I am new to electronics and I’m using an bi directional motor driver to power two 18 V motors. I’m using a bi directional motor driver to get it to reverse, but I can’t seem to figure out how to use this IC. The part number is NTE 7042. Can somebody please tell me how to make this part work??? My main problem, is that I don’t know what C on is.
Here is the url to the pdf of the part http://www.nteinc.com/specs/7000to7099/pdf/nte7042.pdf
Thanks
bachslap:
I am new to electronics and I’m using an audioboard to power two 18 V motors. I’m using a bi directional motor driver to get it to reverse, but I can’t seem to figure out how to use this IC. The part number is NTE 7042. Can somebody please tell me how to make this part work??? My main problem, is that I don’t know what C on is.Here is the url to the pdf of the part http://www.nteinc.com/specs/7000to7099/pdf/nte7042.pdf
Thanks
I’m no pro either, but I can’t fathom how you would connect up an audioboard (any links to an example of what model this is?) with 2 motors for it to work. Audio implies an AC signal, meaning voltage and current goes negative and positive a couple of hundreds or thousand times a second. The motors are, I assume, DC motors. (again, specs please, other than voltage as it means nothing in this context other than being possibly quite bulky) They usually run one way or the other. They can turn both ways, but usually not reverse within the same second due to inertial and mechanical effects (load-torque/friction). Also, the audio-amplification section of the audioboard probably filters out any DC-component of the signal that you are trying to feed through. Please explain what you have in mind with this audioboard.
By all means, provide schematics of what you intend to do.
The part you show is a H-bridge device. By setting the digital inputs in the way according to the table in the document, it powers the transistors (or mosfets) to direct the current one way, or the other, or not at all, or both outputs short-circuited to ground.
My main problem, is that I don’t know what C on is. …
Me neither. I blame it on the datasheet. Not clear enough. Doesn’t say what it does or is for. Is it a clock input? Digital or analog? Some sort of capacitive input for whatever use? Enable inputs are usually called E-something.
A little sleuthing finds that a BA6418N is a replacement for the above part.
http://www.classiccmp.org/rtellason/chipdata/ba6418.pdf
From that datasheet it seems that CON is an output enable, active low.
Yes, they are two DC volt motors. Yes the part i am using is an H - bridge. But my problem is that i cant figure out how to use this H - bridge. Im really stuck and ive tried applying voltages in every possible logical position and i still cannot figure out how to make it work. It seems that the part has one too many inputs, the C on button doesn’t seem to be necessary. It seems to have no use to it.
Any ideas of how to make this work???
Also, i made a typo (AutoCorrect’s fault) Im using a bi directional motor driver, not an audioboard… sorry
Yes, look at Figure 2 in the PDF file @ the link I gave above. Apply voltages (0v/>2v) on pins 1 and 3 and you'll get motor action per the truth table; running CW, running CCW, coasting or braking.bachslap:
Any ideas of how to make this work???
You’ll need 1 per motor for independent action and are limited to <15V and 0.7A to the motor … which might be a bit weak for your motors when loaded down.
Two things:
First, I am using an arduino board to power my logic pins, so is the digital output of HIGH for the arduino pins high enough in voltage to supply the two volts needed?
Second, This part also has the Con pin. How should I wire this pin up so that i can get it running?
bachslap:
Two things:First, I am using an arduino board to power my logic pins, so is the digital output of HIGH for the arduino pins high enough in voltage to supply the two volts needed?
Both datasheets show that the voltage on the inputs needs to be at minimum 2 volts to be considered a High (ViH 2v min.) This should be easily surpased even by a 3.3v Arduino. But the ground pins on both sides (Arduino and H-bridge) would need to be at the same potential(i.o.w. have the same voltage and be connected with a low resistance path). It’s hard to tell from your pictures if this is the case, if proper ground connections are made.
Second, This part also has the Con pin. How should I wire this pin up so that i can get it running?
Again, as you can see on the second datasheet drawing “Application example”, connect it to Ground. As Mee_n_Mac said in a previous post, it is active low. Meaning it enables, or activates the output, when this input is made to have a voltage close to ground (must be below 0.8 volt, ViL)
We built a similar project. However, we installed an Android device onto a RC car and used an IOIO board to control it autonomously. Here is the preliminary result:
I’ll try this out soon and post my results. Thanks for everyone’s help thus far
I connected the Con pin to ground and nothing happened.
bachslap:
I connected the Con pin to ground and nothing happened.
Well the other inputs need to be set too. How did you set them?
I connected the arduino’s pins 3 and 9 to the Iinput pins then the ground pin between those two back to the arduino ’ s ground. I ran the negative of a 6V battery to the ground and the Con pins then I ran the positive of the same battery to the Vcc pin. I connected the motors terminals to outputs 1 and 2.
I’d post a picture, but II’m not sure how to attach one
And what was the Arduino code ?
Let’s make this simple given you’re using a 6V battery to start with. Forget the Arduino for the moment, disconnect it. Connect pin3 of the driver to 6V+. Connect pin1 to batt- (aka GND). Connect the battery as you described above, 6V+ to pin6. Pins 2 and 5 to GND. Connect the motor btw pins 7 and 9. Now touch pin8 (CON) to GND and the motor should run.
bachslap:
…I’d post a picture, but II’m not sure how to attach one
Press quick reply button, then “Full editor” button.
Then below the message editing windows there are 2 tabs, one named “Options”, the other is to “upload attachment”. With that you can upload images or other files to Sparkfun. Then a link will show up to the files once you posted the message.
Here’s a photo
Let’s make this simple given you’re using a 6V battery to start with. Forget the Arduino for the moment, disconnect it. Connect pin3 of the driver to 6V+. Connect pin1 to batt- (aka GND). Connect the battery as you described above, 6V+ to pin6. Pins 2 and 5 to GND. Connect the motor btw pins 7 and 9. Now touch pin8 (CON) to GND and the motor should run.
Ok it works like this!!! But now how can I run it with my arduino???
I’ll let Mee_n_Mac handle this further.
But I advise you to strip your wires a bit shorter. Some of the copper leads on that breadboard come awfully close to eachother! It only takes a little nudge on the wires for them to make contact, and then … ZAP!! Also, colored wires helps to keep the wires and their functions apart.
Oh noooooo ..... [/MrBillVoice]Valen:
I’ll let Mee_n_Mac handle this further.
@OP - why don’t you post your code and “we” will take it from there.