Circuit design for LEDs on a timer


I’m looking for someone who can help me with designing and providing documentation for a project I’m working on.

I’m looking to make something similar to what kids’ light up toothbrushes do. If you think you can provide the design and documentation to accomplish this which I could hand over to a manufacturer to be mass produced, I’d love to talk!

These are the requirements:

Small form factor

Powered by batteries (which can be replaced)

LED light

LED is activated by pressing a small button

LED us on a timer and turns off after 20 seconds

Provide documentation so I can provide to a manufacturer

I’m flexible with the price!

I basically want what’s shown in the attached pictures but with a timer to shut the LED off after 20 seconds.

Thanks in advance.

Skills: Electronic Design, Electrical Engineering, Circuit Design, Circuit Board Layout

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About the Employer:
( 0 reviews ) Federal Way, United States

Project ID: #21544122

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Hello Friend, I have 15+ years experience in electrical engineering. Having worked on automotive products, I have a good knowledge about digital LED driving for efficiency and sleep. I would recommend a design based More

$140 USD in 3 days
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31 freelancers are bidding on average $165 for this job


Hi I am experienced electronics engineer with more than 11 years of experience in such projects. I have worked a lot with timers and stuff. I can do it for you. Before I can give my good offer I would like to discuss More

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We are a team of Electrical and Electronics engineers and we are Excellent in the following areas: • Embedded C Programming. • VHDL/Verilog • Microcontroller like Arduino, Raspberry Pi, FPGA, AVR, PIC and STM32. • ID More

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(29 Reviews)

Hello. I think it would be better to add a small MPU of the ATtiny series than to add something like the 555. Regards.

$200 USD in 7 days
(27 Reviews)

I am an Electrical Engineer with a masters degree I have high proficiency in Electrical Engineering, HVAC, LTE system model, Thermal system design, FPGA, Verilog / VHDL, Matlab/ Simulink, Microcontroller, Modeling, op More

$30 USD in 1 day
(4 Reviews)

Dear client, Nice to meet you. I have been working as a firmware and hardware designer for 6+ years. I had developed several similar projects using the various microcontrollers such as STM32F1/2/3/4/7xx, PIC16/18xx, Wi More

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(8 Reviews)

Dear Customer, I have over 20 yea of experience in electronics design. As you can see I have lot of led and battery related projects. [login to view URL] [login to view URL] I can provide schematic, pcb de More

$250 USD in 7 days
(3 Reviews)

Dear you, I recomment you using ic 555 for this. I will be cheap and easy to design. We can discuss more on chatting. Brg!

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(8 Reviews)

Hello I am an Electrical Engineer did MS in Electrical Engineering (Control System) as well. I have 4 years of Experience as well, also have 11 IEEE conference publications and 3 Journals with good impact factor My More

$83 USD in 1 day
(15 Reviews)

i can design this circuit using 555...PCB designing will be using KICad i will provide gerber output with KiCad project files

$100 USD in 7 days
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Hello, i have read the details provided..please contact me to discuss more on the project deadline and some other few things

$150 USD in 5 days
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Hello. i have deveoped the digital clock and stopwatch using timer of [login to view URL] i am very confident to your project. if u contact me, i will send immediately animation file. so i am gonig to talk to u about my experience More

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Hello, I am an embedded systems engineer experienced in microcontrollers and pcb design. I have developed many LED driver systems before. your project seems very straightforward. I can provide you all you need plus low More

$200 USD in 5 days
(2 Reviews)

Hello, I am an electronic engineer. I would like to perform this design for you. If you send me a message we can talk about further details. Best regards.

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Hello, I can provide design and documentation for your project as you want. I have checked all PNG files and it is skill for me. can we chat about ur project?

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Hi my Professional Aim is: (Services then Solutions then Satisfactions) I hope you are [login to view URL] an experience in this field from last 5 years i am sure i can do it perfectly with in a time and budget Able to deliver More

$30 USD in 5 days
(2 Reviews)

Hi. Im electrical engineer with 3 years of experience in design (both schematics and pcb). I will try my best to assist with your project.

$50 USD in 3 days
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Hello, I've carefully checked your job posting and I'm very interested in forming a good relationship with you as an experienced engineer. I've been working in this field for 11+ years so far and have excellent experie More

$250 USD in 3 days
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