diff --git a/Readme.md b/Readme.md
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@@ -41,8 +41,13 @@ As a function of the firmware, there is an embedded web application that is host
All of the non-electronic hardware is generated from OpenSCAD scripts and built into either STL files for 3D printing or DXF files for laser cutting or CNCing.
-Electronics designs are available in the form of a Fritzing file, a wiring diagram and a mask image that can be used to fabricate a board from a blank PCB. One of the easiest ways to
+Electronics designs are available in the form of a Fritzing file, Gerber files, a wiring diagram and a mask image that can be used to fabricate a board from a blank PCB.
+Prototype of the bare PCB of the "bonnet" for the Raspberry Pi Zero W are available for order from OSH Park. See the parts list below of components for this board.
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## PARTS
@@ -52,4 +57,10 @@ Electronics designs are available in the form of a Fritzing file, a wiring diagr
3. 120RPM 12VDC Motor - ?
4. Microswitch w/ Roller - [[Adafruit](https://www.adafruit.com/product/819)]
5. L7805 5V Regulator - [[Adafruit](https://www.adafruit.com/product/2164)] [Sparkfun](https://www.sparkfun.com/products/107)]
-6. (Optional) Proto Bonnet - [[Adafruit](https://www.adafruit.com/product/3203)]
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+6. 2x Thru-hole Resistors - 330 Ohm
+7. 1x Thru-hole Capacitor - 10 uF
+8. 1x Thru-hole Capacitor - 100 uF
+9. 4x Terminal blocks
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+* (Optional) Proto Bonnet - [[Adafruit](https://www.adafruit.com/product/3203)]
+* (Optional) INTVAL3 Bonnet - [[OSH Park](https://oshpark.com/shared_projects/SkPyOK5S)]