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Changes to Step #21

Edit by Geoff Wacker

Edit approved by Geoff Wacker

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[* black] With the strain gauge bracket removed, we take a closer look at the chips powering this newfangled trackpad:
[* red] Broadcom [https://chipworks.secure.force.com/catalog/ProductDetails?sku=BRO-BCM5976A0KUB2G|BCM5976|new_window=true] touchscreen controller
- [* orange] ST Microelectronics [http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1031?sc=stm32f1|32F103|new_window=true] ARM Cortex-M based microcontroller
+ [* orange] STMicroelectronics [http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1031?sc=stm32f1|32F103|new_window=true] ARM Cortex-M based microcontroller
[* yellow] Linear Technology [http://www.arroweurope.com/services/download-center.html?tx_abdownloads_pi1%5Baction%5D=getviewclickeddownload&tx_abdownloads_pi1%5Buid%5D=1007&cHash=6c90b2ba6639e0cdc855d3c5395ace3b|LT3954|new_window=true] LED Converter with Internal PWM Generator