    Clamp on analog meter

    Show the rear of the circuit board. It looks as if that meter has seen some serious overloading in its life. Check that the meter (dial) itself still works as without it the meter is useless and the indications of an overload/blown meter are all there. Use a 1.5V battery and series resistor...
  5. kellys_eye

    What is this ic for?

    Just because a device is 'recommended' to be used for graphics there is no reason you can't use it anywhere basic memory is required. It may have been selected for its memory content, its physical size or simply because the designer had a pile of them he wanted rid of!
  6. kellys_eye

    Boxes. Cases. I need simple coverings for my projects! What do you use?

    Getting a suitable case for your projects can be difficult. A lot depends on how you feel about the final appearance. Plastic (and metal) housings are available in many shapes/sizes but you can guarantee there'll never be one that fits the bill the way you want it to! People 'find' their own...
  7. kellys_eye

    Light show and Phone power questions

    ISTR the POST (plain old telephone system) uses a 50V (or thereabouts) supply on the line. It is AC (for ringing) and DC for conversing. If the local switchboard (exchange) went down then it should normally have it's own battery-backed supply to maintain that voltage.
  8. kellys_eye

    How to use a3983slpt

    Purchase a version of it already mounted on a DIP PCB (with the required external components etc). It might not even be an A3983 (which is 'obsolete') but you can get various stepper versions that offer the same (or better) performance such as the A4983 - and as a 'plus' you will usually find...
  9. kellys_eye

    Fluke Scopemeter 123 display dim

    Disappointing situation for a Fluke..... do you know what the size/resolution is? Any identifying details that might help locate a replacement? Found an earlier thread that reveals some details: https://www.electronicspoint.com/threads/fluke-123-replacement-lcd.187922/ <edit> hmmmm.... there...
  10. kellys_eye

    Talking to my phone

    The internet surfers wet dream-cum true......
  11. kellys_eye

    Talking to my phone

    But on a more serious note - yes, for sure there has been a considerable improvement in text-to-speech ability. The last time I tried it was back in the 90's - laughable would be an understatement. However, if it can convert your speech to text with such accuracy it make me wonder if it can...
  12. kellys_eye

    Talking to my phone

    Try the following... "I should try to get a life..." :D:p
  13. kellys_eye

    Old capacitor ID help

    yup, I've heard that one too.
  14. kellys_eye

    Electric ICE Exhaust Cut-out... why? and how?

    Hybrid cars are the way forward. All-electric is far too soon (battery technology) and as for autonomous..... sure - big cities. But it's either an all-or-nothing situation. I don't think a mix of technologies driving in the same space would work without serious legal issues. Are we to...
  15. kellys_eye

    Old capacitor ID help

    A trip down memory lane! Reminding me that when ever you tried to bend the leads to fit holes, the ends of the capacitor broke off! What were they nicknamed??? Was it 'pelican' capacitors (for their coloured dip effect?)
  16. kellys_eye

    Electric ICE Exhaust Cut-out... why? and how?

    Jeremy Clarkson: I tend to agree with him.
  17. kellys_eye

    RCA out to 1/8" headphones on Vizio smart TV - clipping/distortion?

    The red/white audio OUT signal isn't powerful enough to drive headphones directly. You'll need an amplifier. Does the set not have a 3.5mm audio out socket? If not then as mentioned, an external amplifier should be used.
  18. kellys_eye

    Simple Metal Detector Circuit Keeps Beeping - Help

    Looking at the breadboard layout I can see the white wire link (from one of the coil wires) isn't connected to anything....... similarly, if the copper wire DID have an enamel coating there would be signs of it where the wires are soldered to it - I can't see anything.
  19. kellys_eye

    Electric ICE Exhaust Cut-out... why? and how?

    you're not referring to Tesla's I presume.....
  20. kellys_eye

    HT9032D

    If Dout is your serial data then you can connect it to whatever pin on the Arduino you care to configure for serial data input. Whether or not that pin requires a pull-up or not depends on the devices themselves (internal pull up resistor?).
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