Hi,
I got these piezo films that output from 0 - 140V when I punch it. I want to scale it down to 0 - 2V for the microcontroller ADC. The signal itself is 4ms long.
I first used a voltage divider: 70MegaOhm : 1MegaOhm. I put the scope across the the 1Mega and no voltage drop across that. The scope itself has a 1MegaOhm impedance.
Please help, thanks!
I got these piezo films that output from 0 - 140V when I punch it. I want to scale it down to 0 - 2V for the microcontroller ADC. The signal itself is 4ms long.
I first used a voltage divider: 70MegaOhm : 1MegaOhm. I put the scope across the the 1Mega and no voltage drop across that. The scope itself has a 1MegaOhm impedance.
Please help, thanks!