# DIY | Adjustable Timer Using 555 & Potentiometer

8,834

86

DIY | Adjustable Timer using 555 & potentiometer

### Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

## Step 2: Making Video

You can watch the making of the video by the clicking the video linked in this step or continue reading to make your own timer

You Can Subscribe To My YouTube Channel By Clicking HERE

## Step 3: Components Required

1. Push Button

2. 555 Timer IC

3. Red & Green Led

4. 100uF / 25 volt capacitor

5. 0.01uF capacitor

6. 2.2 Mega Ohm resistor

7. 10k Ohm Resistor

8. 330 Ohm Resistor

9. 220 Ohm Resistor

10 470k Ohm Potentiometer

11. 3 Pin PCB male & Female connector

12. PCB Board

13. Wires

14 Battery & Battery Cap

15 Hot Glue Gun

16 Insulation Tape

## Step 4: Circuit Diagram

In my design i have used RED LED for output, But if you need real practical application i would suggest adding a

5 volt relay or a 5 volt buzzer so that it can perform some other operation once achieving the time.

## Step 5: Construction

Mount & connect all the components as per the circuit diagram.

Note :

1. as mentioned in the previous step in the image 3 i have used RED LED for output, But if you need real practical application i would suggest adding a 5 volt relay or a 5 volt buzzer so that it can perform some other operation once achieving the time.

2. I have used 3 pin connector & attached it to 470k potentiometer as shown in the image 5. The reason for doing this is, so i can change the potentiometer for different timing. Using 470k pot i would achieve time range between 5 to 10 minute. To achieve lower time range using lower potentiometer will help.

3. to achieve higher time range you need to increase the value of the electrolytic capacitor which is connected to the pin 6 of the 555 timer (shown in the image 4)

4. This circuit achieves only a approximate value. To achieve a exact timer i would recommend using programmable or micro controller based timer(ex: Arduino)

## Step 6: Finished Images

1st Image - Finished Board

2nd Image - Timer Running

3rd Image - Output

Testing begins @ 2 minute mark

-------------------------------------------------------------------------------------------------------------------------------------------

Do you want to support my videos?
If Yes, Please browse and buy things from my Amazon Store. This way I get a small commission which will help me produce more videos. Please use the link to visit my store : http://goo.gl/gKjns4

You can also contribute to me on Patreon using the link : http://goo.gl/gKjns4

Amazon US :

555 Timer - http://amzn.to/2az9Y96

470k Pot : http://amzn.to/2aldcMV

Push Button : http://amzn.to/2a8NbNp

Resistors, Capacitors & Others Things : http://amzn.to/2a2CzU8

Soldering Kit : http://amzn.to/29RyXjJ

Wires - http://amzn.to/29Y1kwt

Battery - http://amzn.to/29Y0Shu

PCB Board - http://amzn.to/2abRXw7

Insulation Tape - http://amzn.to/29YNZax

Hot Glue Gun - http://amzn.to/29Y2BU8

Amazon IND :

555 Timer : http://amzn.to/2a3UYR7

470k Pot : http://amzn.to/2aOz3KQ

Capacitors, Resistors & Other items - http://amzn.to/29GbUwT

Push Button : http://amzn.to/2a3VhLP

Hot Glue Gun - http://amzn.to/29HEslT

Soldering Kit - http://amzn.to/29P00wv

Wires - http://amzn.to/29GdPBl

Battery - http://amzn.to/29HEp9E

PCB Board - http://amzn.to/29Ged2O

Insulation Tape - http://amzn.to/29HGzpJ

PCB Board Connectors - http://amzn.to/29P6wU4

-----------------------------------------------------------------------------------------------------------------------------------------

You Tube Channel : https://goo.gl/ctc8l9

## Recommendations

• ### Large Motors Class

13,254 Enrolled