Timer relay module circuit

I'm using this timer module :

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But the product has problems and error, it can start without trigger, the decimal can jump unpredictable, etc.

So I decided to make my own timer relay module circuit.

It should have:

- Input Voltage DC 12V

- Use the same relay as the above product

- Memory Safe (the more the better)

- Time Delay Setting : 0 to 999.9 seconds

- Prefer 3 setting button. Start - Up - Down (other button configuration is ok too).

- 2 mode :

- Mode 1: Press Switch -> Relay ON (as set as the set value)

Note: Value that is safe is the time for the relay to be ON)

- Mode 2: Press Switch -> Relay ON - OFF - ON ~ repeat

Note: Three setting values: Relay ON time, Relay OFF time and how many times it should repeat.


- The circuit should be reliable, durable and heavy-duty use.

- Use only easy to find parts.

- The price of the above module is just $2 - $3. So, the circuit should be economical (doesn't meant that it should be $2-3 too). A little more expensive is ok, but not too much.

Skills: Electronics, Microcontroller, C Programming, PCB Layout, Circuit Design

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About the Employer:
( 4 reviews ) siantar, Indonesia

Project ID: #24587758

24 freelancers are bidding on average $189 for this job


Hi i am experienced embedded system designer with more than 15 years of experience. I have read the details and have a few questions. Please get in touch to discuss it further. Please review my profile to see the feed More

$140 USD in 7 days
(241 Reviews)

Hello sir, I have experience in designing electronics circuits and can program all kinds of microcontrollers. You can discuss your project with me in chat and we can move on right away. I will design your product based More

$150 USD in 10 days
(44 Reviews)

Greeting There , I could absolutely help you with your Timer relay module circuit PCB/PCBA project i am Auto-desk ACI certified on Eagle CAD , i am sure that i the PERFECT contractor for your project . below sample o More

$210 USD in 7 days
(47 Reviews)

For more details inbox me so that we can discuss in detail. For more details inbox me so that we can discuss in detail. For more details inbox me so that we can discuss in detail.

$140 USD in 7 days
(52 Reviews)

Hello. Im designing different electronics devices, mostly based on avr, arm MCUs and boards with them like arduino, stm-discovery etc. (autopromotion^)) Hi. I can design such thing for you. It will be same actualy - More

$400 USD in 7 days
(54 Reviews)

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(14 Reviews)

I have more than 8 years experience in embedded and electronics circuit . and i have already worked on relay . so i can do your job within a time limit with your satisfaction.

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(9 Reviews)

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(3 Reviews)

PCB design for your timer - $30 /2-3 days Prototype assembly - $70 /14 days Software programming and testing - $60 All the source files and manufacturing exports and firmware will be provided

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I am a Ph.D. student in Electrical engineering. I have a lot of experience with designing and programming electronic circuits. I am well versed in the programming of PIC, AVR and ST microcontrollers. In this project, d More

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