GK-EK-ARROW, GeeekÜs Triple Arrows DIY LED Kit is a straightforward kit for practicing one's soldering skills. Upon completion and powering, the three arrows will light up one at a time. With the use of an NE555 timer and a CD4017 counter, each group of 5 LEDs take turns lighting up in a sequence according to its assigned BC547 transistor.
Refer to the attached manual for complete soldering instructions.
This board is powered via three AAA batteries (4.5V) for which the case is included. The batteries are sold seperately.