Electronics > Projects, Designs, and Technical Stuff
555 astable timer help
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m3vuv:
the solenoid valve controls an air valve that controles an actuator thats powered fron compressed gas and delivers 2ml per pulse,looking to use a 6ah sla for the power to the timer and air valve,target is have the bag of chemicals last 8 days ,then swap the sla for a charger one along with the bag,needs to fit just below the  top of the manhole so no ba kit is needed to swap the bag etc.
m3vuv:
latest plans.
Renate:
Well, this is all going to be a huge undertaking no matter how you slice it.
Going around and lifting manhole covers all over town once a week?

The pneumatic idea is cute, but do you really need a third expendable to make your life difficult?
(1: battery, 2: chemicals)

2ml/10seconds *12hour/24hour * 1 week = 16 gallons.

Have you actually tried any of this with a PC as timer, using your valve solution and measuring the current?

(16 gallons of water = 60 kg)
m3vuv:
not yet as waiting for the vale to arrive,its all up in the air untill i get some parts to take measurments,the water ppl are pushing to have us get a unit for then to trial in 4 weeks!!,talk about the heat being on.
themadhippy:

--- Quote ---16 gallons of water = 60 kg
--- End quote ---
only in the usa , its 72kg in the uk
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