NO, It's not AK-47, but it's an AK9750!
This is an IR sensor with I2C I/F from AsahiKASEI and the module was from Strawberry Linux
It has 4 IR sensors to be used detecting human or some warm object.
I wrote a sample program with CY8CKIT-044.
schematic was quite simple
UART, I2C and one interrupt from AK9750 and one from SW2 to switch mode between interrupt and polling.
As the 4 sensors covers area like below (the picture is from the datasheet)
I decided that it's a time to use my previous sample "vt100"
So I located the values of each sensors in diamond like positions.
The TeraTerm log looks something like below
I tried to locate an asterisk in the middle to reflect the value relation of IR1 and IR3, IR2 and IR4,
not quite good index, but ... well... I hope it's better than nothing.
The distance between the sensor and the object and the position of the object matters.
As far as I played with this, distance of 5cm~10cm seemed to be easy to see the value characteristics.
This Arm is surely for close quarters.
I tested about up to 1.5m and it was detecting my movement.
It was the limit of the length of my arm.
Then I left the sensor on my desk and moved away,
at least 2m~3m seemed to be inside the range,
the detecting area got smaller though.
As I didn't want go outside of my office window,
I stopped there.
本サンプルは CQ出版 インターフェース 2019年6月号に
I contributed this sample project to a Japanese technical magazine
"Interface" June/2019 edition.