Why not connect a single resistor to the common anode or cathode instead of 8 individual resistors?

Is there a corresponding print article with drawings, as mentioned in the video?

This was very helpful...wish I would have watched it before I put a bunch of dips in my panel with the orbit sander! Thank you for putting this together!

Okay, so I was having trouble getting anything running on the Pico. And it turns out all I had to do was name the file main.py specifically. That was the problem. Thank you for explaining every detail instead of just rushing through everything. It's incredible that the problem I was having had such a simple solution.

Your light source is pointing down next to your camera, wouldn’t it work better the if the light source was away from the camera lighting the qr code so it would have less glare. Think of it as like a triangle

Wouldn't it be great if you could print your QR codes in "invisible" ink that could only be seen by the sensor under an IR or UV light?

Hi Chris Why don’t you use integer values for x and y (multiply by a power of ten as necessary) ? Then you could use list comprehension to get your variable values. Glad to see the project is moving forward, great work as usual.

This video really helps with my project. Thank you so much!

Thanks for the tutorial video, very nice to watch when you didn't jump from one thing to another in a hurry. Please speak calm and clear English.

I was looking for how to use interrupts on RP PIco when I stumbled upon this video. Wow, What a great tool! I frequently have 5 or 6 projects going and since I rely heavily on the mail system for parts I find that I've often forgotten what I was think when the parts I ordered actually arrive. I think your methods described here will really allow me to pick up again exactly where I left after long delays in between working on that particular project. I really like how the tabs allow you to keep specialized notes for whatever experiment you might have been performing, and the space to allow you to add in any extras that might be required. Funny, but for as obvious as it appears that note keeping is a no-brainer, I'm kicking myself for all the years I've not thought of something like this myself, especially since I'm not a Spring Chicken and have been around the block since '62! I'm definitely will be giving this a try! Live and learn! Thanks!

If you find the time Chris, try adding a de-esser to your audio recording chain, to control sibilance on the 'S' sounds (my cheap tablet may be making it worse , but i have not noticed it as bad on other channels)

This the best video that I have seen on sharpening chiesels. The theory and practice well explained.Thank you sir.

Hey Chris another question for ya…if I want to run a lot of servos I’ll want to use an external battery…so how would I connect that without frying anything? Just pos/neg battery leads to the bread board and then pwm leads to the pico do I need to connect the ground from the pico to the breadboard?

Such a great video, helpped me so much thank you !

Merci beaucoup, vos expliquations sont les meilleures que j’aie vues jusqu’à présent 👍🙏

Bush up on your OOP skills Chris. Wrap up bits that work as objects , export them to files and import as required. OOP was invented to help code organisation.

Thanks for the shout out. Hope it goes well from here.

Hi Chris. First time being first comment. I feel for you at this point. I've been there too. Code gets out of hand at times regardless of how organized one is. It's in a way annoying and a little discouraging but, at the same time, the thought of a re-write is very appealing. Not a scratch re-write but a re-organization, a re-grouping of code parts as you said. However, time is not our friend when we also have other things going on in life. I find block diagramming the organization of the functions helps but I'm sure you have always done that. Another positive is that during the re-write/organization you may find some questionable code or concepts that you could/should change and as you said, get rid of the unused experimental bit & pieces. Kinda like defragging a hard drive but in this case the code. I wish you well and some great ideas to present themselves. Take Care. 🇨🇦

Do we have to use a separate power supply for the relay board? I was going to use a 2 Amp 5V USBC power supply to supply both. I would split the supply before going to the controller

Excellent coaching... Really useful one..🙌

to solve a problem of lack of gpio on a SC0914 you use a chip that costs more than a second SC0914 and has fewer gpio than a SC0914. Why not just use a second SC0914 and have it be your gpio expander?

Great explanation... Thank you.

It's the red pill...

Thanks for your simple and instructive explanations!!!

Thanks for sharing this video and information. Good to know something to think about.

hi Chris, thanks a lot for a very clear explanation

Thanks for your tutoriuals they are helping me with a project. I am new to the PI. I am trying to use an SPI lcd (128x160px) that has an on board sd card slot, to display an image at boot. I don't want to trouble you too much, but do you have a tutorail on such a thing? Or, is there something I can do in addition to this tutorial to achieve this?

Hi Chris, I hear ya. Been there MANY times over the years. I agree, as time goes on, you come back to older code for one reason or another like to add a new feature etc. I go through some of the old code and say to myself, 'why did I do it like that'? So one thing leads to another and you make a change. THEN you run into what I call a cascading failure which means the changes you made altered something down the line which was based on the old way you did it. That's when the love/hate of programming rears it's head. My long winded point is your mind is always working in the background and if you have been away from a particular project for some time you just cannot usually remember EVERY little nuance from perhaps a year ago. So that's what happened here to some degree as well. Yes the debugging can be nasty (17,000 Lines of code) in some cases or even more. But, hopefully, once you find the error(s) and fix or re-think them, you end up with a better program. If you don't, go get a beer, come back to it another time and you may see it right away next time. Thanks for the memories my friend. 🇨🇦

Quick tip, you can use a multimeter to identify the pins. Just check for conteniuty between teach two pins and press the buttons until something beeps.

I'm the first I must be your biggest fan.😅

pf..that scrapp aluminium cost more than a drill press......

More useful info, thanks. I have a plan to build 2 full weather station that would be powered by solar cells that I can have running permanently at home in the UK and at our apartment in Spain. I still need to make wind speed, wind direction and rain sensors to add to the temperature and humidity from the DHT11.

On an other channel they used a diode between the battery power and the pico as security for this.

Well presented. Thanks for that. Subscribed.

Great video! It explains the problems I was having with my Pico project. Thanks for the detailed explanation.

you make me blush :) I just had another idea while listening to this episode: the zcheduler will be the one running the dijkstra, right? so it will be in charge to calculate pathes for each and every zoomie requesting a path. now imagine the following: after calculating one "shortest" (best) path for a zoomie it increases the weight for all edges used in this path a little bit --> it gets more likely that the next zoomie would not use the same roads. The more zoomies use the same road, the more likely the next path will pick another road. --> avoiding traffic jams by spreading the traffic. of course you have to decrease the weight by same little amount when a zoomie has reached it's destination ... hope you enjoyed your pizza tonight! tomorrow we have friends over at our house and we'll be making a whole [put right word for those steel plates of the oven here, how do you call them?] of pizza with lots of toppings ... my mouth is watering just by thinking of it ^^

Your SPF would probably best be weighted by travel -time over the segment, that way your bypass will be quicker because of fewer junctions .

SPF (Shortest Path First) is used in network routing, which takes in the "cost" of all potential route to find the most efficient path directing traffic. Not only does it avoid congestion along any one path, if there's a break on the network, the algorithm can make quick rerouting accordingly. I imagine you could one day make the algorithm respond should a Zoomie fall over and cause a road block.

I wish i could get the pico scroll working with C code. having a hell of a time compiling it without errors.

Hi Chris. I adapted your program to drive a dual 7 segment LED display and then included code from another demo that writes both numerals and possible alphas. It worked well after debugging "fat fingers". I then added a second MCP chip to drive a second dual 7 segment display. I had issues with the second MCP causing various errors which were not consistent. Even when I disconnected the first chip. After a lot of research I came across an article on a Python user group that recommended using pull up resistors on the I2C lines. I used 10K pull ups and the issues were solved. Its all working now once I remembered to use "global" in my MCP select function. Any further videos on the MCP chip? Thanks for an interesting channel.

I have another method I use. I bought a cheap USB dongle, with 4 USB ports, each with their own power switch. You can plug in the pico to any port and leave the switch turned off.

Instead of using pneumatics you can use a solenoid and a spring , it simple less parts and cheaper

Try electrical tape to build up the cable diameter then use the heatsrink

hello again Chris. I am into pico programming as well but I also have a 50+ yr history in electronics so I know what you are talking about. A few years ago when I started with the pico designs and breadboarding I also did not separate the Power supply for the breadboard and the laptop USB power. Luckily, I did not run into a problem but it was constantly on my mind and bugging me. So, on the Pico website (in the pico documentation) they address this with the jFET solution. So I designed a small circuit board to handle this, had it made in China by JLCPCB and it works (and looks) great (for those with a passion for PCB 'art') There's my questionable sanity again. I am somewhat embarrassed to say, your solution did not even occur to me at all. It makes perfect sense and is actually quite an elegant approach. I thank you for sharing that idea and I will certainly take advantage of this method moving forward. I generally design test equipment and vintage amplifier restore/modifications in which I at times use a Pico. In such instances I will simply not connect the USB power line in the project case to the Jack on the back of the enclosure being used but for development/breadboarding purposes I will do a cable cut as you have shown. It will be considerable less work than putting hundreds of new Dupont ends on my jumper cables I mentioned on a previous video of yours. Thanks again. Regards to all. 🇨🇦

nice video - will try this at a later date

great build !!! great video with lot of information . At 7:24 this tip help me , finally , a lot.. 😊Now my holes are dead center! I started to build a same drill press with SBR12 rails and i had an issue of alignment the rails .as you said in the video at 28:40 i follow the same procedure and "voila" 😊.Thank you for sharing your knowledge !!!🎆🎆🎆

Anyone who puts their name in their channel, and SAYS IT IN THE BEGIN OF VIDEO, FUCKIN CUNT.... DO NOT MAKE ANOTHER VIDEO

New music ^^

Great class. Thanks

Many years ago while I was learning to program an Intel 8085 in assembly code, One day, I finally learned how to create an Interrupt with a timer. It was an Erika moment. It seemed so many jobs back then needed precise timing. and I was having no fun creating timing loops. Once I could create a 10 mSec timer interrupt, I could time anything very nicely. That day, I told myself that I could now control anything. And, it turned out true. Learn these timer, interrupt operations and you will put these pico controllers into a whole new world of control. Thanks Chris for sharing!