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undefinedFor the budding engineer! This product contains 5 separate projects to hone your soldering skills. Each kit will contain all the necessary components, Labeled PCB board and set of instructions. You will receive the following five kits. 1. Wheel of fortune light display Circuit principle: the circuit is mainly composed of a pulse generator and a decimal counter circuit. The pulse generator is composed of a NE555 and a peripheral component of a multi harmonic oscillator, when the button Q1 is pressed, S1, NE555 3 pin output pulse, the 10 output of the CD4017 turns output high level driver 10 LED turns to light. After the button is loosened, and, because of the existence of a capacitor C1, Q1 does not immediately stop, with the drop of the voltage at both ends of the C1, Q1 through program gradually weakened, three feet of the output pulse frequency slow, led moving frequency slows. At the end of the C1 discharge. 2. LM358 Breathing light kit Breathe light, just as its name, Leds in the circuit under the control of the gradual change from light to dark, light, and then from andao feels like breathing. Widely used in digital products, computer, audio, automotive and other fields, have very good visual adornment effect 3. 16 tone electronic music box 16-tone box under your control, arbitrarily issued 16 kinds of interesting analog sound, both an electronic toy can also be used as a doorbell or alarm. 4. Voice controlled melody light This project allows you to create an interesting sound powered LED display. The LED lights will change intensity and speed dependant on the sound received by the sensor. 5. 5V electronic LED hourglass The suite adopts 1.6mm double layer PCB, and the circuit consists of 57 pieces warm white LED. Under the control of MCU program.

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DIY Soldering practice project box bundle 5 kits in 1

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