How many components can the Uno power?

Hi,

Did a quick search but couldn't find the answer I was looking for.

Can the Uno power 3 servos, a piezo sensor, some LEDs, a hall effect sensor and a light sensor at the same time?

Also if it is possible, could I add a wave shield on top of the uno as well, or does the wave shield not have enough pins to connect everything together?

If I can't use a wave shield is there any other way to get sound?

Thanks for the input.

Can the Uno power 3 servos,

No. The Uno shouldn't be used to power any servos. Use an external power source for servos (grounds connected).

One_:
Also if it is possible, could I add a wave shield on top of the uno as well, or does the wave shield not have enough pins to connect everything together?

If I can’t use a wave shield is there any other way to get sound?

Digital pins 2, 3, 4, 5 & 10, 11, 12, 13 are used by wave Shield in the default setup, which doesn’t leave so much. There are other ways to generate sounds, but if you want to play audio clips that’s a straightforward way. Depending on your project you might find a 2nd Arduino to run the steppers would be an option. There’s still plenty of pins available to signal a 2nd microcontroller.

Cheers ! Geoff

dxw00d:

Can the Uno power 3 servos,

No. The Uno shouldn’t be used to power any servos. Use an external power source for servos (grounds connected).

Yeah I understand that now, cheers.

If I do it like this diagram am I right in thinking it will work?

Digital pins 2, 3, 4, 5 & 10, 11, 12, 13 are used by wave Shield in the default setup, which doesn’t leave so much. There are other ways to generate sounds, but if you want to play audio clips that’s a straightforward way. Depending on your project you might find a 2nd Arduino to run the steppers would be an option. There’s still plenty of pins available to signal a 2nd microcontroller.

Cheers Goeff - It’s been a while since a used my Arduino and wave shield. As the wave shield has pins 6, 7, 8, 9 and the 6 analog in pins, 14-20 unused. If that diagram is correct 2 pins will be used for the servos, which will mean I’ll be able to use the rest of the unused pins for my sensors. Is this correct or am I missing something?

Cheers if these questions are super amateur.

5670788674_4304c12275.jpeg

One_: If that diagram is correct 2 pins will be used for the servos, which will mean I'll be able to use the rest of the unused pins for my sensors. Is this correct or am I missing something?

Looks okay so far. You mentioned a 3rd servo and you'll need an analog input for each of your Hall effect, piezo and light dependent resistor inputs. The answer to your original question now relies on the number of LEDs you want.

Geoff

If I do it like this diagram am I right in thinking it will work?

Until the wimpy-assed 9V battery goes dead. Which won't take long. Price per amp hour, they are at the bottom of the list. AA batteries are a far better choice.

Looks okay so far. You mentioned a 3rd servo and you'll need an analog input for each of your Hall effect, piezo and light dependent resistor inputs. The answer to your original question now relies on the number of LEDs you want.

Cheers Geoff, did some research and thinking, I'm going to try and use the least hardware as possible. So I'm thinking 2 servos will be enough, with the Hall effect, piezo and light dependent resistor inputs and 2 LEDs. But I'm thinking I may only use 1 LED as I'll just put a LED into the LED2 pin and hook a wire up from that to a unused pin.

So I'll need 6 analog input pins for all the servos, sensors and LED and with the wave shield having 6 free, I think I'm there!

PaulS:

If I do it like this diagram am I right in thinking it will work?

Until the wimpy-assed 9V battery goes dead. Which won't take long. Price per amp hour, they are at the bottom of the list. AA batteries are a far better choice.

Cheers Paul, What would you suggest instead of the 9V battery? I want to run it for at least 2/3 hours.

What would you suggest instead of the 9V battery?

AA batteries are a far better choice.