302.213.6708 | 8 THE GREEN, DOVER, DE 19901
This kit creates a frequency with the 555 timer and sends it to CD4017
The blue and red LED flashed alternately according to the pulse.
FREE shipping from China warehouse 2-3 weeks to the US
Europe and rest of the world 3-4 weeks.
0-30V 2mA-3A DC Regulated power supply DIY
18650 Battery Charge Shield
2 channel relay module for Arduino.
2 pcs 9V battery power cable for for Arduino