Led Kit Ne555 + Cd4017 Led Lights Electronics Diy Parts Electronic Kits #3979403

US $2.87

Shanghai, China
Jun 9th

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led kit ne555 + cd4017 led lights electronics diy parts electronic kits Description: 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 time: 0.695 (VR1 + R1) C2, regulator VR1 can be controlled oscillator output frequency, U1 clock oscillation signal constantly applied to the U2 to pin 14, U2's 10 output terminal 10 is connected with LED, when U2's 10 output terminal to produce a high level in the clock signal under the action of rotation, D1 - D10 are sequentially lit, thereby forming a flowing light effect. Adjust VR1 to adjust the flow rate of the LED lights. Principle of Circuits The suite is mainly composed by the clock generation circuit and decimal counting circuit. The self-excited multivibrator is with NE555. Power which charged for Capacitor C2 will go through R2,R1 and VR1. U1's PIN2 is under low level when C2 starts charging. Then the output terminal of PIN3 is under high level. And it turns to a low level when C2 has been charged with 2/3 of the supply voltage. Capacitor C2 starts discharging via the PIN 7 of VR1,R1 and U1 when U1 internal discharge tube is on. U1's PIN3 level change from low to high when the voltage of C2's each end is less than 1/3 of the supply voltage. And the C1 is recharged. In this cycling way, the oscillation is formed. Power Charge Time:0.695(R2+R1+VR1)C2 Power Discharge Time:0.695(VR1+R1)C2 Oscillator output frequency can be controlled by adjusting VR1. U1 clock oscillation signal apply to the U2's PIN14 constantly. And U2's 10 output terminals are connected with ten LEDS. D1 - D10 are lighted by turns when U2's 10 output terminals generate a high level under the effect of clock signal. At last the water light is formed. * Adjust the flow rate of the LED lights by adjusting VR1 Circuit Diagram: ekwhyon sijpidk qyklede MPI Buyer should pay within 7 days after purchase. We only accept payment via PayPal. Our team focuses on providing high quality products with reasonable price and tries its best to keep transactions as simple as possible. Please be confident of and enjoy your shopping here! Please feel free to contact us via eBay message system or email.

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	Unbranded
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