Analog Electronics, 555 timer as VCO and a board

$30-250 USD

Terminado

Publicado

hace alrededor de 11 años

$30-250 USD

Pagado a la entrega

Hi, We want to make a simple device. It's a sensor connected to a 555 timer acting as a VCO. There is also a simple NPN transistor which is sometimes turned on. The whole device is operated using usb power from a cell phone and the audio input/output of the cellphone. The audio turns the NPN transistor on. The audio records the output of the 555 timer. We also need a board designed. It should take less than a week to complete the project. We will discuss it in more detail if you have a nice bid. -Brian

Electrical Engineering

PCB Layout

ID del proyecto: 4140388

Información sobre el proyecto

15 propuestas

Proyecto remoto

Activo hace 11 años

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Adjudicado a:

@MIKY4227

Hi is easy see portfolio for samples

$50 USD en 1 día

4,9

(46 comentarios)

6,4

15 freelancers están ofertando un promedio de $103 USD por este trabajo

@MikroStar

hi, i can help.

$200 USD en 5 días

4,8

(68 comentarios)

7,6

@pcbdcs

Hello, I can do this.

$90 USD en 7 días

4,8

(122 comentarios)

6,7

@Davelelievre

Hi Brian I believe I can help you with your project

$100 USD en 5 días

4,9

(27 comentarios)

6,2

@shahbaz1980

Hi, i need to know followings. 1. what frequency VCO will produce? 2. amplitude of output signal of VCO? 3. Duty cycles?

$30 USD en 2 días

4,5

(50 comentarios)

6,9

@technofreakz

I have experience in designing PCB with CadSoft Eagle.

$70 USD en 5 días

5,0

(3 comentarios)

3,9

@nevorek

Simple task

$50 USD en 0 día

4,3

(2 comentarios)

3,8

@beautifulangels

hi i am electronic engineer and expert at analogue electronics i can help you

$100 USD en 7 días

5,0

(9 comentarios)

2,9

@ExpressElectro

Hello sir. I have master degree in electronic, and this is pretty basic project. I can fully finish you'r project for several hours. I offer you cheap and reliable design, and i guarantee you for quality of design. Also i will fully support you to the end of project. Feel free to contact me. Bye

$60 USD en 1 día

4,8

(3 comentarios)

2,8

@aki542

Hi,I can help u.

$70 USD en 7 días

3,8

(2 comentarios)

2,2

@parmarjp

I can help you with this project.

$250 USD en 15 días

4,5

(3 comentarios)

1,6

@FlyingPigeon

You will get best results!

$100 USD en 15 días

0,0

(0 comentarios)

0,0

@tryitout

This project shouldn't even take a week. I have all the parts laying around, I can put it breadboard and give you a video showing it working and then proceed to a PCB layout using eagle. It's sad how many engineering graduates these days might suffer with such a project!

$130 USD en 6 días

0,0

(0 comentarios)

0,0

@uetian2013

It's pretty good project i am also looking for this kind of project. I have very strong grip on power electronics device. i can do that. For further satisfaction check my profile.

$170 USD en 6 días