A place users can post their projects. If you have a small project and would like your own dedicated place to post and have others chat about it then this is your spot.

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By Barnabybear
#62852 Hi, I used some old stock I had kicking about in the workshop KC7783R's which is a 5 to 12V PIR, I used a 1K /2K resistor divider on the output line to give 3.3V.

http://www.electronics123.net/amazon/da ... c7783r.pdf

EDIT: Another thought. Which ESP module or development board ae you using? Some have a 10K pull up on CH_PD, that could change things, I used an ESP8266-01.
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By jhumphr
#62865
Barnabybear wrote:Hi, I used some old stock I had kicking about in the workshop KC7783R's which is a 5 to 12V PIR, I used a 1K /2K resistor divider on the output line to give 3.3V.

http://www.electronics123.net/amazon/da ... c7783r.pdf

EDIT: Another thought. Which ESP module or development board ae you using? Some have a 10K pull up on CH_PD, that could change things, I used an ESP8266-01.


Your PIR is different, but I'm not seeing anything that would cause this. Hmm... And yeah I'm using the ESP-01 as well
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By Barnabybear
#62942 Hi, mine was 5V and powered from 5V with a 1k / 2*1k voltage divider on the output. If your powering this:
https://www.mpja.com/download/31227sc.pdf
from 3.3V your not going to get a good output.

Looking at the above data sheet and this one:
https://cdn-learn.adafruit.com/assets/a ... SS0001.pdf

It looks like you can bypass the voltage regulator by feeding 3.3V to the:
'H: Repeat Trigger' pin on the board. This can be the same supply as the ESP as long as it can supply 300mA (ESP) plus the 65mA the PIR needs.