10Pcs 5V-12V NE555 Adjustable Frequency Pulse Generator Module For Arduino Smart Car
1. On-board chip NE555 for Arduino .
2. A single channel output, the output duty cycle square wave is about fifty percent.
3. Onboard adjustable resistance, resistance can be controlled to adjust the output frequency
4. Working voltage: 5 -12V
5. With power light.
10 x NE555 modules