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Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.

0 votes

Piezo into 0-5V ADC, with offset center voltage?

If the resistors R3 and R4 are 1MΩ( in LTspice; 1m = 1 milli Ω , 1M = 1 mega Ω ) your circuit will work. For some additional improvements, you can take a look at the frequency response of your circuit …
Fernando Luiz Cola's user avatar
1 vote

LDO or Switching for 24V Input, 5V Output

In general a switching regulator is more power efficient than an LDO. Depending how much your circuit will consume I would prefer to use the switching regulator(LM2576T).
Fernando Luiz Cola's user avatar