fixed : broken power adapter for Umax SOHO ethernet switch

Question :

I have an old Umax SOHO 1OHO8 ethernet switch that I would like to use in my LAN-network, but the power adapter has a very strange problem : one of the pins that go into the wall power outlet has come loose, and now ‘retracts’ whenever I plug the power outlet.

I already tried gluing the pin back into the power adapter with superglue, but I can’t fasten it, so it keeps coming loose. I also tried using an adapter plug, but I couldn’t find one that enabled me to keep the pin from retracting…

What can I do to fix this ?


Answer :

Just buy a new one.

You probably won’t be able to find the original one, but you will be able to find a new generic one with the correct specs.

The specs of the Umax SOHO 1OHO8 power adapter are :

  • AC input 230V (so 100-240V will do)
  • DC output 7.5V 1A (= 1000mA)
  • output plug/pin 5.5×2.1mm (= 5.5mm outside diameter & 2.1mm opening diameter inside)
  • output plug/pin polarity : MINUS outside & PLUS inside

You can get a US-version replacement here : US power adapter 7.5V 1A 5.5×2.1mm

You can get a UK-version replacement here : UK power adapter 7.5V 1A 5.5×2.1mm

You can get a EU-version replacement here : EU power adapter 7.5V 1A 5.5×2.1mm  (note that this one actually has a 5.5×2.5mm plug that is compatible with 5.5×2.1mm)

enjoy !

fixed : QD520 IP-cam power adapter missing – which specs ?

Question :

I bought myself a very good-value-for-money IP-cam that is called the QD520, only to find out no power adapter was included in the packaging. What are the specs of the official power adapter and where can I get one ?


Answer :

The QD520 IP-cam is sold under various brand names, including :

  • Escam QD520
  • Vigica QD520
  • Crenova QD520
  • RioRand QD520
  • iCatch IT-MC7101E
  • iCatch IA-MC7101E


The specs of the original adapter for this QD520 IP-cam are :

  • AC/DC adapter
  • model : SP-888
  • input : 100-240V AC 50/60Hz 0.3A
  • output : 12V DC 1A
  • tip : 5.5mm outside / 2.1mm inside
  • polarity : center positive ( minus = corona / plus = tip )


These adapters are available here :

QD520 power adapter US-version @

QD520 power adapter UK-version @

QD520 power adapter EU-version @


Good Luck !

enjoy 😉

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