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Help me to make a talking multimeter

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makri

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Hello

Anybody can help me to make a talking multimeter. It is for my friend he is blind


Makri
 

micronta voice meter

first how he will keep the prob at a particular point if he blind(iam serious)
 

micronta multimeter 22-220a

To make a "talking" multimeter you will need a speech module and a microcontroller ..
Here is an example:
"Connecting the SP03 Speech Module to the PICAXE-28x"
**broken link removed**

Regards,
IanP
 

speaking multimeter

He is 100% blind, but he is winding ceiling and tables Fans. thank god , that is why I am spending my valied time for him.
 

multimeter mcu

I would suggest you: instead of speaking the measured value, your equipment could make beeps in different tones to represent the digits. For example:

23.4 ohms:
two beeps at 300 Hz
pause
three beeps at 400 Hz
pause
one beep at 1kHz (decimal point)
pause
four beeps at 600Hz

It will simplify your circuit (you don´t need the speech module)
Of course, it is slower than speaking the measured value. But it works too.
 

Talking Multimeter

thats grate, i asked it because multimeter is a general testing instrument used for all measuring applications(even dangerous high voltages).

talking is a good option but designing wise it is complex as you have to make all the primary numbers in voice store it in eeprom at low bit rate and play it according to the measured values.(you can design it with a 8051 mcu a EEPROM and a 8 bit DAC)

or you can try the mores code sound output as it is simple and gives good results(it needs a MCU and a amp( as you can generate the beep in the mcu itself)).
 

Talking Multimeter

You can use PC as multimeter via let say LPTscope alike ADC - this will greatly reduce your efforts .
Just an idea .
 

Re: Talking Multimeter

I think you'll need a multimeter with an RS232 or USB connection to a computer. It will also need some kind of interface that allows you to program it. Then write the program, probably in VB and use Microsofts Speech SDK to set up a command and control system that would allow the user to hear data and give commands. Probably the best bet would be to use a digital scope with a PC link like the Instek digital line. But be prepared, this is a ton of work. Usually when people ask me for this kind of stuff they think it can be done in a few nightrs.
 

Talking Multimeter

That was a good idea only thing it will not be a pordable one as you need a pc to understand and generate sound. from his hint i got another idea you can use the normal multimeter with rs232 output with open protocol(well documented so that we can use a 8051 MCU with rs232 interface to understand the message from the multimeter and play sounds stored in the EEPROM to the DAC.
 

Re: Talking Multimeter

i think u should use apr 9301 re recordable voice otp manufactured by aplus india.
for multiple o/p's use api840

http://www.aplusindia.net
 

Re: Talking Multimeter

First of all, I want to commend you for your efforts. Secondly, at one time, there was a talking multi-meter made, it is Micronta Auto Range Voice Meter. You might want to check that out. My husband bought his in 94, but they may still manufacture something like that. Also, you might want to look under talking multi-meters, or voice meters on the net.

the reason I know about this, is that my husband is in the audio electronics hobby, and he is totally blind. Plese message me and keep us aprised of your efforts.

Take care.

mdermott
 

Re: Talking Multimeter

Makri

Here is another way you could do this-

You can get a PC to interface with a DVM with communications capabilties, like RS232. This information can be read into some programme that has a text to speech capabilty. One such program is Microsoft Excel using the Speak function. You could also use the speech recognition built into MS Office (and hence Excel as well) to change DVM functions if your DVM allowed this to be done remotely.

You can find details of all of this (although not together) in my book "Excel by Example: A Microsoft Excel Cookbook for Electronics Engineers " ISBN 0750677562.

For simplicity and availability, I used the Radio Shack 220-0812 DVM.

-Aubrey Kagan
 

Re: Talking Multimeter

I need to find a digital multimetercouple .
It must have the following ddescriptions:
- traceable NIST certificate
- temp ( -40 to 150 degree celsius)
- humidity ( 0 to 100)
- length ( 2 meters)
:D
 

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