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  1. flippineck

    Component identify

    Those yellow capacitors across the middle contact.. the board designer seems to have been careful to include a lot of slots in the PCB between the tracks there.. is that significant in understanding the working of the circuit?
  2. flippineck

    Soldering temperature indicator

    Middle of the SMT IC, wherever it's going to be most sensitive to heat damage. Probably right in the centre? Have ordered a "Max Measure IT-01" IR thermometer gun to try it out. It claims a 500msec response time. No specific mention whether it supports continuous monitoring, none of the Ebay...
  3. flippineck

    Soldering temperature indicator

    Some of them have a laser dot thing, just to help you aim it
  4. flippineck

    Soldering temperature indicator

    Good idea, looked at a few on Ebay, one thing I'm unclear on is whether it's possible to get a constantly changing reading from them or whether you get a discrete reading per trigger pull. Or, if they all differ in this respect. I've visions of one set up in a lab stand with it's trigger held...
  5. flippineck

    Component identify

    Not much help I suppose but, its mentioned by others here https://www-elektroda-pl.translate.goog/rtvforum/topic3122163.html?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB&_x_tr_pto=nui Seems to be something to do with 'Fellowes patented SafeSense ® technology' which stops the shredder if hands get...
  6. flippineck

    Soldering temperature indicator

    On my fishtank, I have a thin plastic strip on the glass that changes colour in response to temperature. I wondered if there is something similar to assist with soldering? Thinking of soldering SMT IC's with a hot air gun. Just something additional, for comfort, to confirm once you've melted...
  7. flippineck

    Purchasing an EEPROM programmer

    Second link above shows two very useful WSON-8 sockets mounted on a small PCB. Can those discrete sockets be obtained fresh / new / unsoldered / on their own from anywhere? I'd sure find those useful. I've looked in all the usual places I tend to try (ebay, cpc, rs components) but reasonably...
  8. flippineck

    Semiconductors and heat

    The first time I ever attempted an electronic construction project would have been around 1979 as a young lad. It was a beat frequency oscillator metal detector. The guy next door who was an electronics egghead decided to show me how to do it over the garden fence. My first several attempts...
  9. flippineck

    Purchasing an EEPROM programmer

    I have a chip I would like to try reading and writing to as a learning excercise: W25Q128FVPQ (WSON package) https://pdf1.alldatasheet.com/datasheet-pdf/view/506494/WINBOND/W25Q128FV.html I'd like to purchase an EEPROM flash programmer for the purpose. It would be nice if the programmer I buy...
  10. flippineck

    kitchen gadgets buy

    I'll tell her you said that!
  11. flippineck

    Need help repairing Microwave oven

    Is there a potential danger from stored charge even after the unit has been unplugged for a while?
  12. flippineck

    Anyone know of a good, very basic, cheap electronic sketch pad?

    Kolourpaint installed easily from my existing sources using the Muon package manager. That's another good solution, thanks :-)
  13. flippineck

    Anyone know of a good, very basic, cheap electronic sketch pad?

    Wow, that program's a keeper :-) Thanks for that. It's more complex than what I had in mind, but I was able to get it to produce some worthwhile output in half an hour of playing with it. It's going to be worth spending the time to learn how to use it properly.
  14. flippineck

    Anyone know of a good, very basic, cheap electronic sketch pad?

    Thanks. It's listed in the package manager on my system but won't download at the moment. Soon as I've got the download issue fixed I'll give it a try :-)
  15. flippineck

    Single 3.3V Inverter

    Sorry, I know, I really must find a better way of doing diagrams
  16. flippineck

    Anyone know of a good, very basic, cheap electronic sketch pad?

    They say a picture paints a thousand words. Often find I'm trying to describe something in words where a simple circuit diagram would be far preferable. Finding it hard though, to effortlessly come up with a quick diagram on my PC (Linux OS) when the need arises. There's a million solutions...
  17. flippineck

    Single 3.3V Inverter

    Sorry to double post, too late to edit. Just occurred to me I could just replace the relay coil with the 4k7 resistor, connect the 10k resistor from the J3Y (existing NPN on the board) collector to ground, and take the 3.3V / 0V signal straight off the J3Y's collector. It should then be...
  18. flippineck

    Can this be repaired by a complete novice please? Basic circuit repair?

    Looking forward to updates
  19. flippineck

    Single 3.3V Inverter

    As the setup stands (it's a timer board from China), there's no actual 3.3V rail as such. The board provides a good stable 5.0V from a small buck chip. At the moment I have it connected to a 9V pp3 battery, in the application I have planned, it'll be 4 x D cells giving 6V. As supplied the board...
  20. flippineck

    Single 3.3V Inverter

    Looking for a single channel inverter that will take as a square wave input, a 0V level which rises to 3.3V for one second and then drops back to 0V, and convert it to a 3.3V square wave output which falls from an initial constant 3.3V, to 0V for one second before rising back to 3.3V The input...
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