Detail NE555 Adjustable Frequency Pulse Square Wave Generator Module
Specs: 1. NE555 chip onboard 2. Onboard adjustable resistance, resistance can be controlled to adjust the output frequency 3. Working voltage: 5 – 12V 4. Onboard power light. 5. Minimum – 50% duty cycle, 3.7 Hz 6. Maximum – 98% duty cycle, 1.3KHz 7. Size 26mm x 13mm x 14mm