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08-29-2018, 10:29 PM | #1 |
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Join Date: Aug 2006
Location: Redmond, WA
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12V truck to 5V electronics
I made up a set of sequential tail lights that I'm thinking about putting in the back window of my cab (with an OFF switch). So a supplement to the existing brake and signals.
It looks something like this: https://youtu.be/sTI8gfHwL6k So I need inputs from the vehicle: left turn, right turn, backup, stop. If I share ground between the truck and the circuit, then I imagine I could use simple voltage divider circuits? I wasn't sure so ordered a set of small isolation relays (with 12V triggers) worst case. Thoughts? I'm not an electrical guy!
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
08-30-2018, 11:52 AM | #2 |
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Location: Parkville, MD
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Re: 12V truck to 5V electronics
I've played around with circuits a bit. I would be more inclined to do a voltage regulator.
Here is one. 16V max imput, 5V output, handles 1.5A. https://www.digikey.com/product-deta...C5T-ND/2337056 You could rip apart a Cig lighter USB charger and use whatever is inside. Surprised I am not seeing more 'plug and play' options on Amazon.
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1970 C20 Custom Camper - 350, TH350 1997 GMC Suburban 1994 Acura Integra GSR 1987 Dodge Daytona Shelby Z |
08-30-2018, 11:59 AM | #3 |
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Re: 12V truck to 5V electronics
Here is one I found on Amazon. Don't know how much I care for the company, hard to tell if they are legit or cheap junk.
https://www.amazon.com/dp/B00CBCGAL8...535644252&sr=3
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1970 C20 Custom Camper - 350, TH350 1997 GMC Suburban 1994 Acura Integra GSR 1987 Dodge Daytona Shelby Z |
09-02-2018, 12:47 PM | #4 |
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Join Date: Apr 2016
Location: Cypress, TX
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Re: 12V truck to 5V electronics
For logic signal, A voltage divider with 10K resistor at the top and 4.7V zener diode as the bottom leg would be best. Top hit on Google for voltage divider with zener shows this:
For powering the chip use a buck step down converter like one of these: Last edited by dmjlambert; 09-02-2018 at 12:56 PM. Reason: Because I can't help myself |
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