Thank you for this I needed this so much as other channels wanted to use a library but i needed to alter the code to allow and io expander and use a proper debounce. Now I can code it without code. Well explained Sir…🎉
Nice! I'm originally from almost where you are located (always good to see familiar names on the map). As for the altitude: this should be corrected for QNH (so, like you're saying, the weather basically). I've seen tables for that in other sensor manuals; still gotta check this one.
Are you agent Smith... sounds to me like: "Mister Anderson... you disappoint me..." 😀 Now back to the topic: where you able to *write* a card / fob with this device?
Quick question: on which side should we solder? On the side with the writing or the side with the components? I did the soldering on th side with the writing and I feel like this is why it didn't work. Looks like the copper wiring is on the other side and if the soldering was superficial it didn't make a proper connection.
ON my project, i have also an lcd i2c display. When i power supply the project from a external source, not from usb cable for arduino, the lcd display doesn't show any data. Just powers on the screen. Do you have any idea what could be the issue?
for how long should we iterate through the output pins and provide voltage in order to detect which column key is pressed? should this procedure of reading the column go on forever until the key is pressed?
Good question. Think about how long you need to press a button. In this time you have to go trough all rows AND columns, so you won't miss the press. And of course you have to go on checking for a key pressed, because you never know, when this key press will happen.
My BMP280 came without the onboard level shifters. Meaning it runs on 3V3. I have a couple of options... 1) Provide two rails - 5 volts and 3.3 volts - and Include separate level shifters. 2) Is more interesting... Run the Arduino and the display on 3V3, too. Here's how to do it. The Arduino has an auxiliary 5V output pin. This output is after the Arduino's voltage regulator. Simply input (yes, input) 3V3 on this pin and the Arduino will run, happily. Next, use a 3V3 1602 Display. Or, convert a 5V unit. They (mostly) all use a common board which can be configured as either voltage. The 3V3 model uses a L7660 negative (yes, negative) charge pump to lower the 3V3 ground point to a net 5 volts = clever. All the needed vacant pads are already on most 5V PCBs. Just add the L7660 and a couple of caps. HTH.
I know it is an old video, but I still hope you can see my message and help me with my question, I am working on a project of a chess board, the plan was to attach a rfid tag to each piece and read it from the board. the complex part is that we need 64 readers (or antennas) to read the tags from each square (so we can tell what piece in this square). is there any way to accomplish this task? by the way each square is 4x4cm. and I am looking for most effective and cost efficient way. thank you in advance
You could make it with only one reader and two stepper motors. Like a plotter, you just move the reader from one field to the next. It would take a lot of time each time you check the board. But you could calculate, which figure is able to move, and check only the places where it can be moved to. Just an ideal.
Muchas gracias por realizar este video, muy claro e instructivo. Por fin pude programar mi BMP 280, pensé que estaba roto. Saludos desde la ciudad de Córdoba, Argentina.
The altitude is calculated by the air pressure. And since the air pressure varies, the accuracy is rather low. You could increse it, by taking the current temperature and the air pressure at sea level at your location in consideration. If you want a higher accuracy, than a satelite based sensor, like GPS, would be a better choice.
@@nenioc187 Ah Okay, I see. I'll need to look into GPS sensors and maybe even combining that sensor with the BMP as a backup. My altimiter will need to be correct, 100% of the time
You only get a digital sensor value out of this sensor. Which only refelcts if an object is detected or not. You could maby solve this, by using several of this sensor with different resistor values. But I'm not sure, if the interfere with each other. Could be a nice project.
Hi pal, nice sharing. Wondering if any custom PCBs are required for any upcoming project? Would love to sponsor and reach any collabs with you! (PCBWay zoey)
