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First PCB prototype!

A project log for Teensy Beats Shield

An all-in-one, made to hack step sequencer built around the Teensy platform with LiPo charging, touch TFT, encoders, buttons, and RGB leds.

Chris MillerChris Miller 09/27/2018 at 06:260 Comments

I received PCBs today and built the first prototype.  Everything went pretty well, except one slight issue that was easily fixed.  I hadn't thought through one part of the power control circuitry.  In an attempt to clamp a 5v "power on" signal to 3.3v for the Teensy, I did not consider the minimum logic level for the boost converter's enable pin.  So the circuit was not turning on.  A little simulation and rerouting one node of the circuit with a wire fixed the problem.  This could be easily fixed in the first revision of the PCB.  I'm using a smaller TFT touch screen that I had on the breadboard.  Consequently, I think my touch screen values calibration is way off and needs to be redone.  I'm very happy with the way all of the components look together.

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