2PAC Mafia
Member
Hi guys,
I´m working on a boat where there are two pressure sensors to detect water level on tanks. Sensors are 4 to 20 mA output and we have checked that maximum output when tank is full is 8 mA in one tank and 10 mA in the other.
From the ohter side I have two different monitoring system which need 0,4V to 2V signal to interpretate 0 to 100% scale at LCD.
This means I need to convert 4 to 8 mA to a 0,4 - 2V and 4 to 10mA to a 0,4 - 2V. As power I have 24V from batteries boat but as it´s changing values I guess I would have to use a DC/DC converter to work with my adapter with a constant value. I´ve been thinking to make it using a simple transistor circuit that depending on mA at base it drives more or less power from collector, is it possible? Can you help me with design? It´s only a quick idea but I accept any easy idea to have a circuit which converts these signals.
I´ve been thinking about operational amplifiers and comparators also but I´m not sure how to do it. Thanks in advance.
I´m working on a boat where there are two pressure sensors to detect water level on tanks. Sensors are 4 to 20 mA output and we have checked that maximum output when tank is full is 8 mA in one tank and 10 mA in the other.
From the ohter side I have two different monitoring system which need 0,4V to 2V signal to interpretate 0 to 100% scale at LCD.
This means I need to convert 4 to 8 mA to a 0,4 - 2V and 4 to 10mA to a 0,4 - 2V. As power I have 24V from batteries boat but as it´s changing values I guess I would have to use a DC/DC converter to work with my adapter with a constant value. I´ve been thinking to make it using a simple transistor circuit that depending on mA at base it drives more or less power from collector, is it possible? Can you help me with design? It´s only a quick idea but I accept any easy idea to have a circuit which converts these signals.
I´ve been thinking about operational amplifiers and comparators also but I´m not sure how to do it. Thanks in advance.