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Make me a 5mm sensor kit

published, Jan 12, 2011 1:44am
views (2749)

One of the smallest energy sensors available, our 5mm current sensor is a nice little thing. Able to fit inside the tightest of spaces, and accurate to around 2 percent.  Our kit needs a little love and care to craft, however it's straight forward enough that anyone can do it.

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Get your 5mm Sensor Kit at the SEGshop by following this link

What you need

Your kit should have the following stuff, if it's not all there let us know!

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5mm CSLT current sensor

  • Stereo lead
  • A large piece of heat shrink tube
  • Two smaller pieces of heat shrink tube (the colors of the tube may vary

...and some other stuff to expand your SEGmeter board

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  • Stereo jack
  • 22 Ohm Resistor
  • 1uF capacitor
  • 100nF capacitor

Let's put it all together now?

We need to connect the stereo lead to the sensor, it's kinda important to get the pins right - there is a little non obvious trick here.  Then it's a matter of expanding the SEGmeter board to add the new stereo Jack.  This second part is covered in the Build your SEGmeter guide

First up, we need to strip some wires.  I like to strip about an inch or 25mm in these metric lands of Antipodes.

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open up and say ahhh.

After the outer casing has been paired back, I half the shielding - and consign half to the bin and keep the other half for electron signal transportation.

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a haircut is needed here

After the little cut, strip the white and red wires and tin them with a good dabb of hot molten solder.

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warm the very heart of the Tin Man

Now, that done it's time to prepare for our planned intimacy with the CSLT sensor, it's only small so take care!  The pins need to be spread apart a little so we can get the soldering iron in and connect up the leads to the sensor.


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sometimes a little drink can help.

The next thing is VERY IMPORTANT!

This sensor needs a 5V power to operate the active electronics contained within.  This power comes from the ring of the stereo jack, and is transported down the white wire of the stereo lead.  The red wire is used for the signal back to the SEGmeter.

This little non-obviousness has caught out some SEGggers.  ;)

The following is the sensor pinout:

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Tin those little legs of the sensor to make it ready for the coming bonds.

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a little dab with some hot solder is all that's needed here

Before we get on with the next step, the heat shrink protection over the bits of wire that are going to be joined.  

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the wires need a little protection

Then it's a matter of soldering on the prepared wired to the pins of the sensor!

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a successful hookup

After satisfaction with the soldering work, then shrink the little bits of tubing, check the clearance of the pins to make sure there are no shorting out points, then dob a gob of hot glue around the area.

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goop gets in.

While the glue is still hot and pliable, slide the larger piece of heat shrink tube over the wires to complete the sealing of the connection.

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When the glue cools it's possible to pinch off the excess to make it all nice and neat.

Then hit the lot with some heat to shrink the outer protective tubing and it's done!

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All that's needed is to plug it into your SEGmeter and set the sketch up.



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