Electrical hardware design of a little interface - Simulating a Microphone for an Iphone

Cancelled

Hi, We are looking to have an easy hardware interface for plugin to an Iphone. We have a little sensor unit, that provides a clear rectangle signal with 3V peak to peak. What we need now is to give this signal to an Iphone through the microphone mini jack input, as we want to use this signal with an existing Iphone software.

What we know by now is, that we could use the standard microphone, tap on the microphone and the software does recognize this signal. We need someone who is able to provide a very simple way of damping the 3V peak to peak rectangle signal to a signal that is similar to the microphone signal.

Your job is to provide a detailled hardware plan of this interface with wiring plan with which we can use our sensor unit and plug it in to an iphone, as follows:

EXISTING SENSOR WITH 3 CONNECTORS (GND, VCC-3V, SIGNAL-OUTPUT) - Power supply by battery

>>>> YOUR INTERFACE with Mini-Jack (4-poles)

THE GOAL IS THAT YOU PROVIDE AN IDEA THAT IS AS SIMPLE AND CHEAP AS POSSIBLE.

If necessary, we would even be able to send you a sample of our sensor unit. We will be able to forward to hear your quotes.

Skills: Electrical Engineering, iPhone

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Project ID: #4200846

5 freelancers are bidding on average $201 for this job

MikroStar

hi, i can help.i am an electrical engineer with expertise in embedded system design. i can make your signal compatible with the iphone input jack. i hope you are designing a iphone based oscilloscope. i have experienc More

$500 USD in 5 days
(37 Reviews)
6.0
betaenergy

Dear Sir, We are Reserach and Development company whose working area are : -Digital Motor Control -Analog Design -Electronic Design -Power Electronics -PCB design -Embedded system -Matlab -Simulation of ha More

$200 USD in 4 days
(11 Reviews)
4.7
Davelelievre

Hi Retowyss, please could you send me a data sheet for the sensor so I could review its output characteristics.

$100 USD in 5 days
(1 Review)
4.0
ExpressElectro

If you need professional help fell free to contact me. King Regards

$250 USD in 6 days
(3 Reviews)
2.2
thercdude

Hi. I am currently pursuing Electical Engineering at university. I have good experience with Audio Processing. I can generate a 'microphone-like' signal using a few transistors, resistors and capacitors. I worked on so More

$100 USD in 5 days
(0 Reviews)
0.0
karma10

Hello Sir , I can do this job. Please check my P.M.

$55 USD in 3 days
(0 Reviews)
0.0