[Lawnmower Game Crack All Type Hacks
Ainoha Sistek
I'm looking for a wire guidance transmitter and sensor system (similar to an invisible dog fence) to control the route of a robot lawnmower. A transmitter puts a RF signal on the buried wire and sensors on the robot pick up the signal and follow it. This type of equipment is used a lot in industry but industrial grade electronics is very expensive. I am looking for a low-priced transmitter and sensors. I have googled and found nothing. Please don't suggest I paint a white line all over my lawn and use photo sensors. A GPS system is only good for about plus or minus 5 meters, I want plus or minus a few centimeters. Any other suggestions? Maybe I will buy a used invisible dog fence and open up the dog collar and see if I could get a signal from it.
I'm not sure yet if I should use the wire for full guidance or only as a lawn edge detector and let the mower move randomly within the lawn. I would lay the wire on top secured with big staples and let the grass grow over it.
warren631:
I'm not sure yet if I should use the wire for full guidance or only as a lawn edge detector and let the mower move randomly within the lawn. I would lay the wire on top secured with big staples and let the grass grow over it.
If you definitely must go with a wire (as opposed to say, magnets and hall-effect sensors, or something else) - a cheap way to do it would be to use something like this to energize the wire and pick up the "tone":
Anyhow - that might just be a question of amplification? Maybe you could amplify the output in some manner of the toner transmitter (or amplify the receiver audio)? For as little as such a device cost, it would be worth experimenting with...
Update:
My solution was to buy a pet invisible fence ( -electronic-fencing-system-transmitter-collar-w227-one-to-one.html) and hack into the dog collar unit to get a 0 - 5 VDC signal for how close to the wire (edge) the mower was getting. It was easy and works well. The signal was a little jerky so I had to do exponential smoothing on it. The perimeter wire is buried or out of sight. On a timed basis the mower follows the edge wire (getting close but not over the wire), sometimes it does random patterns, sometimes it does spirals if it finds enough space. It also has a IR receiver for remote manual control using an old TV remote (I use this to move it back to the garage - it is heavy!), scanning ultrasonic ping sensor for object (people) avoidance and three bump switches. I used an old power wheel chair ($100 on Craigslist) base for the chassis, battery and charger (the owner had just bought new batteries before he died), wheels, drives, gears, and powerful motors included. All I had to do was remove the chair part, add the cutters in front (4 string cutters), add brains (Arduino Uno) and sensors. The wheel chair maker says it goes 18 miles between charges!
I've got one of these, but I haven't taken the time yet to hack it (purchased it used off of Craigslist for $50.00!); surely there is some place on the motor driver board that is monitoring (or can be made to do so) the current to the motors; look between where the motor wires connect and the output h-bridge drivers - you might have to do some probing. Basically, you are looking for a point on the board where you can monitor a voltage representing the current consumption of the motors; it will be lower when the wheels slip. Good spots to probe for are any place marked "TPn" - where "n" is a number (stands for "test point" and is used for troubleshooting the boards, usually). Testing will be another thing (you'll want to build a pony brake with adjustable slip, and test the motor without the gearbox).
Still improving on it. The speed and navigation need improvement. It goes too slow up hills and too fast down hills (sometimes it overshoots the invisible dog fence wire boundary) so I need to add some kind of speed regulation - maybe I need 'IR Compensation' on the DC motors, or feedback to a PID control from tachs or encoders on the wheels? I will try something simple first such as a tilt switch to switch between low and high speed to give more power when its going up a hill. Any other suggestions?
What I have learnt for others: Orientation of the four DC cutter motors was critical to minimize RF noise interference to the dog collar sensor. I had a big problem trying to eliminate motor brush noise (using shielded cables, proper grounding, capacitors, etc.) then I noticed that if I just rotated the motors to a certain point, found from experimentation, I could almost eliminate the noise problem.
The power wheel chair's joystick was very complicated using four hall-effect IC sensors on the joystick and a 'fly-by-wire' custom network cable down to the drive motor controllers. So I used two servos (in the white inverted ice cream box on top) to actually move the joystick for speed (X servo (including forward and reverse)) and direction (Y servo). This seems to be a simple solution.
Nice video, I'd like to suggest a magnetic azimuth sensor to make straighter lines, but maybe it curving because it detects the doggie wire. Very impressive. What kind of cutter device are you using?
Thanks,
Paul
I put a snow plow on the front to plow the snow - see it on YouTube: RoBoMo transforms into RoBoSnow for the winter! - YouTube
I added a magnetometer (about $5 on Ebay) (floating in an oil bath to keep it level for accurate readings).
These quick and easy lawn hacks will not only save you time and money but also contribute to the overall health and beauty of your outdoor space. So, try these lawn hacks today and watch your lawn thrive with minimal fuss!
A: The frequency of lawn mowing depends on the grass type and its growth rate. In general, mow cool-season grasses once a week during their peak growing season and warm-season grasses every 7 to 10 days.
A: Regular lawn maintenance practices such as proper mowing, watering, and fertilization can help prevent lawn diseases and pests. Additionally, avoid overwatering, as it can create conditions conducive to fungal growth.
Though we tend to appreciate a healthy, lush lawn most in the summertime, taking care of grass is a year-round task. To get your grass ready for a full and healthy growing season in the spring, you'll want to start thinking about how you can prep your lawn for peak performance. Reseeding grass is an excellent lawn care technique to counteract any bare, dead spots that may have revealed themselves after a sweltering summer or high foot traffic. Reseeding is also an excellent lawn care hack to get your grass extra thick, regardless of your grass type.
Before you begin planting grass, you'll want to make sure your lawn is well-prepped. Don't worry! We will walk you through all of the steps for reseeding your grass correctly in the spring and share additional lawn care tips and tricks.
You might ask yourself, when is the best time to reseed? Planting new grass seeds in the fall or winter will allow the seeds to germinate and begin sprouting in the spring. This is referred to as dormant seeding. Your lawn might have taken a beating from heat and lack of hydration over the summer. With these tips for prepping your lawn and planting new grass, you will see new growth in a few short months.
Keeping your lawn cut short will help you see any bare spots that may need some extra TLC. A short lawn can also help identify any soil issues, like soil compaction, that you can resolve before planting grass.
Before reseeding grass, it's essential to remove any dead grass, weeds, or other debris from your lawn. Planting grass seed should be done on a clean and cleared lawn to prohibit any obstructions from preventing the seed germination process. Check out this guide to grass seed germination to learn more about preparing your lawn for planting grass.
Once your ground is cleared and the soil is loose, you'll want to conduct a soil test to check for any nutrient imbalances. If your lawn is lacking in nutrients, it's time for fertilizer. Our favorite way to fertilize is to go liquid with lawn care. To combat against nutrient-imbalances in your lawn, try out these fertilizer blends that can help restore the state of your soil:
These fertilizers are well-suited for a fall application to see results in spring. Ensuring your soil has the proper balance of macronutrients and micronutrients will provide an excellent growing environment for the newly planted seeds.
After you clear your lawn in preparation for reseeding grass, you can start to pick out the type of grass seed you'll be planting. Though reseeding grass can help to provide a thicker lawn texture, the main reason homeowners are planting grass seeds in their lawns is to combat any dead, bare spots. To start reseeding, look for these bare spots and spread seeds in the area.
Once the seed has spread, you'll want to cover the seed with soil, compost, or mulch. After you've placed the covering on top of the seed, immediately water the area. If you are planting grass that is all-new, you'll want to pick a grass type that is suitable for your region. Learn more about the differences between cool-season and warm-season grasses to ensure your season and region can support your newly planted grass.
After planting grass seeds, adequate hydration is a requirement to activate seed germination. Once you have finished planting grass, maintain a consistent, rigid watering routine for the following two to three weeks. Make sure the soil stays moist without being oversaturated. When new lawn blades begin to sprout, you can resume normal levels of lawn watering.
Mastering the first mow is also part of the reseeding grass after-care plan. If reseeding in the fall for spring growth, your first mow may not be until mid-spring. When the time is right, adjust your lawnmower's height so that no more than one-third of the lawn blades are removed during trimming. With the right cut, proper nutrition, and adequate hydration, your new grass seeds will grow strong roots and tall blades, filling out your lawn impeccably.
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