Learn Electronics for Beginners
The best way to learn electronics, or to start electronics as a hobby, is to start building circuits. You do not need to know how the circuits work or what the parts do at first. By building circuits, you will learn about different electronic parts and components, how to read circuit diagrams, as well as about basic tools and electronic principles.
Component list
PCB board-----------------------------1
Multicolor LED----------------------- 10
1uF capacitance----------------------1
20k resistance------------------------2
CD4017---------------------------------1
Electret microphone----------------1
100uf capacitance-------------------1
2m resistance-------------------------1
16pin Sockets-------------------------1
9014-------------------------------------1
407---------------------------------------1
Instructions----------------------------1
Tips for use:
1. The resistance value should correspond to the resistance value marked on the board one by one.
2. The LED long pin is the positive pole, and the hole near the white dot on the board is the positive pole.
3. The electrolytic capacitor has a long pin positive pole, and the hole on the side with a slash on the board is the negative pole.
4. The notch direction of the chip base and chip should be consistent with the notch direction indicated on the board
5. Pay attention to the positive and negative poles of the power supply. If you connect them reversely, the chip will be burnt out.
6. The color position of LED can be placed at will.
Working principle
Q1 and its peripheral circuits form a simple amplifier circuit. Mic converts the sound signal into an electrical signal, which is coupled to Q1 through C3 for amplification. A voltage signal with high and low changes is formed at the collector of Q1, and the voltage with sufficient amplitude is sent t