I Have a raymarine spx5 auto-pilot controller. This has a limited output of 5A continuous (@12V). I want to use a different linear actuator that can draw up-to 15A which will cause an issue if used. I am going to use the attached H-Bridge. So that I can connect the output from the Auto-pilot directly to the input of the H bridge, thus the SPX 5 only needs to supply enough current to drive the input of the H bridge. My question is, can I directly wire the Auto-pilot DC output directly to the two inputs. They are marked on the SPX5 +/- but obviously they swap polarity to push/pull the actuator. As both channels would never be on, when pushing the H Gate Channel PA would receive +12V, PB would be @ 0V. When the autopilot controller is pulling PA would receive 0V and PB +12V.
Note I have ordered the HV version of the brige so it can take high voltage inputs instead of the more usual 5V inputs, so am hoping it will be a simple case of hooking up the O/P of the SPX to the Input of the H-Bridge. The Actuator would connect to the M1/M2 terminals and I would wire a fused 15A supply direct to the B+/B- terminals.
Not being terribly gifted electronics wise I thought I would see if my theory is likey to work in practice without causing a $1000 dollar puff of smoke!
Thanks
Note I have ordered the HV version of the brige so it can take high voltage inputs instead of the more usual 5V inputs, so am hoping it will be a simple case of hooking up the O/P of the SPX to the Input of the H-Bridge. The Actuator would connect to the M1/M2 terminals and I would wire a fused 15A supply direct to the B+/B- terminals.
Not being terribly gifted electronics wise I thought I would see if my theory is likey to work in practice without causing a $1000 dollar puff of smoke!
Thanks
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