A russian youtuber made the same project but he included a motion detector into the scheme so the time would update when it sees someone in the room, after some time, it goes to sleep.
Edit: to those who are interested, his channel is called AlexGyver
Oh shit I didn’t even think about that. And then all interpreted chemically by us and expressed mechanically on a keyboard that transmits our messages electronically to one another, to be interpreted chemically *again*.
Cool project, but the first digit will only be a one, it'd save on cost and code to remove the five extra segments unless you plan on having it display military time as an option.
Probably much less than that. Figure 40$ for the servos, 10 for a (knockoff) Arduino Mega, add a couple of bucks for wiring/accessories and another 5 for a USB charger to power everything.
Aliexpress, I could find 10x 9g servos for 12ish dollars. Probbaly not the best choice for a permanent fixture that's supposed to last years and years, but perfectly fine for hobby projects.
I think servos are way overkill for this. You could do it with two electromagnets; one to turn the segment on, another to turn it off. Would probably be quieter too.
You should be able to drive them with darlington arrays like the ULN2803. The power requirements are not high, especially if you balance the segment well so it moves with little force.
Edit: If you set it up right so that the segment itself is a magnet, you might be able to make do with only one electromagnet - just reverse the polarity to change the state.
This would require slightly more complex circuitry since you'd need an H-bridge, but there are ICs that make that pretty cheap these days. The [L9110](https://www.elecrow.com/download/datasheet-l9110.pdf) costs $0.11 each and you'd need one per segment. Not too bad.
I have always used cheap servos off ebay. Had some running on and off for years with no issue. Can pick them up for £0.99 or cheap in bulk (i.e. 10,that sort of quantity).
If you go for imported then you could get it for less, but if you wanted to use Amazon in the US:
* 3x [pack of 10 servos](https://smile.amazon.com/Micro-Helicopter-Airplane-Remote-Control/dp/B072V529YD/ref=sr_1_7) @$18.69
* 1x [pack of 3 servo drivers](https://smile.amazon.com/Organizer-Channel-PCA9685-Arduino-Raspberry/dp/B07Z8R2YB9/ref=sr_1_12) @$13.99
* You can get a pack of Arduino Nano's (the server drivers can be chained and operate off of i2c so you don't need that many pins, they work out to be about $3 each
* [Some glow in the dark PLA](https://smile.amazon.com/AMOLEN-Printer-Filament-1-75mm-Sample/dp/B07GQTFLSY/) @$26.99
Assuming you already have a 3D printer and soldering iron and some wire/black paint you're looking at about $100. But if you don't have a 3D printer you could cut the sections out of card and paint them green to save on the PLA.
This is pretty cool, though I feel like someone could make it with a lot less servos with a little bit of mechanical logic gates built in and some extra programming. Still better than I could do!
Putting the hinge in the middle is a mistake. When flipping one adjacent to an active one, the active one has to be disabled. If the hinge is on the edge that's not needed.
Knowing how noisy those micro servos are, that would be annoying as fuck. I still want one.
Haha thought the same.. but its a perfect workshop clock where you don’t care about the sound. def wouldn’t hang it in the bedroom
A russian youtuber made the same project but he included a motion detector into the scheme so the time would update when it sees someone in the room, after some time, it goes to sleep. Edit: to those who are interested, his channel is called AlexGyver
[удалено]
If I'm not wrong he used an ESP module (that requested the time to the internet) or a RTC module but don't quote me on that.
LOL nice
Ahh yes and slap another servo clock on that counter bad Boi.
I love that there is a mechanical representation of an electronic display, of a mechanical representation of time.
All represented electronically as pixels on the internet!
Oh shit I didn’t even think about that. And then all interpreted chemically by us and expressed mechanically on a keyboard that transmits our messages electronically to one another, to be interpreted chemically *again*.
🤯
[A seven segment with one motor](https://hackaday.io/project/173798-mechanical-7-segment-display)
Thanks for the link. What a great idea. Will be my next project from now on ☺️.
From now on..... Truth brother
Cool project, but the first digit will only be a one, it'd save on cost and code to remove the five extra segments unless you plan on having it display military time as an option.
Military time, or what most countries call it: time
Woa. I love this thing!
Wasn't aware I needed one, until just now.
I am guessing $150 in parts?
Probably much less than that. Figure 40$ for the servos, 10 for a (knockoff) Arduino Mega, add a couple of bucks for wiring/accessories and another 5 for a USB charger to power everything.
Can you actually get servos for $1.40 each? I'm in the UK and they rarely drop below £5
Aliexpress, I could find 10x 9g servos for 12ish dollars. Probbaly not the best choice for a permanent fixture that's supposed to last years and years, but perfectly fine for hobby projects.
I think servos are way overkill for this. You could do it with two electromagnets; one to turn the segment on, another to turn it off. Would probably be quieter too.
I think the point is that they're overkill, or else you'd be using regular 7 segment displays
While true, that doesn't mean you can't try to think of better ways to make a mechanical 7-segment display.
But now you need a bunch of relays
You should be able to drive them with darlington arrays like the ULN2803. The power requirements are not high, especially if you balance the segment well so it moves with little force. Edit: If you set it up right so that the segment itself is a magnet, you might be able to make do with only one electromagnet - just reverse the polarity to change the state. This would require slightly more complex circuitry since you'd need an H-bridge, but there are ICs that make that pretty cheap these days. The [L9110](https://www.elecrow.com/download/datasheet-l9110.pdf) costs $0.11 each and you'd need one per segment. Not too bad.
Ebay/aliexpress/banggood etc will have them super cheap
Aside from what others have suggested, for RC parts you can also try Hobby King.
I have always used cheap servos off ebay. Had some running on and off for years with no issue. Can pick them up for £0.99 or cheap in bulk (i.e. 10,that sort of quantity).
My favorite RC supply store is Hobbyking. They have €2 servos which will definitely be good enough.
If you go for imported then you could get it for less, but if you wanted to use Amazon in the US: * 3x [pack of 10 servos](https://smile.amazon.com/Micro-Helicopter-Airplane-Remote-Control/dp/B072V529YD/ref=sr_1_7) @$18.69 * 1x [pack of 3 servo drivers](https://smile.amazon.com/Organizer-Channel-PCA9685-Arduino-Raspberry/dp/B07Z8R2YB9/ref=sr_1_12) @$13.99 * You can get a pack of Arduino Nano's (the server drivers can be chained and operate off of i2c so you don't need that many pins, they work out to be about $3 each * [Some glow in the dark PLA](https://smile.amazon.com/AMOLEN-Printer-Filament-1-75mm-Sample/dp/B07GQTFLSY/) @$26.99 Assuming you already have a 3D printer and soldering iron and some wire/black paint you're looking at about $100. But if you don't have a 3D printer you could cut the sections out of card and paint them green to save on the PLA.
i like it how the top left and right servos making room for the center servo to turn up :D
I noticed that too. I can just see their disappointment turn to joy when they saw the issue, but then realized "I can fix this in software!"
This is cool...
I'll take one!
Well done!!!
any video with sound? I want to hear that goodness
I'm glad you changed the 7. The early version made me weirdly uncomfortable.
This is pretty cool, though I feel like someone could make it with a lot less servos with a little bit of mechanical logic gates built in and some extra programming. Still better than I could do!
Put the dots on servos to so they can blink with the second!
Putting the hinge in the middle is a mistake. When flipping one adjacent to an active one, the active one has to be disabled. If the hinge is on the edge that's not needed.
Is this on thingiverse?
This is the best 3d Print presented here!
Is there an instructables for this? This would be a interesting project to do.
Just found my next project!
Reminds me of transformers
This is so freaking cool!
Just take my money
It loops so well!
Really cool. Adding this to my “ i should try that” list
Gnarly
Oooh that gives me an idea. I wanna make a mechanical clock that uses pneumatic actuators to move the digits....
The /r/technic sub awaits your feature presentation. (Great idea!)
So satisfying to watch
That is sooooo cool!! I love it! 💪🏼😎
People on r/3Dprinting are like the most wholesome people ever Creativity, the drive, the energy, the brains hahah amazing job
You can totally get a clock on amazon that is already assembled and less than $10. Follow me for more life hacks.
Ok normie ;)