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NE555 frequency adjustable pulse generator module
1.On board NE555 chips.
2.Single-channel signal output, the output square wave duty ratio is about fifty percent .
3.On board adjustable resistance, adjustable resistance can control the output frequency
4.On board power light.
5.Working voltage: 5 ~ 12 v.
6.The size of the board: 29 (mm) x12 (mm).