I'm fairly new to the electronic hobby. I bought my UNO R3 kit and a 37 piece sensor kit as a Christmas present to myself, so I'm only around 5-6 months into this journey but you have taught me so much. I just wanted to drop you a comment and say thank you for making quality and informative videos. :)

I’m a retired mechanical engineer from Sydney, Australia. Just recently started dabbling into electronics and found your guidance extremely helpful. Thanks for your very helpful projects.

I have been doing electronics from 1966 as a ham operator and from 1969 as electronic maintenance engineer. Now I am retired and have been ignoring Arduino until now when I need a matrix keyboard electronics. Thank you for very clear tutorial.

You are amazing - your videos are SO good!! Each and every one of them is pleasant to watch/listen to, clear, detailed, and very step-by-step with no missed steps in between! Thank you!!

As always, *GREAT* *JOB Bill* !! For those that don't know, you might have explained the 2 jumpers on the I2C module and the one on the Relay.

Thank you! I was having issues with entering multiple digits in a row but you answered all my questions there!

For us noobies.... this is a very informational video. Thanks for the time taken to produce this video. Learned a lot already. Just wanted to share something that was a mystery to me until I found it on Amazon. And that is the LCD address. Default Address: 0x27 for PCF8574T chip; 0x3F for PCF8574AT chip;. Mine has the PCF8574T chip, hence 0x27. No wonder it didn't work when I had 0x3f. Thanks again for all who share their experience with us 'noobies'.

this is the best one out there. He explains how library ref works and why he chose to wrote the code in such a way. The others just make a 3-5 min video and then spent half of it showing now to solder.

I watch whole ads without skipping only for his effort! Its easily understandable even by beginners.

Great weekend lockdown project. Simple and practical. I designed a 3D case that when finished it will house the display and keyboard that will access my backup locking system on my work shed. It’s a very easy to follow instructions for beginners or intermediate makers that will showcase how a few bits and pieces can produce a working device. I highly recommend this project.

Thanks a bunch. Best information on how the joints work on a matrix keypad. In fact I've been inspired to take some small buttons and create my own 4x3 keypad on a PCB working as a radio transmitter controlling several other Arduinos using an nRF2701 module.

Love your channel, your work shop, each lessons and the fact that you teach everyone who knows little to absolutely nothing about electronics & electricity. Your explanations and real world applications make your lessons even more useful and enjoyable to your audience. I too use the female to male Ribbon Cables to make connections in the same fashion as you do, but I’ve found that cheap ones have minimal contact on their respective sides and have caused more problems and made bad connection when using them. I only purchase quality ribbon cables from now on because of these problems created. You mentioned that we could use any pin for signaling the Solenoid controller and you chose pin 13. I’m guessing any pin that is still non-designated unless we rewrote the software code to allow for double usage! I’m fairly new to code writing as you can read from my question. Have a long history with electronics & electricity but interfacing the coding is still a challenge for me. But with your tutorial I’m moving at a faster pace now and for this I thank you for all that you make available to us. Great job and I’m constantly going back over and rewatching all your tutorials. If only my workbench and area look like yours? To have power coming from a outlet on the back face of your workbench. Now that would be something, and maybe you could show us how you developed your workstation? It truly is something to be proud of!!! Love you work and never miss any or your video’s because there is always something new to learn even though I’ve been at this for awhile!!!

Kudos to this channel for finally ditching the two camera setup during the show. Now the show can get it's 5 star rating it deserves.

Thanks so much for the excellent videos you produce! Just enough information, but not too much. Awesome job!

Thanks, I look forward to your videos. Every time I learn something new.

It was a useful and educational video. I watched every second with pleasure.

Yet another great video. Thank you for sharing your expertise to newbies like me.

I am a 12 year child and I was very interested in electronics I got my first arduino it was very important for me to understand as I had no idea this channel is so helpful that I understand it so easily thanks

Years ago, I had a car with a broken ignition key lock, so it could be started with any key. Rather that replace the ignition key lock I installed a hidden matrix keypad that acted as a starter bypass system so the car couldn't be started unless you entered the code on the hidden keypad first. Yes, it would've been easier to just replace the ignition key, but it was way cooler to have a hidden keypad to start the car lol

Adsense owes you for 2 commercials I watched before the video started. Thanks for making this video. I can now use my large number of these 16 button pads I recieved with my many Gizmosphere Gizmo 2's. What I'd love is a video showing how to use the pad, 4 or so air quality sensors and a (I think it's a DHT11) Temp & Humidity sensors to be able to have the display switch between the sensors based on the button I press on these keypads. Thanks again for this video!

As always, you have explained well. Thank you.

Thank you so very much for the amazing video with a simple explanation.

I have seen many of your videos and enjoy them very much. Being new to this hobby I remember watching a video of yours explaining how resistance can determine what key was pressed. It seems you could do the same with this keypad . this post was inspired by one of your previous videos and I very much like them all thank you.

I'm going to use this setup with the rotating Lidar that you introduced in a past video!

Stay safe too man, you're doing a fantastic job!

I will find this useful thank you. The obvious difference would be to print out a row of asterixs instead of the key press but I will think about that.

Very nice video. I will keep this in the back of my head as something I may use in the future.

Thank you very much for your project. Completely clear.

Im so appreciative of you making these vids. Im leaning

Wonderful presentation thanks

Thanks for the tutorial which I found very helpful. Having been puzzled by seeing the "!strcmp()" command, I looked it up and realised that it is "!strcmp" that returns a TRUE if the strings are the same not "strcmp", which surprised me but then the code made sense.

A very nice and thorough video as usual!

How people gives thumbs down? As long as people give effort you should appreciate it, especially for this kind of project. Look how he present and Explained it well ⚡ Be kind, spread love

Thank you. Amazing tutorial

Thanks for generous delivery of info. EAZY.

Excellent tutorial, thanks!

Your explanation are really perfect !!

I learn much easily through your videos

Your videos are always understandable and informative. Thank You! This would also make a good dummy security device by not connecting it to a locking device and simply replying "Incorrect Password" after any entry. Of course, that means using the old keyed lock-set as usual, but you might keep some burglars busy for a while trying to enter a non-existent password.

Sir please keep going with the good work. I really love your videos

Great presentation, as always

Thank you Bill great video

you have great way to explain. thank you

Congratulations for this vídeo, very good lesson. Thanks!

Nice projects Thanks for sharing 👍😁

Very very useful tutorial and project. thanks for sharing.

Your website is most excellent. Thanks for this tutorial. I learned a bunch.

You are really good explainer. Your valueable video to teach us to learn Arduino code and make a project. Thank for sharing

Very good explanation and demonstration

Thanks for this useful post.!!!

well explained, good content

I love your tutorials! Thanks alot

good and clear information,thank you

Best tutorials on youtube

Could you please do something for the upcycleing and reusing of salvaged keypads/lcd displays/rotary encoders, ANYTHING that you can salvage from electronics, please??

Thank you for this crystal clear video. I guess the keypad library includes a debounce routine so multiple keypresses are not detected ?

Thank you for the demo!👍👍👍👍👍👏👏👏👏👏👏🙏🙏🙏🙏

It was extremely useful to me...Thank You sir..

Thanks for the awesome video, Bill.!! Are you planning any more DB1 videos in the near future? Stay safe.!!

thank you this is is very informative

thanks, best video about keypad :)

Thank you for another great video tutorial. And that CircuitBasics website is a great resource for both Arduino and RasberryPi.

Sir you and your videos are just marvellous

excellent video

Thank you.

thank for your sharing

Very interesting thank you for this video

WOW, THANKS!

this video is just GREAT !!!!! thanks a lot.....

Great informative video. Just for fun! What happens if the Arduino looses power. Will I be locked out?

This is a great presentation! Have you demonstrated using a RF ID module?

Your videos are always awesome! Love this one too..!

Very clear

You're the best.

Thank you for the instructional video. You saved me from purchasing a computer manufacturer's $25 keypad which is more or less the same thing as a $3.99 one.

Perfect 👍

Cool video, thanks.

Mudah dipahami videonya,dan terimakasih atas programnya

ABCD are part of the AUTOVON military telephone network. It's still there but no longer used very much. ABC and D were usually marked as "Routine, Priority, Flash, and Flash Override", each creating a "precedence" for the call going through. Flash Override was the highest priority call and each of these classifications could "preempt" other lower priority calls on the public network during a disaster or other emergency. For the youngsters: Flash wasn't always used for just three-way calls. It was originally used to signal or "recall" the operator after a call to arrange payment for overtime usage or to set up repeat dialing or "sequence calls" which are calls that could be made after the current one without hanging up. After that, Flash (or "Link" on Nortel phones) was used to invoke other automated features, such as conference calling, call waiting and call parking.

Thanks for an good and interesting video. =) Now a dumb question. What are the programming language in use?

Thank you very much

Thank You

Thank you for your very informative and patient explanations. I am a bit puzzled by the lamp connection and the relay. I have a relay module that comes with Egeloo Super Starter kit and it seems to have the same model number, but I see in your video, it's mounted on a different controller...what's that controller (Q1)? (so I can locate it in my kit or purchase it). And secondly, what is the lamp model (Q2)? and how is that connecting to the unknown controller that relay is sitting on (Q3)? There seems to be 2 wires from that controller...one of them to the lamp which is going to 12V DC (we don't have 12v on UNO R3). Your setup is cool but we don't have such setup for educational purposes...could you explain how we can achieve this economically? (I already have connection to keypad and other modules such as buzzers and displays working). Many thanks in advance. Hope you're still around on UKposts!

The only suggestion I would make after completing the testing of this code would be to display an asterisk rather than the number typed in for the password. No need to display it. That kind of defeats it. I would also step it up one more step. Add a RFID card reader in addition to the passcode. "Something you have, and something you know." Hreat video!

Thanks a lot, nice video. Could you create new training for stepper motor. When you enter a value and stepper motor turns as much as the value is entered

Great, thanks .

You can also put an extra count in the 'incorrect password' section. If the count reaches, let's say 5, then the program goes into an infinite loop. Offcourse you need to reset that count in the 'correct password' side

good job

Can the pins being used by the TFT screen be utilized if using a breakout board? Dual usage on the pins as it were.

WHy is this guy so gud in explaining but still don't have muh views??? But he is doing a great job

sweet vid... i would like to use may be this matrix membrane keypad or just a 4 button version to tell the Arduino to output usb windows PC F11 F12 function key commands to control pause/run Bandicam software and change the regedit registry file to run/pause (0 or 1) of a second program syncing the 2 together? now to make it happen? suggestion... thanks a lot...:)

Thank you brather yoù best ticher

Great video can u make project with arduino uno fake bomb for airsoft/paintball

Your arduino videos are excellent and easy to follow. I have a problem though. I am following a project to build a arduino controlled rotary indexer. I am using the 16 key pad that you are using in the video. My problem is that my stepper motor controller uses pins D2 and D3 So I won't be able to connect my keyboard to D2 and D3. is there a way around this please.

Thanks for sharing this, Bill. A while back, you talked about using the XOD IDE for the Arduino. I have been learning more and more about XOD. I searched the XOD library, but could not find one for the KEYPAD, although they do have some libraries for the LCD+Buttons, but nothing for a basic matrix keypad. Do you know if there is a way to use this keypad with XOD? Do I have to make my own node with 12 or 16 buttons? Thank you.

Hi, Thank you for your videos. I found that I had to switch lcd.backlight(); and lcd.init(); to get my display to work. So lcd.init(); had to go first before lcd.backlight(); in this order.

Thanx alot...

awesome job, but would you please provide code for the door lock application using the normal 16*2 LCD that is not of type I2C?

Nice tutorial, thank you. I don't know, I2C keyboards could be better, couldn't be, right?

thanks very much its very useful