diff --git a/readme.md b/readme.md
index 9a817c0..d133594 100644
--- a/readme.md
+++ b/readme.md
@@ -25,3 +25,27 @@ g1 --> Ascent
 
 
 ```
+
+# Avionics Design 
+
+```mermaid
+
+%%{init: {'theme':'neutral'}}%%
+flowchart LR;
+
+t[Teensy 4.1]
+imu[Inertial Measurement Unit]
+b[Barometer]
+
+subgraph Propulsion
+r[Roll Motor]
+p[Pitch Motor]
+end
+
+
+imu & b -. I2C .-> t
+
+t -- PWM --> r & p
+
+```
+