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Fig. 1: Circuit diagram of automatic battery charger When AC mains power is on, step-down transformer X1 generates about 15V AC and converts it to above 18V DC after rectification and filtering. DC ...
PZEM-004T V3.0 Fig: PZEM-004T V3.0 It communicates via Modbus-RTU protocol over TTL serial (), making it easy to interface with microcontrollers like Arduino or ESP32. With built-in galvanic isolation ...
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