I code in Arduino and build stuff but don't have engineering background and get lost when trying to figure out datasheets. Already spent few hours on these and just looking for specific advice on which diodes to use (it would be even better if someone explain how to make that determination but just pointing to the right one would be greatly appreciated).
My setup is very similar to this question and have feedback.
I have several of the three diodes at home:
- 1N4001 50V 1A
- 1N4148 50V 1A
- 15SQ045 45V 15A Schottky
Questions 1: I am getting lots of feedback when switching the larger relay. Not sure how much current larger relay requires but there is definitely a noise when switching that messes up all other arduino connected components. (this scenario is very similar to figure 4 here) Will any of the diodes listed above be appropriate in this scenario or I need to buy something else?
Question 2: I also have several linear actuators (all of them 12volt and operating at around 3amps). According to this post (figure 2), I have to use 4 diodes for each motor since they are reversing. Will any of the diodes listed above work in this scenario? If not, what model should I buy or what model zener should i get as noted in figure 3 of the referenced post? (I actually wouldn't mind purchasing Zeners instead of what I have - it would be easier to install and more elegant (figure 3 of the referenced post) - if anybody can recommend specific model)
Thank you very much.
More clarification and follow up:
Thank you, Kyle. Quick little background on the project: We are building X-wing fighter to raise money for school STEM program. The project has taken 5 years and we are just focused on finishing it. Frankly, I don't even remember how things were wired and coded (and whether I have the most recent code) and would be very nervous touching anything that has to do with recoding/rewiring that would be needed to put in transistor/mosfets (but I will certainly do this next time). the overall current setup works as is except of getting messed up sometimes because of feedback from motors. Here is the video that has background info and some of the automation that was put in and couple pictures below.
So, right now, only practical option is to put diodes around the linear actuators. I just wanted to confirm your answer (sorry, with no background and brain exhausted, I am little dense) to make sure I didn't misunderstand anything:
We want diode to have a smaller capacitor so that it charges faster and snubbs the voltage spike faster before it gets too high. This is one reason why Schottky diode would be acceptable. So, this applies to both the relay (across the coil) and the reversing DC motor (actuator), correct? Thank you