Microbits, servos, PIRs ...HELP!!!

[John Weir]

Morning all,

I am just starting into the world of Microbits and am looking for some help in solving a problem I am having. I know there are quite a few on here with lots of experience in the field.

I am trying to connect microbit to 2 servos  and a PIR (and maybe am LED as well). The idea is to work as an intruder alarm project with motion triggering action in both servos. I am having issues that I think stem from power but it may be that I have just set it up wrong.

What would the best way to physically connect and power this. 

I see kidtronik do a 3 servo control board

https://www.sgeducation.ie/product/kitronik-simple-servo-control-board-for-bbc-microbit

Would this best solve all my problems? 

Any advice welcome

John

I suspect this may solve my problems but I am wondering if I am missing something else

[aaron hynes]

Hi John,

I have found that most of these sensors are 4.5v not the 3v supplied to by the Microbit.

Connect the positive from the 4.5v battery to the Pir sensor and the negative to the 0v of the microbit. Should work then.

Aaron


Sent from Yahoo Mail for iPhone

--
--
You received this message because you are subscribed to the Google
Groups "CESI-list" group.
To post to this group, send email to cesi...@googlegroups.com
To unsubscribe from this group, send email to cesi-list+...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/cesi-list?hl=en-GB where all messages are archived and are publically available to non members of the list. Messages may also show up in search engines etc.
Visit the web site www.cesi.ie
Attempts to use the list for commercial purposes may result removal from the list.
---
You received this message because you are subscribed to the Google Groups "CESI-list" group.
To unsubscribe from this group and stop receiving emails from it, send an email to cesi-list+...@googlegroups.com.
To view this discussion on the web, visit https://groups.google.com/d/msgid/cesi-list/62285f35-10c1-4437-a0d0-288321399eecn%40googlegroups.com.

[Chris Reina]

Hi John,

Welcome to the world of SBCs!

I suspect you could be correct in terms of power. Microbits (with a battery pack) use 3V and this is not usually enough to power a servo. (unless you have a smaller size one)

The Microbit will handle power up to 5V/6V (a rechargeable battery pack is your friend here - almost all of them are 5V)

If you plan on doing a number of projects using servos - it would probably be best to get a dedicated control board - this will allow multiple devices and are powered (usually the board and Microbit together).

Feel free to give me a shout if you like. I have a workshop (using Microbits ironically!) this morning, but will be finished by 13.00.

My number is: 087-2685020

Cheers!

Chris

--

[Conor Power]

The move mini board is an option. It has 5 neopixels built in (could do different colors for intrusions). It can do 4 three wire servos (pins out for two. Powered of three AAA with on/off switch integrated. There is a built in extension on makecode for them.

--