We are looking for someone to build 6x DTMF Tone Generators.
The device will be used to make on screen selections and to make calls using a video conferencing system. The video conferencing system's microphone which sits on the desk in front of its users must be able to hear and recognise the tones generated by this device. The DTMF tone generator will be positioned on the desk within 15cm of the microphone.
Our current solution is holding an iPhone next to the microphone and using the iPhone keypad to generate the DTMF tones.
The unit must meet the following criteria:
- Battery Powered (9V, AA, or AAA)
- Must have an on/off switch
- Must be able to produce audible tones, i.e. must contain a speaker
- Have a simple functional keypad to activate tones (similar to telephone keypad)
- Generate tones for numbers 1-9, 0, *, and # using the standard DTMF keypad frequencies
- Fully enclosed, with simple access to battery compartment.
- Dimensions under 15cm Wide x 15cm Long x 10cm Height
Attached is an example image of how we envision the completed unit to appear.
Bu iş için 11 freelancer ortalamada $524 teklif veriyor
Hello Sir. I can do what you need with quality and reliability. Please read more about me: I work with electronics circuits (digital, analog, mixed and of power) and embedded products with microcontrollers since 199 Daha Fazla
Hello there. I can have these shipped within two weeks. I plan to use a 5889 16 pin chip as the operative IC. What I would like from you to start would be half of my fee released for parts after a short discussion and Daha Fazla
hi, i am an electrical engineer and i have an experience in designing electronic circuits, PCB layouts and microcontroller based embedded systems. i can design your project with efficient output response. i will us Daha Fazla
I can design fabricate and send you the item, I will show the functionality through Skype, one trouble for me is the expense and hassle in sending item to Australia a paid UPS/Fedex from your side will help. Anyway th Daha Fazla
I have experience in building electronic devices........................................................................
Greetings! I would be happy to make your project I can ensure for you high quality work I'm working lecturer at a university. To check my work quality YOU can see some of my tutorials and lectures for Daha Fazla
I plan to use two AA batteries, an AVR, a standard piezo speaker, (possibly an ADC), and laser-cut acrylic for the enclosure. Most of the time it will take to make this project will be the delivery of the circuit bo Daha Fazla
Hi, I am an Electronics Engineer. I have worked for many companies and now a consultant. I have gone through your project and found it is in my scope of work. As I have experience in designing of products like this Daha Fazla
Hello，I think your project is simple, but it is a bit of trouble to finish it. My plan is to take 12 days to complete the project. Doing PCB layout needs 2 days, Making boards and boxes 7 days, 2 days of debugging, I w Daha Fazla