Typically the day after the FAAM event where K9 got a bit of a battering the RF wireless switch arrived in the post which ment that I could get on with completing the water pistol system and add the new compressed air fire extinguisher. The gas will exit through a tube in K9's nose, he will look abit like a mad bull when it is activated but it will have a great effect. The water pistol or water canon is fitted in the red sucker in the center of his eye. I have kept this fairly powerful as it will act as a deterent to small children who want to get to friendly, really needed this at FAAM.
The Compressed air system is very simple and this time I have mounted it on the lower tray so once the upper body is removed everything is easy to get to. I have used the same trigger system as on the R6 which is the can fixed to a piece of MDF via an metal band. The band can be tightened to hold the can but easily opened up to replace the can when needed. The trigger is a door hinge, linked to a car central locking solenoid via a metal rod. Once 12v is applied to the solenoid the rod pulls the hinge which presses down on the can spray head. The air is routed up through tubes into K9's nose. To remotely apply 12v to the solenoid the power is supplied via the RF switch so I can trigger it all remotely.
The water spray system is also triggered via the RF switch and powered by a car windscreen wiper pump. It draws water form a plastic container set into the tray and directs the water up through hoses into the sucker in the center of the eye, where it sprays out once triggered. You will notice the placement of the water pump, well away from any other electronics. In the R6 I have completely issolated it under the skirt but in K9 it is in the lower part of the body.
These two system are so simple to make and yet they provide the most fun for audiences at events. The kids love the water spray system and the compresses air is really effective when used in outside events. The compressed air has to be used with more consideration given its chemical nature.
The Compressed air system is very simple and this time I have mounted it on the lower tray so once the upper body is removed everything is easy to get to. I have used the same trigger system as on the R6 which is the can fixed to a piece of MDF via an metal band. The band can be tightened to hold the can but easily opened up to replace the can when needed. The trigger is a door hinge, linked to a car central locking solenoid via a metal rod. Once 12v is applied to the solenoid the rod pulls the hinge which presses down on the can spray head. The air is routed up through tubes into K9's nose. To remotely apply 12v to the solenoid the power is supplied via the RF switch so I can trigger it all remotely.
The water spray system is also triggered via the RF switch and powered by a car windscreen wiper pump. It draws water form a plastic container set into the tray and directs the water up through hoses into the sucker in the center of the eye, where it sprays out once triggered. You will notice the placement of the water pump, well away from any other electronics. In the R6 I have completely issolated it under the skirt but in K9 it is in the lower part of the body.
These two system are so simple to make and yet they provide the most fun for audiences at events. The kids love the water spray system and the compresses air is really effective when used in outside events. The compressed air has to be used with more consideration given its chemical nature.
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