Audio output amplifier / converter -- 2

Closed Posted 7 years ago Paid on delivery
Closed Paid on delivery

Requirements:

1. Connect the engineered device to the mobile phone's jack output

2. The device has to have an analog button to amplify the signal (like the volume button on a radio). Amplify the voltage, range 10V-100V.

3. Another button / switch to change the sinus sound waves to square waves. (on or off)

The power source of the device is a small battery (Li-ion, AA or 9V).

The output is also a jack socket (mono).

Electrical Engineering

Project ID: #11156645

About the project

9 proposals Remote project Active 7 years ago

9 freelancers are bidding on average $325 for this job

seshupower

Hi, I am a post graduate power electronics engineer and having very good industrial experience of 8+ years in R&D and project development. I am excellent high frequency transformers design, circuits design, Regulated More

$444 AUD in 10 days
(37 Reviews)
5.8
aqeel96

Hi, I am an Electrical Engineer and expert in Amplifier Designing. I have previously done a project related to multistage amplifier as well on freelancer as can be seen from my profile. I have designed and manufactured More

$277 AUD in 3 days
(51 Reviews)
5.7
Davelelievre

I have over 35 years experience as an electronic design engineer, please see my profile for more details The current price and timescales are only place holders to allow me to communicate with you Do you want just a More

$388 AUD in 10 days
(11 Reviews)
5.4
ashish2614

we will help you with your project we will give you full tested circuit which can be reliable and fully tested , usually we take long duration in your case 18 because we test the circuit before giving to our users, hat More

$244 AUD in 20 days
(1 Review)
2.8
sheikhfarhanm

I am an electrical engineer with considerable experience in electronics and pcb design. I am confident that i can provide you the requisite design. Contact me and we can discuss it further

$155 AUD in 3 days
(3 Reviews)
2.5
alokpugalia

Greetings, Interesting application indeed. You are looking for an amplification > 1000, controlled by some kind of potentiometer so that you get your wheel control (similar to volume control). In addition you want a More

$660 AUD in 6 days
(0 Reviews)
0.0
MElizabethp

Hello! Nice to meet you partner, I am an electronic engineer, I can do this job for you of many ways. For more details please contact me by chat.

$388 AUD in 10 days
(0 Reviews)
0.0
ravipanchal11

I'm Ravi good at this kind of work. Having 4+ years of professional experience! Good communicator; Easily understand customer's need. You'll get your work on time with high quality is my motto! Just give a project and More

$250 AUD in 7 days
(0 Reviews)
0.0
ahmad5857

Hi sir wehave developed many audio processing circuits for clients. we are the team of expert engineers with several years of experience related to embedded systems and electronics and programming. We offer you ou More

$120 AUD in 15 days
(1 Review)
0.0