Instructions

How to Build a Rainbow

Insert the 10K resistor (brown, black, black, red, brown) into the area marked R1. It can go either way round. Bend the legs and push it in until it lies flat against the board. Hold the resistor in place, turn the board over, and bend the legs slightly outwards to hold it in place. Solder both legs, then cut them off as close to the board as you can.
R2 is 33R (orange, orange, black, gold, brown), R3 is 47R (yellow, purple, black, gold, brown), R4 is 100R (brown, black, black, black, brown). The resistors can go either way round. Insert and solder one at a time, or all at once if you're confident!
Insert the chip socket in the area marked IC1. Don't confuse this with the chip – the chip socket has eight little holes on top that the chip can be pushed into later. The notched end should be at the end marked with a notch on the board. Hold it fully in place and bend over a couple of the legs to hold it securely. Solder all the legs.
The push button goes in the area marked PB1. It will be much easier to insert if you straighten the legs with pliers first. Solder all the legs.
The LED goes in the corner marked L1 - the cut-off corner must match the cut-off corner marked on the board. Push it firmly in and solder all the legs.
The capacitor (marked 104) goes in C1, either way round. There is a choice of two holes for the leg nearer the bottom of the board, depending on the size of capacitor in your kit. Hold it in place and bend the legs outwards, then solder. Cut the legs off as close to the board as you can.
The battery lead goes up through the large hole from underneath the board, and then the leads bend over to the small holes, red to POS and black to NEG. Pull the leads tight enough that the ends stay in the holes. Solder the leads (tricky! Try using something heavy to hold the board down) then cut the ends off close to the board and pull the lead tight.
The chip pushes into the socket - the notched end MUST be nearest the capacitor.
The batteries go in with the flat ends towards the springs - the same as almost all batteries!
You can now attach the board to the battery box using an elastic band - we suggest you use the bottom (plastic) side of the battery box as sometimes the bottom of the circuit can be sharp, cutting through the paint on the batteries and causing short circuits.