A portable D1 Mini based WLED driver I made for my costumes and other portable WS2812B LED strip setups.

Couldn't find any other designs that had a combination of few things I needed

• Easily swap-able 18650 battery
• Physical power on/off disconnect
• Onboard charging and discharge protection
• Easy access to the D1 Mini Micro-USB connection
• Momentary button for WLED input
• Don't need to print a PCB because I'm too lazy to do a run

For this setup you need the following. I added links for the specifics I used, but the prices may have changed since and not all of these were bought for this project specifically, so they might not be the best units for you.

• A Lolin (Wemos) D1 mini or clone
• An 18650 battery (do not buy this from Amazon)
• TP4056 Battery Board
• 18650 Battery Clip
• 6x6x5mm button
• SS12D10 Sliding 2 position switch
• 22 Gauge Wire
• 3-pin JWT SM Connector

I solder everything and then hot glue the components in place once they are set. The setup is fairly straightforward, but since it is a dense package that includes soldering a couple joint leads to headers, I'll share my order of soldering and assembly:

• Battery Clip to Battery Board headers
• Battery board (+ out) header to slide switch
• (Joint) Battery board (- out) to both Momentary button and a hanging Out- Lead
• Momentary Button to D3 Header
• Thread in JST Connector
• (Joint) Sliding switch 'on' and the JST Load to the 5V Header
• (Joint) Hanging Out- Lead from Step 3 and JST Ground to Ground Header
• D4 Pin to JST signal
• Glue in Battery Board
• Glue in Sliding switch
• Glue in push button
• Glue in D1 Board

Safety Note: Since there is no diode protecting power backflow, if there is a Battery installed the battery power must be off (via the Hard Sliding Switch) when the 8266 board is powered directly from USB.