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ICStation DIY Kits NE555 Duty Cycle and Frequency Adjustable Module

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Description

NE555 adjustable pulse generator

NE555 adjustable pulse generator is based on NE555 chip, built into an oscillator circuit.

1. Principle
The multivibrator composed of 555 timer, and waveform as shown in figure After turning on the power supply, power supply VDD through R1 and R2 for capacitance C charging, when Uc < 1/3 VDD, oscillator output Vo = 1, discharge tube.

After the Uc charge to 2/3 or more VDD, oscillator output Vo flip to 0, the discharge tube conduction, make the discharge end (DIS) grounding, capacitance C through R2 to discharge, bring down the Uc.

When reduced to a third or less VDD Uc, oscillator output Vo and flip into 1, discharge tube and as of right now, make the discharge end (DIS) not grounding, power VDD through R1 and R2 and recharging the capacitance C, made up from a third VDD Uc two-thirds VDD, trigger and flip, so the cycle, so as to get continuous variation on the output side Vo oscillation pulse waveform.

Pulse width 0.7 R2C TL material, determined by the capacitance C discharge time;TH = 0.7 (R1 + R2) C, is determined by capacitance C charging time, pulse period T material TH + TL

2. Directions for use
The input voltage: DC5 ~ 12 v.

The amplitude in: 4.2 V to 11.4 V

3. Functions and Diagram

List of components:

The serial number

Component

Label

Footprint

Value

Number

1

Resistance

R1

AXIAL-0.4

1.5K

1

2

Ceramics capacitors

C1,C2

RAD-0.1

104

2

3

Ceramics capacitors

C3

RAD-0.1

102

1

4

Glowing red LED 5 mm

D1

DIP

 

1

5

NE555

U1

DIP-8

 

1

6

8P IC seat

     

1

7

Potentiometer

VR1,VR2

   

2

8

50V 100UF Electrolytic capacitor

C4 ,C5

RB.15/.3

100UF

2

9

50V 1UF Electrolytic capacitor

C6

RB.1/.2

1UF

1

10

Row needles

     

0.5

11

Jumper cap

     

1

12

PCB

     

1

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Quantity5+10+30+
Price$1.35$1.29$1.15

Feedback

By
Rating: [4] 4 of 5 Stars! Date Added: 2017-11-19 11:12:18
Great little module to learn soldering, quite easy to build as it has only a few components and a very cute little PCB (far far away from cheap raw common DIY PCBs). It's my first DIY module I've soldered :). Jumper meaning on PCB itself would have been great, as well as more documentation on how to use it, as this module is a lot more than just a learning one, it can be actually useful for various vehicles related display like blinked set of LEDs to improve safety at night. Hope to see more ICStation made modules soon !
By
Rating: [5] 5 of 5 Stars! Date Added: 2016-05-29 16:17:18
Very cheap and it works perfect.
By
Rating: [5] 5 of 5 Stars! Date Added: 2015-06-12 02:27:43
Only missing thing is the description of the jumper block

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ICStation DIY Kits NE555 Duty Cycle and Frequency Adjustable Module
$1.33
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