2Pcs Heart-shaped LED Flashing Electronic Kit DIY Learning Kit
2Pcs Heart-shaped LED Flashing Electronic Kit DIY Learning Kit 2Pcs Heart-shaped LED Flashing Electronic Kit DIY Learning Kit 2Pcs Heart-shaped LED Flashing Electronic Kit DIY Learning Kit 2Pcs Heart-shaped LED Flashing Electronic Kit DIY Learning Kit 2Pcs Heart-shaped LED Flashing Electronic Kit DIY Learning Kit

2Pcs Heart-shaped LED Flashing Electronic Kit DIY Learning Kit

Shipping: Ships within 8-14 business days

Price:

$6.89

Ship From:
  • China Warehouse
QTY:
Min:  2
  • Description

Product Description

2Pcs Heart-shaped LED Flashing Electronic Kit DIY Learning Kit

Feature:

The kit consists of three group LED lights form a heart-shaped pattern. Three groups of three arc tube are controlled by the transistor. After starting three transistor turns on and off, and three groups of LED light-emitting continuous cycle.

How it works:

As you can see from the diagram, 18 LEDs are divided into three groups, each time the power is turned on, three transistor will breakover, but because of differences in components, there will only one transistor will through first, assuming Q1 through the first, then the group LED1 is lit, since Q1 is turned on, its collector voltage drops down so that the left end of the capacitor C2 close to 0V, due to the voltage of capacitor across can not mutations, and therefore also the base of Q2 is pulled to approximately 0V, Q2 is turned off, so connected to the collector of this group which LED2 is off. In this case the high voltage Q2 through the capacitor C3 to make Q3 collector voltage rises, Q3 will be turned on rapidly, LED3 group is lit. Therefore, in this time, Q1, Q3 collector are low, LED1 and LED3 groups are lit, LED2 group turns off, but with the power supply through a charging by resistor R2 to C2, the base of Q2 voltage is gradually increased, and when it exceeds 0.7V, Q2 is turned on, the collector voltage falls, LED2 group is lit. At the same time, the collector dropping voltage of Q2 through the capacitor C3 to reduced the base voltage of Q3, Q3 is turned off, its collector voltage rises, LED3 group extinguished. Next, the circuit in accordance with the above-described cycle, three groups of 18 LEDs will be lit in turn, the same time there are two group of 12 LED is lit. These LEDs are arranged in a heart-shaped cross pattern, continuous loop flashing, to achieve the effect of flow visualization.

Note:

We don't offer any manuals, only has schematic, please note about this before you buy it, sorry for the inconvenience.

Package included:

2 x Heart-shaped LED Flashing Kit