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@@ -15,6 +15,15 @@ Leveraging a [Adafruit QT-PY ESP32-S3 board](https://www.adafruit.com/product/54
 - GND - common ground for all components
 ![qt-py](uploads/46add87f4da57f548f744e3a2eb730fa/qt-py.jpg)
 
+## Prototype Board
+To provision the system, we developed a prototype on a half-breadboard which includes: 
+- the microcontroller
+- 4x NPN transistors
+- 4x 2.2kohm resistors
+- 6x male header pins - wired to the relay board
+
+![circuit-design](uploads/3ed45d74607e5734da92e6bad23d6605/circuit-design.png)
+
 # Deprecated details related to U.S. Solid hardware
 Reverse engineering was successful with the identification of key components as follows:
 ## Motor control