1PCS SMD Component Welding Practice Board Soldering DIY Practice ne w Kit T5Y7

Description

Description
Description&Preview
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Description:
In order to improve the welding skill level of electronic professional students and electronic enthusiasts, the whole SMD design, welding quality can be visually displayed by the light-emitting conditions of 15 LEDs. The circuit is novel, interesting, and the components are complete. The double-sided glass fiber spray tin plate is used to improve the welding level and speed.
1. Board size: 59*48MM
2. Board thickness: 1.6mm
3. Board material: international standard board, all pads are tin-plated, high-strength fireproof and anti-drop material, which can be repeatedly disassembled.
5. The PCB board design is reasonable, and all commonly used SMD components are used.
6. The working voltage of the circuit is 5V
7. This kit contains all the components on the following photos.
Circuit Introduction
This circuit is a light-emitting diode automatic control circuit composed of digital integrated circuits CD4060 and 74HC138. CD4060 internally consists of an oscillator and a binary counter with 10-level output. The external oscillator can be connected to a crystal or RC. The control circuit is connected to RC The oscillation mode is composed of R1-R10 series and C1-C10 series. The resistance of the resistance series is the sum of the resistance values ​​of each resistance. The series connection of the same capacity capacitor is equal to the capacity of a single capacitor/the number of capacitors, 104/10,
After the CD4060 oscillator circuit starts to oscillate, the counter counts the oscillating signal, and each binary bit of the counter continues to flip with the count, thereby outputting a square wave signal with a frequency from high to low on pins Q4-Q14, where Q4-Q10 Drive one light-emitting diode L9-L15 each, so that the 7 light-emitting diodes produce flicker of different frequencies. Q12-Q14 are connected to the input end of integrated circuit 74HC138, 74HC138 is a 3-8 line decoding circuit, and only 1 bit is low level at the same time at the output end. As the data at the input terminal changes, Y0-Y7 turn into low levels in turn, thus forming the effect of a water lamp on L1-L8. After CD4060 count overflows, it will become 0 and count again. So as to realize the automatic control of 15 LEDs.
Package contains
1pcs Lantern Controller Kit
Preview:
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