Great—let’s design a compact, integrated PCB that brings together:
* ** ESP8266 NodeMCU board **
* ** TP4056 Li - ion charging module **
* ** 2000 mAh Li - ion battery connector **
* ** 3.3 V regulator(LDO) **
* ** 1.8″ SPI TFT display(128×160) ** with optional SD - card support
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### 🔌 Power Architecture
```
Li-ion Battery (2000 mAh)
└── B+ / B– ─→ TP4056 (charging & protection module)
├─ OUT+ → LDO IN (e.g. HT7333 or AMS1117‑3.3)
├─ OUT– → GND
LDO OUT → 3.3 V Power Rail → ESP, TFT VCC, SD card VCC, backlight LED
```
* Use a ** low - dropout regulator ** since TP4056 output ranges 3.0–4.2 V while stable 3.3 V is needed.
* Place decoupling capacitors(\~100 nF + 10 µF) near the regulator output and each digital IC.