neato speaker hack (stereo + bluetooth)

neato robot cleaner

needed to open and fix the side brush

 o-ring dried and failed

and while waiting for the o-ring to arrive

saw an actual speaker instead of just a buzzer

and thought of a nice new upgrade to its boring sound

used some stuff that i already had 

bluetooth module cost about $1

amplifier module cost about $0.25

also added another speaker that i had

speaker resistance should be the same for both sides left / right

lower resistance is better in general

in the case of neato d85 it was 8 ohms 1.5w  2.5cm

quick inspection look like ajt 436 so maybe max 436?

package size is 1x1mm

 

a matching speaker should cost about $0.40 

and small diy job of wire extensions and speaker mounting 

vhm-314

pam8403

current consumption while idling is about 190mw

while playing at full volume consumes around 850mw

although i dont mind if the robot battery wont hold the charge

to complete the full cleaning cycle it might be worth 

to add a small separated battery for the music section

 

and a short video

sounds much better and most importantly

stronger then the boring vacuuming sound

sound and motor test

still get some annoying distortion

need to get a stronger neodymium speakers

the location of the added speaker seems reasonable

and should be facing the middle of the room

as the opposite side housing the side brush

which should face the wall and corners

more photos and videos to be continued