AC711 vs AC712 voltage

[menotuu]

The AC711 has a Supply Voltage of 3min 3.3typ 5.5max V. The AC712 has a Supply Voltage of 4.5min 5typ 5.5max V.

All of the IO pins of Adafruit Feather M0 Basic run at 3.3V.

on pcb there is a Ac712 printed but connected with 3.3V. how can this work? in the sketch there is AC711 written.

I ask, because on my setup I never can bring up to glow the glow plug with AC712 supplied with 3.3V, and maybe its the fault on my setup. but if I cut the 3.3v supply and supply the AC712 with the 5v from converter, the output would be too high for the IO pins of the Adafruit Feather M0 Basic??

Have you installed a AC711 or AC712?

[SimonRafferty]

I used an AC712. I originally intended to use a 711, but they were not available at the time due to Covid.

Despite the rating, I found it worked fine, only losing a little accuracy - but for the purpose of this, that didn't matter.

It may be that devices from different manufacturers behave differently? Mine is made by Allegro.

On Mon, 8 Jan 2024 at 14:17, menotuu @.***> wrote:

The AC711 has a Supply Voltage of 3min 3.3typ 5.5max V. The AC712 has a Supply Voltage of 4.5min 5typ 5.5max V.

All of the IO pins of Adafruit Feather M0 Basic run at 3.3V.

on pcb there is a Ac712 printed but connected with 3.3V. how can this work? in the sketch there is AC711 written.

I ask, because on my setup I never can bring up to glow the glow plug with AC712 supplied with 3.3V, and maybe its the fault on my setup. but if I cut the 3.3v supply and supply the AC712 with the 5v from converter, the output would be too high for the IO pins of the Adafruit Feather M0 Basic??

Have you installed a AC711 or AC712?

— Reply to this email directly, view it on GitHub https://github.com/SimonRafferty/Webasto-Heater---Replacement-Controller/issues/11, or unsubscribe https://github.com/notifications/unsubscribe-auth/ADE3J4MCEMGKT43WUF3OKFTYNP5V7AVCNFSM6AAAAABBRQ2ON2VHI2DSMVQWIX3LMV43ASLTON2WKOZSGA3TANJVGMYTINA . You are receiving this because you are subscribed to this thread.Message ID: <SimonRafferty/Webasto-Heater---Replacement-Controller/issues/11@ github.com>

--

Simon Rafferty imdb.me/simonrafferty https://www.imdb.me/simonrafferty

Tel: 07774956461

[menotuu]

and what version 20A or 30A? I have 30A thats maybe to much (low output) but allegro too. ACS712TELC.

at 5V Vcc: 20A sensitivity typical 100 mV/A 30A sensitivity typical 66 mV/A

[SimonRafferty]

Mine is 20A - but it makes little difference. It's not being used to measure an accurate, absolute temperature - just a difference between hot & cold. In the code, you can set the flame threshold value - above which it considers the burner to be hot. It will need adjusting to suit your sensor.

This is best achieved by looking at a plot of the value as you manually start & stop the heater. [image: image.png] This is mine from Yesterday. I have a threshold value set as 90 which seems to work.

On Wed, 10 Jan 2024 at 11:58, menotuu @.***> wrote:

and what version 20A or 30A? I have 30A.

20A sensitivity typical 100 mV/A 30A sensitivity typical 66 mV/A

— Reply to this email directly, view it on GitHub https://github.com/SimonRafferty/Webasto-Heater---Replacement-Controller/issues/11#issuecomment-1884714344, or unsubscribe https://github.com/notifications/unsubscribe-auth/ADE3J4IV54GT2NXC64K4YHDYNZ66ZAVCNFSM6AAAAABBRQ2ON2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQOBUG4YTIMZUGQ . You are receiving this because you commented.Message ID: <SimonRafferty/Webasto-Heater---Replacement-Controller/issues/11/1884714344 @github.com>

--

Simon Rafferty imdb.me/simonrafferty https://www.imdb.me/simonrafferty

Tel: 07774956461