I'm a newbie and don't know what components i need

I'm a newbie in creating electronics from scratch, in fact I've never done it before and I was hoping if I explain what my project is someone can explain what I must do and buy.

I'm a GCSE student working on my D&T coursework. My project involves a wristband (with a pulse sensor) that will connect to different coloured LED lights and when a heartbeat is over a certain bpm the bulb will shine a specific colour. I'm not too worried about the code for the bluetooth right now, just what components I need to buy.
I know I need:
a pulse sensor
2 bluetooth chips

I'm not exactly sure what i need to make the bluetooth chips connect. I am not intending to use a phone in this, I've tried to research this but every time I do it always involves a phone.

So if you get through this course on answers you didn't have to find out, what will the next course you won't know how to deal with be?

HOW can you get far enough in the course to need to make circuits with BT chips and not know so much that you appear so clueless?

"I'm a newbie in creating electronics from scratch, in fact I've never done it before "
Really? What can you do regarding circuits? Can you blink a led without burning it up?
Do you know simple things like Ohm's Law? Kirchoff's Laws? You won't do much without those.

Before you write a story it helps to know those ABC's, spelling and grammar. Electronics has its own path where you start at the start and work your way up ... what you write says that you have skipped some steps.

One clue. An RGB led has 4 leads (3 colors plus ground) but is still a single led that can make any color.

That's not exactly very clear. If the Bluetooth doesn't connect to a phone what does it connect to? Where exactly is the pulse sensor and where exactly are the "different coloured LED lights" (and why isn't it a single RGB LED that can turn different colours)?


A lot of UK schools are often set up to do D&T stuff with PICAXEs.

Love them or hate them they are quite handy for starter projects.

I like PICAXEs and only moved on from them when I needed faster speed, floating point maths and library support for dispalys and the like.

Your going to need to flash a green LED
Capture amount of light from a phototransistor
Use math to figure out heart rate.

Once you get that working, sending data wirelessly would be next step.