8A signal generator/pulse generator module

This great little module can be programmed to produce a PWM modulated output with variable duty cycle and frequency. It also has a pulse mode, where it will produce one or more pulses and then stop until retriggered, or it can produce a continuous train of pulses. Pulses are adjustable in width and spacing.

Specifications
Supply voltage: 3.3-30VDC
Frequency range: 1Hz-150kHz
Frequency accuracy: 2%
Duty cycle range: 0-100%
Output Current: 8A (max)
Number of pulses: 1-9999 or continuous
Delay time: 0.000-9999s
Pulse width: 0.000-9999s
Time accuracy: 1ms
Output amplitude: Same as supply voltage
Working temperature: -20-85°C
Working humidity: 0-95%RH
Dimensions: 79 x 43 x 26mm

Part number ZK-PP2K, instructions are here.