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  1. kellys_eye

    Ethics of buying electronic modules from Chinese sites?

    You (sadly) illustrate one of the reasons why the planet is in such strife right now. You can't, won't or refuse to either look at things from different angles, do any research or make critical decisions yourself. You seem to rely entirely on the media and Government for your input - a massive...
  2. kellys_eye

    Bernina 802 motor capacitor replacement

    Closest I can find - you want original, you have to pay the price...
  3. kellys_eye

    Dewalt DC012 radio - No sound

    Issues such as bulging are generally associated with switched-mode power supplies (caused by HF ripple) and hardly ever with 'analogue' DC versions of equipment unless it is REALLY old.
  4. kellys_eye

    General question about 12 volt inverter hookup in vehicle

    I know you have a 12V inverter but this is the reason why 24V inverters were created. Half the current for the cables! It would be far easier to located the inverter IN the engine compartment and arrange proper cooling for it and take the AC to where it's needed. For heavy current...
  5. kellys_eye

    Ethics of buying electronic modules from Chinese sites?

    Unless you can refute anything I posted I'm not going to do your research for you. Your head-in-the-sand attitude is typical of many who blindly accept the narrative of 'official' information sources. As someone once said, "the truth is out there" - all you have to do is look for it. But...
  6. kellys_eye

    Ethics of buying electronic modules from Chinese sites?

    It's chillie up here!
  7. kellys_eye

    Ethics of buying electronic modules from Chinese sites?

    I presume you're referring to the Putin bit? Since the end of WW2 the Russian 'border' (i.e. buffer zone) has been pushed back, further and further towards the Russian homeland and strategic OFFENSIVE deterrents have been situated all along the borders by Western (i.e.USA) forces. Promises of...
  8. kellys_eye

    I grow tomatoes really well, now I'm trying my hand at automating the entire process

    He's right although his solution isn't quite right. The snubber I referred to is the answer. You fit ONE ACROSS EACH solenoid coil. Here's a typical component: https://uk.rs-online.com/web/p/rc-network-capacitors/1726734
  9. kellys_eye

    Ethics of buying electronic modules from Chinese sites?

    This is precisely what the USA has done with the Dollar and precisely why the likes of Putin, Xi and the rest of the BRICS want to see a DIFFERENT world order based on being able to trade in whatever currency you want. As to the 'individuals responsibility to prevent....' I suspect the American...
  10. kellys_eye

    I grow tomatoes really well, now I'm trying my hand at automating the entire process

    What are the specs of the relays and their contacts? Solenoid valves are very inductive therefore create large sparks across switch and relay contacts - some kind of spark suppression is usually used to alleviate this. The device (component) you require is called a SNUBBER.
  11. kellys_eye

    Vintage Gremar Female BNC Connector Identification?

    That is also a truism.
  12. kellys_eye

    Ethics of buying electronic modules from Chinese sites?

    To worry about what others are doing and to ignore your own capabilities in preventing that are two different things. I couldn't care less what the Chinese are doing but I care a LOT about our own Governments non-action or indeed, their collusion in our own downfall as a result of it. Heck...
  13. kellys_eye

    Fried PSU for 12v cb radio base station conversion

    The transformer secondary voltage seems rather high for a 12V PSU as, at a draw of 6A, you will need to dissipate around 75W of heat in the regulating transistor. Perfectly feasible of course but depends on the efficiency of your heatsink. The most basic 12V regulator at 10A can be made using...
  14. kellys_eye

    repairing electric fireplace

    The device (square) with the yellow tape around is the transformer associated with the switching function of the system that generates the actual control voltages for the unit. There is a 7-pin IC (marked IC1)under it that is a potential culprit but you should test for the +5V signal at the...
  15. kellys_eye

    Automatic electric bell using wifi

    Homework? Albeit outside the normal specs we consider homework........ Either way the ubiquitous Arduino or ESP32 will suffice. The ESP32 range can be had very cheaply and with onboard wifi, sensors or 'whatever' that will easily achieve your task. The 'rule' for using only a microprocessor...
  16. kellys_eye

    repairing electric fireplace

    The NTC sensor is a diode (or zener) and can be tested using your diode function on a test meter. It's probably just fine. That said, for a 'simple' fire it has an awful lot of electronics and suspiciously a potential SMPS circuit which is notorious for capacitor failure. Post close up...
  17. kellys_eye

    Ethics of buying electronic modules from Chinese sites?

    Rather naive of you! Since 'we' designed it 'we' know its limitations and vulnerabilities therefore the system, as it stands, is effectively useless to be used against us. Those 'tanks' are otherwise known as Just Stop Oil protesters.
  18. kellys_eye

    New project need assistance

    The best CNC's don't use stepper motors but use SERVO motors that are fitted with feedback (slotted opto) mechanisms to ensure no step-loss during movement. A 'single' missed step in a stepper controlled process will create an error that is carried throughout that process and will amplify if...
  19. kellys_eye

    Fried PSU for 12v cb radio base station conversion

    Use a transistor tester or Google how to use your testmeter diode check function to test the individual junctions.
  20. kellys_eye

    Vintage Gremar Female BNC Connector Identification?

    75 ohm connectors typically have TEFLON (soft) as the insulation whereas 50 ohm use DELRIN (hard).
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