rbAmp vs PZEM-004T: which AC energy monitor should you build with? The PZEM-004T is the default first energy meter for a reason — it's a few dollars, it works, and half the tutorials on the internet u...

Why leave a PZEM that works? A PZEM-004T is a fine little meter. It keeps its own kilowatt-hour total in EEPROM, so your energy survives a reboot, and for one circuit it does the job. You outgrow it f...