Tecwyn Twmffat

excellent! please let me know ow you et on.

What error were you getting?Can you try this in terminal:arecord -f S16 -r 384000 -d 30 -c 1 --device=plughw:r0,0 /home/new.wav????

I think all you might need to do is change the sampling frequency in record_and_filter.sh, but probably not - just use it as it is! Do you already have the mic?

Interesting .....

Looks like a very nice bat detector :)

That's not a bad idea Paul, NCS would be great for deep learning which I'll be implementing some time soon (this year), but on a Jetson Nano.

Looks like a very nice bat detector :)

Thanks Galt !!

Thanks!

Thanks and good luck to you too.

I do actually 'pet' my bees. I sometimes stroke them with my finger. I once even helped hatch a queen once by helping her munch her way out of her crysalis (not with my teeth though!). Some people who keep chickens just throw in the food and water and dont even bother to cuddle them. My bees ARE domesticated and ..... generally .... dont sting me - they're deliberately bred NOT to sting people. If they were wild animals, I would be covered in stings. Very rarely, they do get into a bad mood, but generally they are lovely, friendly and fascinating creatures.

Excellent build!How do you get it to move smoothly? I've built a similar thing to track insects, https://hackaday.io/project/161581-wasp-and-asian...but the Python Adafruit Raspberry Pi library seems to shift the servos by one whole degree at a time which makes it really rough. Did you have to tweak the arduino library at all and if so, what did you do?Also, what do you think is the actual resolution of these type of servos, in degrees? .... Thanks!

Good comment! There are two reasons for using the LoRa module :1. Very long range (up to 200km) and 2. Very low power consumption, especially when compared to WIFI modules.Like you mentioned, antenna is important and getting it up high may be necessary to get line of sight.Using an amplifier is (I believe) illegal on my island and output power is limited. If I was somewhere where I could amplify signal I'd use a Qorvo QPL9065 low noise amp and appropriate band pass filters to add 20 dB to signal strength.

WIFI wont give the range needed. Lora has up to 200 km with true line of sight.

Thanks - I'm hoping to win a mug!

WIFI wont give the range needed. Lora has up to 200 km with true line of sight.

WIFI wont give the range needed. Lora has up to 200 km with true line of sight.

Thanks for reply. I can see that the bot itself has some issues, but proof of concept for using the tags is the main thing I'm interested in. I'm not sure what 95% means as I don't know the spacing of the tags. What do you think the accuracy is in mm? Maybe +- 5 mm?

Nice - what kind of accuracy do you get?

The results are very good - everything on it works fine. I'm not quite sure what the hardest part is yet - I'm trying to get the torque balanced on the drive wheels at the moment.Distinguishing weeds would be done by another separate 'off the shelf' module which would then provide coordinates of a grid to the main controller, so not really too complicated, hopefully.It's true that intricate projects get side-lined here - a few reasons: This site is aimed primarily at young people who need simple projects to learn on and intricate projects are too intimidating also the site moderators wont understand the project so will default to the garbage bin.

Yes I reckon it has the intelligence of a bacteria.

You can use my code!

Thanks ! Just waiting for a motor upgrade to arrive tomorrow to test it all out in real life.

I'm just doing it right now:https://www.instructables.com/id/WEEDINATOR-Part-4-Differential-Steering-Geometry-C/

Wow thanks! I'll try and save a bottle of sloe gin for you, current batch is 3 gallons so it should not be too difficult.

Thank you!

These guns would be perfect for the crew of my ship. Real guns would be inappropriate as they're always getting extraordinary drunk and would just end up hurting each other by mistake. I'd have to hide the actual nails though.

Do mean welding aluminium or welding in general? There's no big secret to welding aluminium :)

It's an autonomous tractor that specializes in weeding by using an onboard CNC machine.

I can weld aluminium ok - it's just that it's very expensive.

Thanks Sam - comments are appreciated! Please could you elaborate on why you think it's over built? I am trying to remove as much bulk as possible with the plasma cutter.

Thanks for your comment, Mark. Next instructable will be about building the chassis, which was finished today. Should get it published in the next week or so. After that it would be the CNC build but there might be a bit of a delay whilst I try and get some sponsorship from my suppliers.I was not expecting to get the whole machine finished until 2019, but progress has been faster than expected so there will probably be a working prototype in the Spring 2018 for 'Proof of Concept'.

Yes no problem - pleased to help.

Yes .... You are absolutely ..... I'm secretly planning to colonise Mars and build a large 5 star hotel for future travellers. There will be a 'Low Gravity' golf course as well.

I think this is what the RTK (Real Time Kinetics) does in the Ublox MCU.

Very Cool!

Thanks for the tips. I'll need to repeat my tests with the base station 100 metres away from the rover and see if there is any extra error. Obviously, if it was 10,000 metres away the environmental conditions such as cloud and humidity would be different so there would then be more error.Radar sounds like a good idea and I did look into it briefly. I don't think it's so easy to get an 'Out of the Box' solution as with GPS / GNSS. I'm sure that if WW3 breaks out then all the satellites will go offline, but until then I think I'll carry on using them!

Most of the work will be done by a rotating claw that moves around inside the Weedinator chassis as in animation. It wont spray any herbicide and will be able to recognise weeds through object recognition cameras. It will probably also have some kind of pest control system eg an on board water canon for pigeons. - not sure of the details yet.

Certainly the concept is not new but some of the build details will probably be original - I've not done any searches so don't know for sure what is original or not at this point in time.

If the Weedinator is placed in a field and there is no history in the database it will have no idea which way it is pointing without a compass and would have to travel forwards in an arbitrary direction before it got a heading. Mind you, that distance would probably only have to be about 500 mm or less so it's no big deal.

40mm

Weedinator - an autonomous agricultural electric tractor that can be used on small farms to cultivate, till, plant and weed seed beds. It will be able to travel up and down 56 inch wide beds, several times a day if necessary, performing a multitude of quite delicate tasks which a big tractor might struggle with. Some of the key advantages are:Less need for heavy cultivation such as ploughing which destroys soil structure. Preservation of soil health by keeping essential natural micro-organisms and nutrients near the top of the seed bed rather than burying them. No fumes or pollution especially in glasshouses or polytunnels. Will help small farms compete financially with big industrial producers.Will the Weedinator destroy jobs or will it encourage lots more people to set ...

Weedinator - an autonomous agricultural electric tractor that can be used on small farms to cultivate, till, plant and weed seed beds. It will be able to travel up and down 56 inch wide beds, several times a day if necessary, performing a multitude of quite delicate tasks which a big tractor might struggle with. Some of the key advantages are:Less need for heavy cultivation such as ploughing which destroys soil structure. Preservation of soil health by keeping essential natural micro-organisms and nutrients near the top of the seed bed rather than burying them. No fumes or pollution especially in glasshouses or polytunnels. Will help small farms compete financially with big industrial producers.Will the Weedinator destroy jobs or will it encourage lots more people to set up small farms and help protect the environment? (Let me know what you think).

Very nice instructable! Watch out for the UV light from the welder as it contains just the right wavelengths to give you skin cancer - Never weld in shorts or T shirt or both!

Very nice!

Thank you!

Thanks skrubol - that's a really good tip. I found some 8Nm motors here: http://www.electrocraft.com/products/bldc/RP34/Not sure what the price would be yet.

Normally a tractor will have rigid back axles and a front axle that swivels in the XY plane. I could have copied the normal tractor design, but this solution saves a lot of weight and enable all four drive units to have the same design so easier to build and maintain.

I'll research that - thanks!

yes please - that would be really useful.

Yes that's a good observation and it would need to be protected with a rubber gator.

Is that 6" x 6" ? We work in (mostly) metrick on my ship :)

Thanks - hopefully it will indeed be of benefit.