NE555 Pulse Sensor

Performance

• Input Voltage: 5V-15VDC. The output current is approximately 15mA when powered by 5V, and it can be around 35mA when powered by 12V;
• Input Current: >= 100mA;
• Output Amplitude: From 4.2V V-PP to 11.4V V-PP. (Different input voltages will result in different output amplitudes)
• Maximum Output Current: >= 15mA (with 5V power supply, V-PP > 50%), >= 35mA (with 12V power supply, V-PP > 50%)
• Output with LED indicator (low level, LED on; high level, LED off; low-frequency, LED blinks);
• Output frequency range can be selected as follows: LF file: 1Hz ~ 50Hz IF file: 50Hz ~ 1kHz High-frequency file: 1kHz ~ 10kHz HF file: 10kHz ~ 200kHz
• The oscillation period T = 0.7 (RA + 2RB) C (RA adjustable from 0-10K, RB); Low frequency: C = 100uF; Intermediate frequency: C = 1uF; M-H frequency: C = 0.1uF; High frequency: C = 0.001uF;

Note:

Please turn off the circuit before changing the frequency