Update to Power Supply design and parts

Author: dave-ct

README.md

@@ -50,10 +50,10 @@ need but can be sourced from any supplier :-)  Will add other links later
 | Electric Water Pistol   | [Amazon](https://www.amazon.co.uk/dp/B0BWNDTKFJ)                                     |
 | Pantilt Mechanism       | [Ali Express](https://www.aliexpress.com/item/1406199345.html)                       |
 | 2 x Servos              | [Ali Express](https://www.aliexpress.com/item/1005007208312977.html)                 |
-| Power Supply            | Work In Prgress, will update soon                                                    |
+| Power Supply            | [See Power Supply Section](#Power-Supply)                                            |
 | Cables                  | TBC                                                                                  |
 | Tubing for water pistol | [Amazon](https://www.amazon.co.uk/dp/B07PNQ5BXD)                                     |
-| Case fro Compnents      | Whatever fits, will add 3d printed one later                                         |
+| Case fro Components     | Whatever fits, will add 3d printed one later                                         |
 
 ***
 # Connecting the parts together
@@ -97,6 +97,31 @@ The below diagram shows the overall circuit wiring for the servos and the water
 Note that the batteries in the image are just for illustration purposes
 ![wiring](docs/images/Wiring.png)
 
+### Power Supply
+To be able to run all the components from a single power supply I used a spare 12v 10Amp 
+power supply and then three buck converters to seperate the  power sources.
+The diagram below shows how it was wired up.
+![power_supply](docs/images/Power_Supply.png)
+May require a 470uf capacitor across the motor that drives the waterpump mechanism (TBC)
+
+This table shows the key parts that can be used
+
+| Description                        | Link                                                     |
+|------------------------------------|----------------------------------------------------------|
+| 12v 10Amp Power Supply (110v/240v) | [Amazon](https://www.amazon.co.uk/gp/product/B07J43TMYW) |
+| Buck Converter 12v to 5v DC        | [Amazon](https://www.amazon.co.uk/dp/B09PFV3SWN)         |
+| In line 5mm x 20mm fuse holder     | [Amazon](https://www.amazon.co.uk/dp/B07C58WPL7)|        
+| 3amp slow blow 5mm x 20mm fuse     | [Amazon](https://www.amazon.co.uk/dp/B08FJ7DSBX)         |
+| 3amp quick blow 5mm x 20mm fuse    | [Amazon](https://www.amazon.co.uk/F5AL250V-Cartridge-Household-Appliances-Electricals/dp/B0D8VP5YD3)|
+
+
+If using a raspberry PI5 the above may not work, need to test, but you should be able to use a Power PD Trigger Activation Module instead of one of the buck converters
+and also use a 5amp fuse instead of a 3amp fuse.  **This has not been tested yet, but will be soon**.
+
+| Description                        | Link                                                                        |
+|------------------------------------|-----------------------------------------------------------------------------|
+|Raspberry Pi5 Power PD Trigger Activation Module Jetson 5V5A 27W PD DC USB Dual Input Wide Voltage Dual Output for PI 5| [Ali Express](https://www.aliexpress.com/item/1005007096153347.html)        |
+
 
 ### AI Camera
 You simply connect the AI camera to the raspberry pi camera port the Raspberry PI 4b.