2 - Using the breadboard
barry (Administrator) 11-24-2015 at 04:08 AM.
Post: #1
The whole point of the NoSo One is that there's no soldering. You use a prototyping breadboard to create the circuit. It's simple - just push the wires and leads into the holes.

   

The picture above shows the breadboard with nothing (yet) added. I've drawn some coloured outlines to show how the holes are connected internally. Each row of five holes is isolated from the other; so the red and green holes are not connected, for example. By inserting components or wires from one row to another, you create your circuit.

   

The contacts under the holes are sprung to provide a mechanical grip and it's this that replaces the solder in a conventional circuit. The spring contacts are designed as a tight fit for component leads and solid (or tinned) wires, so it just takes a little effort to push them into place.

Note: There's just one very important thing to remember about breadboards: you ALWAYS add a component (or wire) from one row to another. Placing a component in two holes on the same row is nonsensical: it' would be like soldering both ends together! Smile
- - Quote -
barry (Administrator) 11-24-2015 at 04:12 AM.
Post: #2
Adding the power supply
The NoSo One uses a battery, with positive and negative terminals. The first step is to add red and black wires to connect the necessary rows.

First, add a short piece of red wire as a jumper at the top of the board. Trim and strip a piece of the solid wire so that the exposed ends are about 6mm long. Place them into the holes shown here and push the wire into position. The spring contacts hold it firmly in place.

       

The red wire is for the positive supply. For the negative supply, which connects to the 'ground' of our circuit, add three pieces of black wire as shown here.

   
- - Quote -
barry (Administrator) 11-24-2015 at 04:30 AM.
Post: #3
Adding the chip and completing its power supply
The LM386 'amp-on-a-chip' fits in the centre of the board. It straddles the centre gap in the breadboard. Place it as shown below.

   

Now you can extend the power supply to the appropriate pins on the LM386. Start with a red wire from the row at the far-left of the board to pin 6 of the chip, and then add a black wire from the far-right of the board to pin 4.

   

   
- - Quote -
barry (Administrator) 11-24-2015 at 04:34 AM.
Post: #4
Linking pins 2 and 4
For this circuit, we will ground pin 2 of the chip. The best way to do that is with a short wire to pin 4, which we've just connected to the negative side of the power supply. Strip a small length of wire and insert it as shown here.

   
- - Quote -
barry (Administrator) 12-07-2015 at 05:10 AM.
Post: #5
What next?
This completes the distribution of power around the breadboard and the connection of the power supply to the chip. Check that you've done all of the steps shown above and then we'll move on to adding components.
- - Quote -
Post Reply