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  1. davelx

    Office 365 home

    Have you read the q&a on that offer. There's a severe restriction right at the bottom.
  2. davelx

    Measuring resistance with Ohm's law does not work with sensors because? Does anyone with knowledge about alarms have an explanation

    What I was getting at is that all power sources have internal resistance and the available voltage will be split across the internal resistance and the load. This will be the case even if the load is just a simple resistance. For example, suppose you have a 10V supply and a 1000ohm (1k) load...
  3. davelx

    Measuring resistance with Ohm's law does not work with sensors because? Does anyone with knowledge about alarms have an explanation

    How are you powering the circuit? The source impedance of the supply could be skewing the readings.. A diagram would be helpful
  4. davelx

    New skool phone wiring

    So it's not just me, then!
  5. davelx

    New skool phone wiring

    What I did was to get OR to install the NTE 5 with the unfiltered faceplate, then I ran a normal phone extension from that upstairs to where I wanted the router, where I installed a NTE 5 with filtered faceplate to which I could connect both the router and a phone. For the dowstairs phone...
  6. davelx

    What reasons for outdoor chrismtas led string lights not to work, even if electric signal detected?

    Those pens detect the presence of a voltage above a given level, not the flow of current.
  7. davelx

    How many wires for phone VOIP

    Not these days. Very few, if any, modern phones require the "bell" wire to "ring".
  8. davelx

    Requirements for new cooker?

    Minimally trained delivery persons following an instruction sheet with no understanding of electrics
  9. davelx

    Home LAN access to a device...

    Not clear to me that there are any "incoming" connections. If the PI and the browser are on the same local subnet, then after the initial ARP query to determine the local MAC address of the Pi, no traffic goes through the routing function, only through the built-in wifi AP and switch. If the Pi...
  10. davelx

    Broadband and telephones

    I was about to make that same point. When directly connected your laptop has a globally visible IP address and is open to port scans and all sorts of attacks.
  11. davelx

    Broadband and telephones

    Excellent! That may not work for other ISPs though.
  12. davelx

    Broadband and telephones

    What makes you say that? DHCP is just the mechanism for the router to get its WAN address. It still needs the correct data link protocol, but a router may be abke to negotiate that. A PC almost certainly can't, which is why your original statement about a single device required qualification.
  13. davelx

    Broadband and telephones

    And what, exactly, do you believe the function of DHCP to be? It is NOT a data-link protocol. Hint - it stands for Dynamic Host Configuration Protocol I'd suggest you do some reading: https://www.waterstones.com/book/interconnections/radia-perlman/9780201634488
  14. davelx

    Broadband and telephones

    Only if said device supports PPoE and you know how to configure it.
  15. davelx

    How to extend an outdoor armoured cable (Ed.)

    I asked that question in post #3 - no response so far.
  16. davelx

    CAT6 cable, shielded or unshielded

    You can get sockets with an extra contact for the shield ( my mixer and stage box has them) but most if not all domestic devices won't have them.
  17. davelx

    How to extend an outdoor armoured cable (Ed.)

    And when you say the SWA is "10mm" exactly which dimension are you referring to?
  18. davelx

    Level 3 C&G cable sizing calculations

    RFCs are a kluge, they are "deemed" to be compliant cos the regs say they are.
  19. davelx

    EV Charging from a 13A Socket

    Clearly! More likely this was written somebody in the marketing department who knows nothing, and aimed at customers who are not expected to understand the technical detail anyway.
  20. davelx

    Replacing CU: 16mm or 25mm SWA?

    Well, the current carrying capacity of 16mm² 70C Thermoplastic SWA is between 78 and 97A (from table 4D4A), depending on how it is installed, which is less than the 100A fuse in the cut-out (if there really is a 100A fuse in there). So strictly speaking you can't use that cable with a 100A...
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