NE555 + CD4017 LED Blue Flashing Lights for 9V 12V
brand new and
This suite adopts simulation light circuit made with NE555 and CD4017,the blue LED and LED flashed alternately according to the The multivibrator composed of NE555 will have a certain frequency of oscillation send to CD4017 decimal counter distributor,in order to count. When 3 5 pulses arrive Q0 output level in turn,blue LED flashes 3 times output level in turn.Red LED flashes 3 times,blue LED flashes again when 11,13,15 pulses come,blue and LED flashes alternately circulatory,so as to like the alarm lamp.Change the size can change the oscillation period, thus changing the LED shining speed, the whole circuit DC9-12V can be worked.
flashing light and blue flashing light form a board separately with the main board through the stamp hole.If you need to install to other place separately or increase the distance,you should cut through the stamp hole,then with the mother board by two wires.Please pay attention to the direction of LED when installing,especially the direction of L11 and L12.The and controls with the brightness of light,you can change it appropriately ,the is 10-100 ohm.
Quantity:1Set