DIY Electronic Kit 1801 SMT SMD Component Soldering Project Practice Suite FM Radio Transmitter Board Module Welding Learning

Product features:
full SMD design, welding quality can be visualized by the 15 LED's luminous situation;
novel and interesting circuitry with a complete range of components;
the use of double-sided glass fiber spray tin plate, can be used as an introductory welding practice, practical training, examinations, competitions, etc.;
the provision of WORD version of the instructions for use, to facilitate flexible modification;
Board material: international standard plates, pads are all tinned, high-strength fireproof and fall-proof materials, can be repeatedly disassembled, PCB board design is reasonable, the use of all commonly used SMD components.

Product parameters:
Circuit operating voltage: 5V
Board size: 59 * 48MM
Board thickness: 1.6mm

Circuit Description:
This circuit is composed of digital integrated circuit CD4060 and 74HC138 light-emitting diode automatic control circuit, CD4060 internal by an oscillator and a 10-stage output binary counter, oscillator external can be connected to a crystal or RC, the control circuit is connected to the RC oscillation mode, there are R1-R10 series and C1-C10 series composition, the series of resistance The resistance value of the series connection is the sum of the resistance value of each resistor, the same capacity capacitor series connection is equal to the capacity of a single capacitor / number of capacitors, 104/10.
After the CD4060 oscillation circuit is activated, the counter counts the oscillation signal, and each binary bit of the counter is continuously flipped with the count, thus outputting a square wave signal from high to low frequency on pins Q4-Q14, where Q4-Q10 each drive a light-emitting diode L9-L15, making these seven light-emitting diodes produce different frequencies of flashing. q12-Q14 is connected to the input of the integrated circuit 74HC138. Integrated circuit 74HC138 input, 74HC138 for 3-8 line decoding circuit, in the output at the same time only 1 bit is low. The CD4060 will count again when it overflows to 0. Thus realize the automatic control of 15-way LED.

15-way color light controller SMD welding practice kit has the following 10 functions, training, examination, competition

preferably:
Fun - the circuit is installed and add 4-6V electricity is 7-way binary counting lights + 8-way running lights, novelty and fun.
Training - a total of 76 components (excluding the row of pins), 240 solder joints, easy to train speed.
Comprehensiveness - the circuit has 8 categories of common components, to be able to familiarize with the use of more components.
Practicality - the circuit has a specific function, Huma is an electronic work.
Simulation - equipped with instructions for use, can be used as a reference for competitions, selection, examinations, etc.
Economical - can be repeatedly desoldered and used to improve the use rate.
Flexibility - each component is numbered, no label parameters, you can flexibly adjust the parameters.
Intelligent - the circuit can be powered on to intelligently determine whether the welding is normal, the failure point has a light indication.
Innovation - the circuit design is novel, moderate difficulty, original for the poly zero electronics, please do not counterfeit peers.
Technical - the circuit has a unique working principle, provide a complete schematic diagram, with 10 test points, convenient for various tests, conducive to improving theoretical level.

Friendly reminder:

Contains components due to batch problems may vary in color, does not affect the use, mind carefully consider!
DIY kits (loose parts) installation and production requires a certain professional basis and hands-on skills, the process of making the risk of damage, loose parts do not provide after-sales service after installation, please choose carefully!

Product list:
Circuit contains the following components:
1, 0603 chip capacitors 10
2, 0603-4P chip resistance 10
3, SOP package integrated circuit 2           
4, 4, 0805 SMD LED 7
5, 0805 chip resistors 15                 
6、1206 chip resistors 10
7, 0603 chip resistors 14                 
8, 3528 SMD white LED 8
9, 2.54 test row of pins 10 (can not be installed, the kit does not provide)
10, a special double-sided PCB board