NE555 frequency adjustable pulse generator module

1,onboard NE555 chips.

2, single-channel signal output, the output square wave duty ratio is about fifty percent .

3,onboard adjustable resistance, adjustable resistance can control the output frequency.

4,onboard power light.

5,working voltage: 5 ~ 12 v.

6,the size of the board: 29 (mm) x12 (mm).