tpLdE

06_Voltmeter jumps with the sound_MCU-free

Overview

The schematic design shows that
the voltmeter needs to be connected in parallel with a 4.7k resistor, otherwise it can only reach 1 and a half. . . Sensitivity is adjustable. The position of
the PCB design instructions
line is determined by your own position. My power supply is on the upper side. The power consumption is 4 mA without sound and 4.5 mA at full load. Rounding off, it equals no electricity. 5V power supply.
Software Description
Software-free

physical display instructions
Tips: Physical pictures of the work, and descriptions can be added to the pictures.

The precautions
are very easy, the effect is objective, just play around, the voltmeter does not need to be soldered to the PCB, and can be removed when needed.

Design Files

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Update:2025-05-14 09:51:56

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