Braincraft HAT tester

Before we can start fabrication of a new design we need to design a tester - that way we can verify all the components and firmware are working they way they ought to. In this case, the Braincraft HAT https://www.adafruit.com/product/4374 has a TFT display, two microphones and two speaker outputs. We can use the speakers to test the mic's and vice versa by playing a sine wave through each speaker and then checking the sound level on the matching mic. We should see a big difference! the TFT is tested by having the text show up on it, and next up I'll add headphone jack and joystick tests. A quick but effective full-coverage test is essential to getting our high quality electronics out there. #adafruit #braincraft #machinelearning Visit the Adafruit shop online - http://www.adafruit.com ----------------------------------------- LIVE CHAT IS HERE! http://adafru.it/discord Adafruit on Instagram: https://www.instagram.com/adafruit Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/ -----------------------------------------