Schorschi
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Joined: Thu Nov 22, 2012 9:38 pm

US-100 Sonic Sensor What Voltage Is Echo Pin?

Fri Aug 14, 2020 4:14 am

I know the SRF04, and I think the SRF05, if powered by 5v, the echo pin is greater than 3.3v, so you have to logic step it down to 3.3v, via a divider or such. But what about the newer US-100? The documentation I have found just says the VCC can be 2.4v to 5.5v. But no voltage for the echo pin is referenced. Is the echo pin 3.3v regardless of the VCC voltage?

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joan
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Location: UK

Re: US-100 Sonic Sensor What Voltage Is Echo Pin?

Fri Aug 14, 2020 7:36 am

Can you post the schematics or close-ups of the unit?

I would assume Vout is Vin.

pcmanbob
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Location: Mansfield UK

Re: US-100 Sonic Sensor What Voltage Is Echo Pin?

Fri Aug 14, 2020 11:14 am

According to adafruit the US-100 can be powered from 3V to 5V,
This sensor can run from 3-5V so you don't need any logic level shifters or dividers. Just power from whatever your microcontroller provides
So that suggests to me voltage in = voltage out , power it from 3.3V and the output will be 3.3v no potential divider required,

power it from 5V and the output will be 5V potential divider will be required.

ref..... https://www.adafruit.com/product/4019
We want information… information… information........................no information no help
The use of crystal balls & mind reading are not supported

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