5Pcs NE555 Pulse Generator 555 Timer Module Single-Channel Signal Output Adjustable Frequency Rectangular Wave Signal Generator for MCU Learning with Dupont Cable electronics_new_releases_Aug2023 HARMLESS Believed to have been

HARMLESS Believed to have been around for thousands of years

and then move the head of thermometer near to the ac voltage

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not limited

Cable Length:5M/2M/3M/4M/8M/10M(any other length you need

5Pcs NE555 Pulse Generator 555 Timer Module Single-Channel Signal Output Adjustable Frequency Rectangular Wave Signal Generator for MCU Learning with Dupont Cable electronics_new_releases_Aug2023 HARMLESS Believed to have been5Pcs NE555 Pulse Generator 555 Timer Module Single Channel Signal Output Adjustable Frequency Rectangular Wave Signal Generator for MCU Learning with Dupont Cable Specification: 1. Onboard NE555 chip 2. Single channel signal output, the output duty cycle is about 50% square wave 3. On board adjustable resistance, adjusting the resistance value can control the output frequency 4. Onboard power indicator 5. Working voltage: 5? 12V 6. The output