PCB added for Lolin D32 (untested!)

PCBs/Wemos Lolin D32/README.md

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+# Tonuino-PCB based on Wemos' Lolin D32
+
+## Attention
+This PCB is not yet tested!
+
+## Features
+* Fits Wemos Lolin D32 (not Lolin32, Lolin D32 pro or Lolin 32 lite!)
+* Outer diameter: 55 x 81mm
+* JST-PH 2.0-connectors for buttons, rotary encoder, Neopixel, RFID, battery and reset (not 2.54mm pitch!)
+* 2.54mm-connectors for MAX98357a and uSD-card-reader
+* Mosfet-circuit that switches off MAX98357a, Neopixel, headphone-pcb and uSD-card-reader automatically when deepsleep is active
+* All peripherals are solely driven at 3.3V! Keep this especially in mind when choosing uSD-reader. If in doubts use one without voltage-regulator (link below).
+* If [headphone-pcb](https://github.com/biologist79/Tonuino-ESP32-I2S/tree/master/PCBs/Headphone%20with%20PCM5102a%20and%20TDA1308) is used, MAX98357a is automatically muted when there's a headphone plugged in and vice versa.
+* If `HEADPHONE_ADJUST_ENABLE` is enabled and a headphone is plugged in, an alternative maximum volume is activated. I added this feature because [headphone-pcb](https://github.com/biologist79/Tonuino-ESP32-I2S/tree/master/PCBs/Headphone%20with%20PCM5102a%20and%20TDA1308) makes use of an amp that (probably) "allows" children to damage ears. This maximum volume can be set and re-adjusted via webgui.
+* Reset-button
+
+## Prerequisites
+* If no [headphone-pcb](https://github.com/biologist79/Tonuino-ESP32-I2S/tree/master/PCBs/Headphone%20with%20PCM5102a%20and%20TDA1308) is connected, make sure `HEADPHONE_ADJUST_ENABLE` is not active.
+* Make sure to change values of voltage divider's restors. They can be configured in `settings.h` as `rdiv1` and `rdiv2` and need to be set to 100+/100k.
+* Chane `VOLTAGE_READ_PIN` to 35.
+
+## Things to mention
+* RFID: In order to avoid buying a 6pin-JST-PH-connector I used 2x3pin. This is because I already had ten of them (see link below). Accidently, on my PCB-layout, I switched the direction of one of these two connectors. However, it's just an visual issue.
+* Better don't solder Lolin D32 directly to the PCB. I recommend to make use of female connectors instead (link below).
+* When ordering a LiPo-battery, make sure to use [one](https://www.eremit.de/p/eremit-3-7v-2500mah-lipo-104050-jst-ph-2-0mm) with deep discharge protection! This is really really really important!!!
+
+## Hardware-setup
+The heart of my project is an ESP32 on a [Wemos Lolin D32 development-board](https://de.aliexpress.com/item/32808551116.html). Make sure to install the drivers for the USB/Serial-chip (CP2102 e.g.).
+* [MAX98357A (like Adafruit's)](https://de.aliexpress.com/item/32999952454.html)
+* [uSD-card-reader 3.3V only](https://www.ebay.de/itm/Micro-SPI-Kartenleser-Card-Reader-2GB-SD-8GB-SDHC-Card-3-3V-ESP8266-Arduino-NEU/333796577968)
+* [RFID-reader](https://www.amazon.de/AZDelivery-Reader-Arduino-Raspberry-gratis/dp/B074S8MRQ7)
+* [RFID-tags](https://www.amazon.de/AZDelivery-Keycard-56MHz-Schlüsselkarte-Karte/dp/B07TVJPTM7)
+* [Neopixel-ring](https://de.aliexpress.com/item/32673883645.html)
+* [Rotary Encoder](https://de.aliexpress.com/item/33041814942.html)
+* [Buttons](https://de.aliexpress.com/item/32896285438.html)
+* [Speaker](https://www.visaton.de/de/produkte/chassiszubehoer/breitband-systeme/fr-7-4-ohm)
+* uSD-card: doesn't have to be a super-fast one; uC is limiting the throughput. Tested 32GB without any problems.
+* [JSP PH-2.0-connectors](https://de.aliexpress.com/item/32968344273.html)
+* [Female connector](https://de.aliexpress.com/item/32724478308.html)
+* [(optional) IDC-connector female 6pin for headphone-pcb](https://de.aliexpress.com/item/33029492417.html)
+* [(optional) IDC-connector male 6pin for headphone-pcb](https://de.aliexpress.com/item/1005001400147026.html)
+* [LiPo-battery (2500 mAh) with connector JST PH 2.0mm](https://www.eremit.de/p/eremit-3-7v-2500mah-lipo-104050-jst-ph-2-0mm)
+
+## Parts
+* 1x IRF530NPbF (N-channel MOSFET)
+* 1x NDP6020P (P-channel MOSFET)
+* 1x 1k resistor
+* 1x 10k resistor
+* 2x 100k resistor
+* 5x JST-PH2.0-connector (2 Pins)
+* 3x JST-PH2.0-connector (3 Pins)
+* 1x JST-PH2.0-connector (5 Pins)
+* Female connector as socket for Lolin32, uSD-reader and MAX98357a
+* (optional for headphone-PCB) 1x IDC-connecor female (6pin)
+* (optional for headphone-PCB) 1x IDC-connecor male (6pin)
+
+## Where to order?
+I ordered my PCBs at [jlcpcb](https://jlcpcb.com/). You have to order at least 5 pcs, which is only at 2$ + shipping. It took two weeks to arrive. If you want to have a look at the PCBs first (without having KiCad installed), visit [Gerberlook](https://www.gerblook.org/) and upload `gerber.zip` from the Gerberfiles-folder.
+
+## Do I need to install KiCad?
+Unless you don't want to change anything: no! All you need to provide are the gerberfiles (`gerber.zip`) to your manufactur (e.g. [jlcpcb](https://jlcpcb.com/)). However, all Kicad-files used are provided as well.