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  1. Arouse1973

    common mode choke

    Not sure if this will fit but you can get them. https://www.mouser.co.uk/ProductDetail/Triad-Magnetics/CMT-8111?qs=sGAEpiMZZMsVJzu5wKIZCTneSmIy4AnvMpsbuakh%2feY%3d Thanks Adam
  2. Arouse1973

    UK specific laws regarding the sale of self made electrical goods?

    Unfortunately you can't really avoid the red tape unless you are producing a kit where the public build it themselves, then it's a little easier. As a minimum you would need EMC testing, ESD, LVD and possibly IP testing and environmental testing. The last two are to prove reliability of the...
  3. Arouse1973

    common mode choke

    Can you show us a picture of the choke please? Thanks Adam
  4. Arouse1973

    Change in site ownership

    Oh no Ian. Sadly missed. Have not been on for a while due to personal reasons. Hope it goes well for you. Adam
  5. Arouse1973

    Successful Stanford Research SR530 lock-in amplifier repair

    As long as you have a stable supply voltage and choose the correct cap value versus voltage you will be fine. You should be able to find this information on the data sheet. One thing you do have to watch with low ESR caps is if you are suppling power to them using long wires at switch on you can...
  6. Arouse1973

    Thoughts on Voltera?

    Quite a while. But they are not that expensive.
  7. Arouse1973

    Thoughts on Voltera?

    I came across these guys and I have used the equipment. It's not as good looking as the one Ian mentioned but it does a good job. https://cirqoid.com/ Thanks Adam
  8. Arouse1973

    Circular?

    No problem KE :)
  9. Arouse1973

    Circular?

    Here you go :)
  10. Arouse1973

    Circular?

    Not sure. Let me have a look. Cheers Adam
  11. Arouse1973

    Circular?

    That was the PCB I designed for Jeff. I used DIPTRACE for that design. Cheers Adam
  12. Arouse1973

    Mathematics

    At the OP. Sometimes it better to tell us what part of math don't you understand when it comes to electronics. I prefer this method when someone thinks they are poor at math. You might amaze yourself if we give you a few tip that in fact you actually know math better than you thought. Adam
  13. Arouse1973

    Li ion battery charger, adapting power bank

    Thank you Steve. It makes it easier for everyone to see what you are talking about. Thanks Adam
  14. Arouse1973

    Li ion battery charger, adapting power bank

    Can you post some pictures please Steve of the battery and where they are used? Thanks Adam
  15. Arouse1973

    Anyone know what type of resistor this is?

    Good luck Teddy. Cheers Adam
  16. Arouse1973

    Anyone know what type of resistor this is?

    Agreed. I can only say what colour I think it is. I am not going to wait for everyone else if I want to answer the post. I will in future ask the OP to say what the colours are. Thanks Adam
  17. Arouse1973

    Anyone know what type of resistor this is?

    What's jumping the gun got to do about a colour on a resistor. It looks red to me, but sure it could be brown. That's like saying lets wait to see what colour everyone else thinks it is before saying anything.
  18. Arouse1973

    Anyone know what type of resistor this is?

    Teddy as WHONOES thinks the first band might be brown, it may be worth you deciding on what colour you think it is before you buy and resistors. Cheers Adam
  19. Arouse1973

    Anyone know what type of resistor this is?

    Some 2W versions https://www.amazon.co.uk/Axial-Lead-Tolerance-Metal-Resistor/dp/B00SWKFGCM/ref=sr_1_3?s=diy&ie=UTF8&qid=1523305249&sr=1-3&keywords=20+ohm+resistor+2W&dpID=51oU%252BcemKVL&preST=_SY300_QL70_&dpSrc=srch
  20. Arouse1973

    Anyone know what type of resistor this is?

    Here are some 1W resistors on Amazon. https://www.amazon.co.uk/Tolerance-Flameproof-Axial-Metal-Resistor/dp/B00SWK62LQ/ref=sr_1_7?ie=UTF8&qid=1523305147&sr=8-7&keywords=20+ohm+resistor
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