DollaTek PWM Signal Generator 1Hz -150kHz Dual Mode Generator Adjustable Pulse Frequency Duty Ratio Duty Rectangular Square Wave Module with Case electronics2022 No burn out when testing

No burn out when testing single LED bead with wrong polarity

bowl from micro wave

Asymmetrically designed to create more space

Fujifilm X-T30

DollaTek PWM Signal Generator 1Hz -150kHz Dual Mode Generator Adjustable Pulse Frequency Duty Ratio Duty Rectangular Square Wave Module with Case electronics2022 No burn out when testingDollaTek PWM Signal Generator 1Hz 150kHz Dual Mode Generator Adjustable Pulse Frequency Duty Ratio Duty Rectangular Square Wave Module with Case Parameters: Working Voltage: 3. 3V ~ 30V, with kickback protection. Frequency range: 1Hz ~ 150kHz, accuracy about 1%. Working range: 0 100%, 1% step. Number of pulses: 1 9999 or infinity (display ' ' stands for infinity). Delay output time: 0. 000s 9999s, the minimum can be set to 1ms. positive and negative