Find Jobs
Hire Freelancers

Circuit design for battery powered sensor devices

$20-30 SGD / hour

已完成
已发布将近 10 年前

$20-30 SGD / hour

Looking for someone to hire potentially for several projects. Needs good english skills. Prefer someone in similar time zone (GMT+8). Will do preliminary project to gauge expertise and ability to communicate. If interested, please also include what your availability would be. Would like to start ASAP. Ability to chat over skype at times is helpful as well. First two projects: Design amplification circuit the takes 0-40mV to 0-3.3V minimizing noise Create a circuit that uses microcontroller to generate +/- 1V square wave from a single 3.3v source
项目 ID: 5899523

关于此项目

22提案
远程项目
活跃10 年前

想赚点钱吗?

在Freelancer上竞价的好处

设定您的预算和时间范围
为您的工作获得报酬
简要概述您的提案
免费注册和竞标工作
颁发给:
用户头像
Hi, The first two projects look straightforward enough. I am a very experienced electronics engineer based in New Zealand (GMT + 12). I have strong analogue skills, I have done lots of low level measurment design and also some radio receiver work so I understand the factors affecting accuracyof measurement. Your budget is a bit lower than I would normally charge but as it looks like the requirements are realtively simple I have dropped my rate accordingly. Though my rate may be a little higher, my knowlledge and experience means I can generally do things quicker than someone with less experience. I have some history on freelancerand also on elance under Marc Palmano Kind regards Marc skype: palmanz
$44 SGD 在10天之内
5.0 (13条评论)
5.1
5.1
22威客以平均价$26 SGD/小时来参与此工作竞价
用户头像
Hi, I'm an Electronics Engineer. If that is suitable for you we can discuss project details at 6pm (GMT+10) via skype mike.gengin.
$27 SGD 在10天之内
4.6 (5条评论)
4.9
4.9
用户头像
Hello, Have a Great Day, I can help you. I have more than 10 years of Experience in R&D sector. My expertise are in Electronic circuit designs, Embedded system design, Firmware development for PIC, AVR, Arduino and Micro controllers from other families. I can provide full support in Prototyping and mass production of the hardware. Apart from this i have also gained much experience in Analog Electronics as well. Please feel free to contact. Best Regards, Shahbaz.
$27 SGD 在10天之内
4.9 (19条评论)
4.8
4.8
用户头像
Hi, I am a professional electronics engineer with expertise in embedded systems and power electronics. Please see my profile, portfolio and previous industry experience. Have designed and implemented several projects. Have very good english communication skills, with same time zone with you as I am just in the Philippines. My skype is cloudlinker. Just a quick question, what deliverable do you require? (simulation only? schematics? PCB lay-out? or actual prototype?) Hope to touchbase with you. Best Regards, Ian
$25 SGD 在10天之内
4.3 (8条评论)
4.9
4.9
用户头像
Dear Sir. I can design such a devices. Because this schematic seems to be simple, it is possible to simulate it using Multisim or Altium Designer. Do you need a pcb design too? I have a deep experience in the metrology & sensors areas, so I can help. Regards, Anton.
$30 SGD 在7天之内
4.9 (4条评论)
4.3
4.3
用户头像
A proposal has not yet been provided
$20 SGD 在20天之内
5.0 (15条评论)
4.2
4.2
用户头像
Hello I am in the time zone GMT+2 close to you. This are my expertise: I have 8 years of product design in the automotive industry. I am an expert in: - Dc - Dc converters - USB charging - accelerometers, gyroscopes - GPS and GSM - LCD Displays - LED power calculation As a Layouter I have 5 Years experience. I am an expert in : - Power Dissipation Calculation - EMC Rules - Impedance Calculation - Manufacturing Rules I have made Layout for ARM processor. Work also with BGA footprint. I have done projects even on 10 layer. So I know how to build a layer stack up. As Layout and Schematic software I am an expert in Eagle, PADs, Zuken. As Simulation software for the Schematic I used LTSpice. If you want more information feel free to contact me.
$20 SGD 在35天之内
5.0 (4条评论)
3.8
3.8
用户头像
hi, i am an electrical engineer and i have a great experience in designing electronic circuits like , analog circuits, microcontrollers etc. i have also designed a battery powered sensor device in which i used voltage, current, temperature, humidity, infrared, ultrasonic range sensors etc. your first two projects are very easy to design. Please contact me for further details and information. Note: i will be available on freelancer from 10pm - 3am according to your ( GMT +8 ) time. Thanks, Rizwan
$28 SGD 在10天之内
4.7 (4条评论)
3.4
3.4
用户头像
Hello..Im Electrical-Electronics Engineer with Software Developement..I have great experience working as a .NET Developer and as a ASP Developer throughout my career. I will benefit you and your company if hired by you. I have exceptional skills in the areas of .NET, ASP and C Programlama. I can deliver projects on time and to a high standard. I also have experience working with C# Programlama. I am ready to be hired by you now.
$24 SGD 在5天之内
4.8 (6条评论)
2.5
2.5
用户头像
I'm an electronics engineer with 5 years of experience in electronics r&d. I have expertise in ELECTRONICS CIRCUIT DESIGN, MATLAB and LABVIEW and a masters degree in electronics and telecommunications. I definitely can help you out with this project. CHECK OUT MY PORTFOLIO. Please send the details. Thanx.
$20 SGD 在5天之内
4.5 (3条评论)
1.6
1.6
用户头像
Hi. Thank you for inviting me to your project. I can start your project asap. I have experience to work with microcontrollers such as AVR. Also I'm in your time zone. I like digital signal processing too. and what is the aim of this circuit? I mean are they industrial project or academic ones? I'm here to have conversation about your project to show how much I have skills about them. With the best regards
$25 SGD 在10天之内
5.0 (1条评论)
1.3
1.3
用户头像
Hi, I have electronics engineer qualification. I have experience in electronic devices R&D. I can do your projects. Thank you, Slavi.
$27 SGD 在5天之内
5.0 (1条评论)
1.1
1.1
用户头像
Hi, I have read and understood the project guideline, so you can trust my sincere indulgence both in quality and time frame. I have done similar projects in the past. I will like to use my experience to serve you better. If you will give me a chance, I will ensure that you're satisfied. I'm sure we can work together. Please reply, let’s discuss further. A trial will convince you. Thanks
$21 SGD 在35天之内
0.0 (0条评论)
0.0
0.0
用户头像
I am at GMT+5.30 (INDIA) and would like to help you out to design the schematic, PCB layout as well as the firmware for the micro controller. I will use PIC series micro controller for the requirement. As you have not mentioned the frequency of the square wave signal that you are in need of so details will be provided after getting the full info. Thanks
$35 SGD 在15天之内
0.0 (0条评论)
0.0
0.0
用户头像
A proposal has not yet been provided
$22 SGD 在1天之内
0.0 (0条评论)
0.0
0.0
用户头像
Dear sir, I can do this project easily. Because I have done a project like this before a month. I have good knowledge about opams and microcontrolers. I'm an engineering student. You can give me the project without any doubt. If you have any questions , feel free to ask me. Thank you
$20 SGD 在3天之内
0.0 (0条评论)
0.0
0.0
用户头像
一个有效的提议尚未被提供
$27 SGD 在1天之内
0.0 (0条评论)
0.0
0.0
用户头像
A proposal has not yet been provided
$28 SGD 在10天之内
0.0 (0条评论)
0.0
0.0

关于客户

SINGAPORE的国旗
Singapore, Singapore
5.0
15
付款方式已验证
会员自10月 14, 2010起

客户认证

谢谢!我们已通过电子邮件向您发送了索取免费积分的链接。
发送电子邮件时出现问题。请再试一次。
已注册用户 发布工作总数
Freelancer ® is a registered Trademark of Freelancer Technology Pty Limited (ACN 142 189 759)
Copyright © 2024 Freelancer Technology Pty Limited (ACN 142 189 759)
加载预览
授予地理位置权限。
您的登录会话已过期而且您已经登出,请再次登录。