Tuesday, July 27, 2010

Bits 'n' Bobs

Bits n bobsAs part of an order for some more electronics components, I saw some LED's in the 'customers who bought these also bought these' section.

I thought 'why not' and ordered 10 of them.

Big mistake - you can see a strip of seven of them in the picture - the little green dots you can see are the LED's themselves. They have no wires or anything, as they are designed to be soldered flat onto a circuit board.

I put a normal sized pencil in the picture by way of a comparison. I don't see how these can be much use to me, as they are just so tiny. Not unless I have a sudden inspiration.

The most amazing thing about the lights is that each of those tiny spots are in fact both a green LED and a red LED in the same package.

Before finally getting one of these soldered down and working, I'd already lost one and burnt out another!

Anyway, it struck me it might be interesting to connect one of these up to a set of those big D sized batteries (4.5V and 510 ohms for the detail guys) and see how long the light stays on with the same set of batteries.

It was connected up last night, at 19.00, and is bright enough to give the room a faint red glow...


  1. Anonymous8:03 PM

    SMDs. Best steer clear if you're not ready for them. SOP for mounting those things is to place all the parts then bake the whole circuit in an oven. Best stick with normal through-hole leads and that.

  2. Anonymous11:53 AM

    You prove nothing by connecting to batteries...all batteries are not created equal....some last 2 hours...some 8.....some 16.

  3. Hi Anonymous

    SMC's certainly have their place, in making something really compact for example.

    I just don't have the technology to make up the actual boards themselves.

    Through hole components are, of course, much more user friendly.



  4. Hi Anonymous

    Relax - this is hardly a major scientific experiment, just a bit of fun using an LED I cannot think of a better use for.