- fix spelling error, add schematic to readme

README.md

@@ -23,6 +23,8 @@ Turns a Raspberry Pi into a cheap, web-enabled kiln controller.
 
 ## Hardware
 
+### Parts
+
 | Image | Hardware | Description |
 | ------| -------- | ----------- |
 | ![Image](https://github.com/jbruce12000/kiln-controller/blob/master/public/assets/images/rpi.png) | [Raspberry Pi](https://www.adafruit.com/category/105) | Virtually any Raspberry Pi will work since only a few GPIO pins are being used. |
@@ -32,8 +34,11 @@ Turns a Raspberry Pi into a cheap, web-enabled kiln controller.
 | ![Image](https://github.com/jbruce12000/kiln-controller/blob/master/public/assets/images/ssr.png) | Solid State Relay | zero crossing, make sure it can handle the max current of your kiln. You only need one SSR, even if the kiln is 240V. |
 | ![Image](https://github.com/jbruce12000/kiln-controller/blob/master/public/assets/images/ks-1018.png) | Electric Kiln | There are many old electric kilns on the market that don't have digital controls. You can pick one up on the used market cheaply.  This controller will work with 120V or 240V (pick a proper SSR). My kiln is a Skutt KS-1018 |
 
+### Schematic
 
-## Installation
+![Image](https://github.com/jbruce12000/kiln-controller/blob/master/public/assets/images/schematic.png)
+
+## Software 
 
 ### Raspbian
 

troubleshooting.md

@@ -16,7 +16,7 @@ If you're using a breadboard with a labeled break-out board, verify:
 
 * where pin one is using a multimeter.  it sounds stupid, but it will save you time.
 * measure the voltage between all the 3V3 pins and a GND pin
-* measure the voltage betwwen all the GND pins and a GND pin
+* measure the voltage between all the GND pins and a GND pin
 * measure the voltage between the 5V pins and a GND pin
 
 ## Test Each GPIO Pin