diff --git a/07-LM339N-ADC/README.md b/07-LM339N-ADC/README.md
index 4b065dc..a1d80dc 100644
--- a/07-LM339N-ADC/README.md
+++ b/07-LM339N-ADC/README.md
@@ -64,7 +64,7 @@ When working with electronics, you might see something called a "pull up" or "pu
 
 Electricity, like water, always wants to take the path of least resistance possible. So if there is a resistor of any value in a circuit path, the electrons will prefer to go a different way until the path of least resistance is found. Pull up and pull down resistors use this property of electricity, in cooperation with [transistors](../02-buzzers_with_transistors#transistors), to control the flow of voltage between a supply and a ground. 
 
-In lesson 2 I talked about [how transistors work]9[transistors](../02-buzzers_with_transistors#transistors)), having a collector, an emitter, and a base. They work by a charge coming into the base and changing the amount of charge carriers that can pass through depletion zone in the `P/N` materials at the `BC` and `BE` junction. Crudely speaking, the base connector is used like a switch to turn the flow from one side of the transistor to the other (depending on how the transistor is configured) on or off.
+In lesson 2 I talked about [how transistors work](../02-buzzers_with_transistors#transistors)), having a collector, an emitter, and a base. They work by a charge coming into the base and changing the amount of charge carriers that can pass through depletion zone in the `P/N` materials at the `BC` and `BE` junction. Crudely speaking, the base connector is used like a switch to turn the flow from one side of the transistor to the other (depending on how the transistor is configured) on or off.
 
 If we look at the block diagram for the LM339N [from the datasheet](https://www.ti.com/lit/ds/symlink/lm339-n.pdf?ts=1781077876487), we can see that the integrated circuit is made up of (among other things) a number of transistors, especially transistors that sit right at the output pins: