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1
Misc / New- HS788HB Servo
« Last post by ServoCity on January 11, 2019, 10:32:36 AM »
The Hitec HS-788HB servo is based around the long-time favorite, the HS-785HB. This new model was created with a 25 tooth output spline in order to conform with the majority of the hobby servo market.



https://www.servocity.com/hs-788hb-servo
2
Electronics / Ultrasonic Sensors for grease interceptors
« Last post by Vikram18 on January 09, 2019, 10:22:37 AM »
Hi Team,

We are working on a project to detect the level of oil and fats and sediments accumulated in a grease interceptor.
Usually a grease interceptor will have oil/fat at top layer, clear water in the middle and at the bottom of the tank will be solids or sediments accumulated.
Since I was browsing on internet I came across a topic related to "Affordable Underwater Distance Sensor Problem" topic that was discussed in your forum.
So I believe it will be wise enough for me to post my query regarding selecting a ultrasonic transducer sensor for my application.

At moment we already have a transducer but it has couple of drawback.
Firstly, the after few hours into the liquid, bubbles get accumulated on the face of transducer and this leads to the problem that the energy gets deteriorated even before reaching the bottom of the tank and we don't see the bottom of tank.
Secondly, some times due to the very nature of this grease tanks the transducer gets decoupled from the surface of contact leading it to not getting enough energy back.

I am hoping to receive some suggestions on if there are any better ultrasonic transducers available in market for such application and if there are how do we select which is the best for the application.
I did go through the MaxBotix company's website and not sure if that is what will be suitable or not.

Please provide your valuable feedback.

Thank you
Vikram
3
Electronics / Silent audio jammer ?
« Last post by firefun365 on January 05, 2019, 07:40:34 AM »
Hi,
I search for audio jammer that won't make a noise that disrupt my conversation with someone else.
The purpose: Electrical devices like smartphones and computers in the same room can't record me properly.
Someone told me an electromagnet, but it doesn't mean to me too much.

Thanks for help !
4
Software / Ponyprog error
« Last post by Affan101 on November 27, 2018, 06:19:48 AM »
Hello. I'm trying to use ponyprog to read the eeprom from my original xbox. However, when I click the read button, it says "busy busy or hardware error". I made sure that no devices are connected other than the wire in the serial port. Can someone please help me fix this problem? Thanks for your help!
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Misc / Re: First personal project.
« Last post by Tommy on November 23, 2018, 03:50:52 PM »
While plowing snow has been years of fun.
            picking the snow up and dumping it should like even more fun.

6
Mechanics and Construction / Help with tank robot calculation & DC Motors Selection
« Last post by fandood on November 22, 2018, 02:33:39 AM »
Good Morning Everyone,
   I was upgrading one of my inspection robot my first version was a wheeled one.Now i want to work with tank treads but i can't get to the correct calculation for tread what size of sprockets and how much torque and power needed for the motors especially i intended to go vertically inside a pipe.
I will be grateful if someone helps.
Thanks in advance.
Fando
7
Mechanics and Construction / Re: 120w e scooter motor powered robot
« Last post by Albert.Adderley on November 17, 2018, 09:00:24 AM »
I know the motors will be dropped from 3200rpm to around 320rpm using a timing belt and pulleys
Albert
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Mechanics and Construction / 120w e scooter motor powered robot
« Last post by Albert.Adderley on November 17, 2018, 08:51:04 AM »
Hi I am building a 4 wheel drive tank steer robot with 120w e scooter motors but am stuck on a few design questions.
If I use 2 motors each driving 2 wheels what is the max wheel size I can use.
Also if I use 4 motors what size wheel can I use.
And has this been done before
Albert
9
Electronics / OV7670 on Arduino
« Last post by Taerzik on November 15, 2018, 10:02:35 PM »
Anyone have any experience on using the OV7670?
I have one hooked up to an Arduino and although I've tried using several sets of instructions, nothing seems to work.
I'd go into more detail but right now I'm too tired to think that hard.
I suspect that something in my circuit isn't hooked up quite right, then again, it could be something else.
One thing I've noticed is that none of the instructions I looked at seemed to address the communication speed, so I'm not sure what to set that at.
Any words of wisdom?
10
Mechanics and Construction / Peano Hassel Actuators
« Last post by Taerzik on November 15, 2018, 09:36:41 PM »
A while back Peano/Hassel soft actuators got a little attention but I haven't heard anythign since then.
I'm VERY insterested in making a few but haven't taken the time to place that poker in my fire yet.
Has anyone else taken an interest in the actuators?

So far HASSEL actuators are the closest things I've seen to artificial muscles.
I don't really care about the high speed of actuation so much as the fact that they are soft, cheap, and it seems to be rather simple to do position sensing with them.

If you haven't heard about these before, check them out.
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