diff --git a/README.md b/README.md
index 015fa18..1fdd77a 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,10 @@
 # AVR ATiny13 Project 002
 
 This is the firmware for a latching dual relay system. It allows the user to
-switch two DPDT relays by with two seperate switches.
+switch two DPDT relays by with two separate switches.
 
 
-## Componets:
+## Components:
 
 **Micro:** AVR ATiny13, ATiny25/45/85
 
@@ -28,7 +28,7 @@ switch two DPDT relays by with two seperate switches.
 
 1. Press and hold the target button.
 2. While holding the button power cycle the device.
-3. When the setting is sucessfully saved the relay/led will blink/toggle.
+3. When the setting is successfully saved the relay/led will blink/toggle.
 4. repeat until desired preset is saved.
 
 
@@ -47,15 +47,17 @@ with no changes.
 ## Timings
 
 The current setup is calculated for a attiny13/a running at 4.8Mhz without the
-clock divder fuse set.
+clock divider fuse set.
 
 This means that the actual f_cpu is 4.8Mhz to calculate the delay times
 we can use this formula:
 
 $$
-msPerOverflow = 1000ms / (\frac{4.8Mhz}{64} / 256) \aprox 6.8ms
+msPerOverflow = 1000ms / (\frac{4.8Mhz}{64} / 256) \approx 6.8ms
 $$
 
+Where $64$ is the pre scaler setting and $256$ is the maximum value of the 8bit
+timer.
 
 ## BUILDING PROJECT:
 
@@ -73,8 +75,8 @@ make flash
 
 1. Install the usbtiny driver:
     1. plug in usbtiny device 
-    2. Intall the drivers from: [adafruit](https://learn.adafruit.com/usbtinyisp/drivers) 
-2. open powershell
+    2. Install the drivers from: [adafruit](https://learn.adafruit.com/usbtinyisp/drivers) 
+2. open Powershell
 3. navigate to the repo directory *cd Downloads\gf_002*
 4. enter the command below.
 
@@ -89,7 +91,7 @@ make flash
     1. plug in usbasp device 
     2. run the 'zadig-2.8.exe' program
     3. select the libusb 32 on the right by clicking the down arrow to select.
-2. open powershell
+2. open Powershell
 3. navigate to the repo directory *cd Downloads\gf_002*
 4. enter the command below.