1PCS NE555 pulse frequency, duty cycle adjustable module,square/rectangular wave signal generator,stepping motor driver

NE555-Blue Features: 100% Brand new and high quality! On-board chip NE555. A single channel output, the output duty cycle square wave is about fifty percent. Onboard adjustable resistance, resistance can be controlled to adjust the output frequency. Best choice for yourself or your friend.You will not be disappointed! Specifications: Color: Blue Working voltage: 5-12V Size: 29 (mm) x12 (mm) NE555-Red 1, Size: 3.1CM * 2.2CM 1, the main chip: NE555; 2, Input voltage: 5V-15VDC. 5V power supply, the output current can 15MA around; 12V power supply, the output current can 35MA around; 3, the input current: 100MA 4, the output amplitude: 4.2V V-PP to 11.4V V-PP. (Different depending on the input voltage, the output amplitude will be different) 5, the maximum output current: 15MA (5V power supply, V-PP greater than 50%), 35MA (12V power supply, V-PP greater than 50%) The scope of this module: 1 is used as a square wave signal generator generates a square wave signal used for experimental development. 2 to drive a stepper motor for generating a square wave drive signal. 3 adjustable pulse generated for use by MCU. 4 adjustable pulse generation, control circuitry associated. Advantages: 1, the output with LED indication, there is no output straightforward (low LED volume, high LED off frequency is relatively low, the LED flashes); 2, the output level selectable frequency range, the output frequency is more continuously adjustable; LF file: 1Hz ~ 50Hz IF file: 50Hz ~ 1kHz High-frequency file: 1KHz ~ 10kHz HF file: 10kHz ~ 200kHz 3, the output duty cycle can fine-tune, duty cycle and frequency is not separately adjustable, adjusting the duty cycle will change the frequency 4, the output frequency is adjustable; Period T = 0.7 (RA +2 RB) C RA, RB is 0-10K adjustable; Low profile when C = 0.001UF; IF stalls C = 0.1UF; High-frequency file C = 1UF; HF stalls C = 100UF, so the frequency of the waveform buyers can own calculations