NE555 + CD4017 LED Learning Board Kit

Overview

This kit can be useful for understanding the operation of some circuits and you can also practice your soldering skills of SMD components.

Specifications

• Power supply: 3 - 5 V
• Plate dimensions: 74 x 33 mm
• Chip: NE555, CD4017
• The speed can be adjusted from the potentiometer

Circuit Principle

This kit is mainly composed of a clock generation circuit and a decimal counter circuit. It is a self-excited multi vibrator with NE555 as the core. The power supply charges the capacitor C1 through R2, R3, and R4. When C1 is just turned on

When charging starts, the 2 pin of NE555 is still at low level, so the output pin 3 is high. When the power is charged to C1 through R2, R3, R4 to 2/3 of the power supply voltage, the level of output pin 3 is changed from High change

Low, the internal discharge tube of NE555 is turned on, capacitor C1 is discharged through R4, R3, and pin 7 of NE555, until the voltage across C1 is lower than 1/3 of the power supply voltage, the level of pin 3 of NE555 changes from low to low again.

High level. C1 is charged again, and this cycle forms an oscillation. The charging time is: 0.695(R2+R3+R4)C1, the discharging time is: 0.695(R4+R3)C1, adjusting R4 can control the vibration

The output frequency of the oscillator, the NE555 clock oscillation signal is continuously added to the 14 feet of CD4017, and 10 LEDs are connected to the 10 output terminals of CD4017. When the 10 outputs of CD4017

Under the action of the clock signal, the terminals generate high levels in turn, then D1--D10 are lit in turn, thus forming the effect of a water lamp.

Adjust R4 to adjust the flow speed of LED lights.

Don't delay. Buy today.

Add to cart now!