![]() ![]() ![]() The 1K resistor is under the white tubing. It is not necessary if you power with USB through the Wemos D1. The only part that is not shown on the schematic is the black capacitor that was placed on the power input connections to filter the DC power when I used a noisy external power supply. Most of the wiring is on the back of the board. This close-up shows the potentiometer (to the far right) that can be used to adjust the brightness of the display. If you only have a 4 ohm speaker put a 3 to 5 ohm resistor in series with the speaker.The 4 module display has been placed behind a piece of red acrylic to make it more visible. Be sure to use an 8 ohm speaker with the DFPlayer. The speaker is connected to the red/black wire that goes off to the left of the photo. The DFPlayer is to its left and contains a micro SD card with the sound files. It is connected to a USB cable to supply power to the circuit. The Wemos D1 processor with WiFi is on the right side of the board. ![]()
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