PWM Pulse Signal Generator Module – Dual Mode PP1K & PP2K
PWM Pulse Signal Generator Module – Dual Mode PP1K & PP2K
LOTHYE PP1K & PP2K Dual-Mode PWM Pulse Signal Generator
Take precise control of motors, LEDs, solenoid valves, and more with the LOTHYE PP1K and PP2K dual-mode PWM pulse signal generator modules. Whether you need a continuous square-wave signal or a fully programmable timed pulse sequence, these compact modules deliver professional-grade performance in a package measuring just 79 × 43 × 30 mm. Made in Mainland China.
Which Model Is Right for You?
- PP1K – Signal-level output (up to 30 mA). Designed to feed signals to external motor drivers, stepper motor controllers, servo systems, electric grippers, and robot arms. Cannot directly drive high-current loads.
- PP2K – High-power MOS-switch output (up to 8 A). Can directly drive LEDs, DC motors, and solenoid valves without a separate driver board. Note: waveform is only visible on an oscilloscope when a load is connected.
Two Powerful Operating Modes
PWM Mode (Continuous)
Set frequency and duty cycle independently. The module continuously outputs a square wave — ideal for motor speed adjustment, LED brightness dimming, and general PWM control applications. Factory defaults: 1 kHz frequency, 50% duty cycle. The "%" symbol on the LCD confirms PWM mode is active.
PULSE Mode (Programmable)
Set positive pulse width, negative pulse width, power-on delay time, and total pulse count — all independently. Outputs a precise number of pulses (1–9999) or runs in an infinite loop. Perfect for controlling stepper motor revolution counts, solenoid valve cycling, timed load switching, and automated switch fatigue testing. No "%" on the display confirms PULSE mode.
Key Features
- Wide input voltage range: 3.3 V – 30 V
- Frequency range: 1 Hz – 150 kHz (~1–2% accuracy)
- Duty cycle: 0–100% in 1% steps
- Pulse count: 1–9999 or infinite (displayed as "----")
- Delay output time: 0.000 s – 9999 s (1 ms minimum resolution)
- Positive/negative pulse width: 0.000 s – 9999 s (1 ms minimum resolution)
- PP1K signal load capacity: < 30 mA | PP2K load capacity: < 8 A (MOS switch)
- Output amplitude equals supply voltage
- Built-in start/stop button; supports external switch for remote ON/OFF control
- PP1K includes anti-reverse polarity protection
- 5.08 mm terminal block wiring for easy connection
- All settings retained after power-off
- Compact size: 79 × 43 × 30 mm
Typical Application Examples
- Motor speed control: PWM mode at 20 kHz, 60% duty cycle → smooth DC motor speed regulation.
- LED dimming: Adjust frequency and duty cycle to set precise brightness levels.
- Solenoid valve cycling: PULSE mode, positive width 0.600 s, negative width 0.200 s, infinite loop.
- Delayed start: PULSE mode, delay = 5.000 s, then infinite on/off cycle.
- Precise stepper motor positioning: PULSE mode, set exact pulse count to control number of revolutions.
- Switch fatigue / reliability testing: Automate thousands of ON/OFF cycles to verify equipment durability.
Technical Specifications at a Glance
| Parameter | PP1K | PP2K |
|---|---|---|
| Working Voltage | 3.3 – 30 V (with anti-reverse protection) | 3.3 – 30 V (observe polarity) |
| Frequency Range | 1 Hz – 150 kHz (±1%) | 1 Hz – 150 kHz (±2%) |
| Duty Cycle | 0–100%, 1% step | 0–100%, 1% step |
| Pulse Count | 1–9999 or infinite | 1–9999 or infinite |
| Delay Output | 0.000 – 9999 s (1 ms min) | 0.000 – 9999 s (1 ms min) |
| Output Load Capacity | < 30 mA | < 8 A (MOS switch) |
| Output Amplitude | = Supply voltage | = Supply voltage |
| Dimensions | 79 × 43 × 30 mm | |
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Frequently Asked Questions
Q: What is the difference between the PP1K and PP2K PWM signal generator modules?
A: The PP1K outputs a low-power signal (up to 30 mA) intended to drive external motor driver boards, stepper motor controllers, servo amplifiers, or other signal-level inputs. It also features built-in anti-reverse polarity protection. The PP2K uses a high-power MOS transistor switch output rated up to 8 A, so it can directly drive DC motors, LEDs, and solenoid valves without a separate driver. Both modules share the same dual-mode (PWM + PULSE) functionality and the same frequency/duty cycle range.
Q: How do I switch between PWM mode and PULSE mode on the module?
A: The module powers on in PWM mode by default (a "%" symbol is shown on the LCD). To switch to PULSE mode, press and hold the SET button for more than 6 seconds until the "%" symbol disappears from the display. To switch back, repeat the long-press. All parameters are stored in non-volatile memory, so your settings are preserved after power-off.
Q: Can I set a timed delay before the output starts?
A: Yes. In PULSE mode, press and hold the SET button for approximately 2 seconds to enter the pulse count and delay time settings interface. Use the P+/P− buttons to set the delay time (0.000 s up to 9999 s, with 1 ms resolution) and the N+/N− buttons to set the number of output pulses (1–9999 or infinite). Press SET again to return to the main pulse interface, then press ON to begin — the module will wait the specified delay before emitting pulses.
Q: What input voltage range is supported, and is reverse polarity protection included?
A: Both modules support a wide input voltage range of 3.3 V to 30 V, making them compatible with common power supplies including 5 V, 12 V, and 24 V systems. The PP1K includes built-in anti-reverse polarity protection. The PP2K does not include this protection, so ensure correct polarity before connecting power to avoid damage.
Q: What is the maximum frequency this PWM generator can output?
A: Both the PP1K and PP2K support a frequency range of 1 Hz up to 150 kHz. The PP1K has approximately ±1% frequency accuracy; the PP2K is approximately ±2%. For DC motor speed control applications, a frequency of 20 kHz is typically recommended to keep switching noise outside the audible range.