LED Binary Clock

Step 5 Solder display

For the display you need 17 surface mount LEDs, 6 100 ohm surface mount resistors, 11 zero ohm links and 9 2cm lengths of bell wire. Solder them to the PCB as per the diagram below, ensureing you solder the LEDs in the correct orientation.

The display board shown here is a newer version than is used in the rest of the photos in this instructable, it has fewer resistors so is easier and cheaper to make.

Care must be taken when mounting the zero ohm links (resistors with zero resistance) as there are tracks on the PCB running between the 2 solder pads, the links must be positioned so that neither of the metal terminals touch the PCB track between the pads.

Comments

[moapz]

can I use bell wire instead of zero ohm ?
why zero ohm ?

[ElevenOf9]

Hi, yes you can use bell wire instead if you want, just make sure you don't short out the track that runs between the 2 contacts for each link. I used zero ohm links for 2 reasons, I think in this application they look neater than wire links and more importantly I have about 200 of them that I need to use up on something.