Rectangular pulse generators feature independent frequency and duty-cycle adjustment - EDN
Square Wave Pulse Generator Circuit using CD4047
Pulse Generator kit, Arc Igniter Coil Module, DC 3-5V DIY Electronic Lighter High Voltage Pulse Generator Kit for Cigarette Lighter, Power Converters: Amazon.com: Tools & Home Improvement
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PWM Pulse Signal Generator Circuit Using LM358 Op-Amp IC
NE555 Pulse Generator Pulse Starter Duty Cycle and Frequency Adjustable Module DIY Kit Oscillator Square Wave Signal Generator - AliExpress
NE555 Pulse Generator Pulse Starter Duty Cycle and Frequency Adjustable Module DIY Kit Oscillator Square Wave Signal Generator: Amazon.com: Industrial & Scientific
555 Pulse Generator. Simple Circuit. - YouTube
Pulse Generator Pulse Starter Duty Cycle and Frequency Adjustable Module DIY Kit Oscillator Square Wave Signal Generator : Amazon.in: Industrial & Scientific