A Do It Yourself U-solder simple water level circuit with a 555 timer and mosfet that works from 3 probes that you place down in your cell, to whatever level you choose. It works from 12volts, and send 2 wires to a 12v. pump to a vertical water tank reservoir. (tank and pump and hose and wires included) The circuit is always "on" when the electrolyte water reaches the high level exposed wire tip, the pump stops. When the cell water level goes past the lower level probe wire, it fills back up to the high level probe and stops. Very simple. Nice for sealed cells and or cells that are hard to get to, to fill them back up with water. Longer drives without stopping to fill up your cell by hand. Perfect for the "JoeCelleRator" cells & for diesel truckers. Works with electrolyte solution of 10%.  Heavier  concentrate's will require a larger resistor. A Do It Yourself U-solder simple water level circuit with a 555 timer and mosfet that works from 3 probes that you place down in your cell, to whatever level you choose. It works from 12volts, and send 2 wires to a 12v. pump to a vertical water tank reservoir.  (tank and pump and hose and wires included) The circuit is always "on" when the electrolyte water reaches the high level exposed wire tip, the pump stops. When the cell water level goes past the lower level probe wire, it fills back up to the high level probe and stops. Very simple. Nice for sealed cells and or cells that are hard to get to, to fill them back up with water. Longer drives without stopping to fill up your cell by hand. Perfect for the "JoeCelleRator" cells & for diesel truckers. Works with electrolyte solution of 10%.  Heavier  concentrate's will require a smaller resistor. Please note the pump, pumps fast, a simple check value will slow down the flow, or you have have to buy a motor controller (PWM) to slow down the flow to fit your application.  Holds a 1.5 quarts of water. Learn more here.

Designed by Les Banki who gives his circuit design away for mankind.

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