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  1. Martaine2005

    3 Pin Relay Wiring?

    Please don’t play with mains power until you understand it and RESPECT it.
  2. Martaine2005

    3 Pin Relay Wiring?

    And if that day never comes, at least you had one. Just in case:)
  3. Martaine2005

    Fried PSU for 12v cb radio base station conversion

    Clearly there is a cracked diode. But what does your fault finding say?. Is the output transistor shorted? Is the diode shorted?. It’s a pretty simple power supply so you should get it working again. Edit: is this a typical 13.8V linear supply?.
  4. Martaine2005

    I2C FUNCTIONS FOR PCF8583 RTC IN ATMEL 89S52

    Yes
  5. Martaine2005

    3 Pin Relay Wiring?

    Pardon the pun;)
  6. Martaine2005

    More than one power supply from one power supply with caps

    I have no idea what you’re talking about Ratstar.
  7. Martaine2005

    More than one power supply from one power supply with caps

    Que? Ratstar.
  8. Martaine2005

    Ethics of buying electronic modules from Chinese sites?

    Absolutely. Low voltage DC. However, Louis Rossman did a test of car blade fuses from Amazons top sellers. The 2A fuses finally triggered (blew) at nearly 10A!. Some didn’t at all. They were only thick metal direct to each blade. Now that is very concerning.
  9. Martaine2005

    constant current source with transistor

    Sounds TOO similar to ratstar:)
  10. Martaine2005

    constant current source with transistor

    What is the diagram supposed to be?. That poor transistor is toasted!.
  11. Martaine2005

    Ethics of buying electronic modules from Chinese sites?

    I believe Maplin went out of business because they were selling the same items that you can buy direct via eBay for a fraction of the price. 1 LED used to be £1.25 in Maplin. 500 LEDs from China a couple of quid. A cheap dash cam from Maplin, £69.99. Exactly the same item from China, £6.50...
  12. Martaine2005

    revolving platform

    No! That’s the maximum voltage it can handle. I don’t think you are reading the replies properly. I already told you that.
  13. Martaine2005

    Napco MA1008e Ver 2 - Battery Over current protection

    The @ChosunOne has risen. You are in good hands. :)
  14. Martaine2005

    revolving platform

    Yes, exactly. The reason for more ‘channels’ (circuits), is to have different signals, data or voltages for any number of reasons. A second motor on the moving platform or a device that requires 5V and not 12v for example. When you think of slip rings, imagine a ribbon cable that doesn’t...
  15. Martaine2005

    revolving platform

    Me thinks, you didn’t search for slip rings on YouTube! :)
  16. Martaine2005

    revolving platform

    Plenty of information online. Have a read of this: https://www.moflon.com/showen104.html Simply search for slip rings on YouTube.
  17. Martaine2005

    How to test this 24v 13" Worx Mower

    If you have two 12V batteries, connect them in series.
  18. Martaine2005

    Tantalum capacitors

    Perfectly fine.
  19. Martaine2005

    Tantalum capacitors

    Is it a bead type or SMD type? A,B, C, D etc seem to be size related. There are flame retardant ceramic equivalents but using the same type at a higher voltage may be better. 4.7uF 25V for example.
  20. Martaine2005

    How to test this 24v 13" Worx Mower

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