NE555 & CD4017 LED Licht Jäger Sequenzer Follower Scroller Modul zum Selbermachen Kit rot
Description: Kit Model: LSD-10 Supply Voltage :3 - 4 .5 V PCB size: 88 * 25mm PCB thickness: 1.0mm Circuit: The kit mainly by the clock generation circuit and decimal counter circuit constitute By NE555 core self-excited multivibrator power through R2, R1, VR1 to charge the capacitor C2, when C2 just start charging, U1's pin 2 is low, so the output end of the 3 foot was high power by R2, R1, VR1 C2 charges to 2/3 of the supply voltage, the output level of 3 feet from high to low, U1 internal discharge tube is turned on, capacitor C2 via VR1, R1, U1 pin 7 discharge , less than 1/3 of the supply voltage until the voltage across C2, U1's level of 3 feet from the low to high level. C1 again charging, so the cycle formed oscillation. The charging time is: 0.695 (R2 + R1 + VR1) C2 discharge tim.
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