diff --git a/hardware/README.md b/hardware/README.md
index 50725ca..2ae2d54 100644
--- a/hardware/README.md
+++ b/hardware/README.md
@@ -2,19 +2,20 @@
 ## LTSpice simulation
 
 By modifying the $R_{cal1}$ resistor we can see that the maximum output voltage can go up to $5V$. The goal would be to modify this resistor value to have a maximum output of around $3.3V$:
+#### Calculate $a$
 $$a=\frac{\Delta{y}}{\Delta{x}}=\frac{y_2-y_1}{x_2-x_1}$$
 $$AN: a=\frac{10k-1k}{2.1-4.94}$$
 $$AN: a=-3170$$
----
+#### Calculate $b$
 $$y=-3170x+b$$
 $$1000=-3170(4.94)+b$$
 $$b=3170(4.94)+1000$$
 $$b=16659$$
----
+#### Numerical Application
 $$y=-3170x+16659$$
 We can now calculate the resistor $R_{cal1}$ to have $3.3V$ in maximum output with the previous formula, we find:
 $$-3.17\times{10^3\times{3.3V}}+16.7\times{10^3}=6.2k\Omega$$
 
 ![rcal_ok](img/rcal.png)
 > Has we can see with the LTSpice simulation, we have the correct maximum voltage, it does not go further than $3.29V$ which is exactly what we wanted.
-## Electronic CAD
\ No newline at end of file
+## Electronic CAD