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AMX Bluetooth tach conversion / adapter |
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Greyhounds_AMX 
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Joined: Nov/14/2009 Location: Kansas City Status: Offline Points: 1268 |
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 Posted: Dec/21/2018 at 11:14am |
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Here's a short video of the dimming. It's a little glitchy simply due to the crusty nature of the potentiometer in the headlight switch, but overall much better than stock.
The dimmer puts out about 9.3V to 11V, and the Arduino code looks at that range and brightens or dims the LEDs proportionally via pulse width modulation. Generally, if you use LEDs inserted in place of the standard dash light bulbs they won't dim correctly, as the voltage range coming from the dimmer is just too narrow to make a visible difference, so you end up with just on or off pretty much. Edited by Greyhounds_AMX - Dec/21/2018 at 11:18am |
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1968 AMX 390 w/T5
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343sharpstick
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Joined: Mar/10/2010 Location: Wisconsin Status: Offline Points: 554 |
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Posted: May/20/2019 at 3:33pm |
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Any info on making these available for sale? |
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billd
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Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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Posted: May/20/2019 at 7:37pm |
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Apparently it's different with the later switches as it's not too bad with my Eagle - granted, not ideal like your system, but it does dim some before off. But I actually like them full bright anyway.
Will be watching progress on this as I do have plans for the 73, ignition and lights.  |
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Greyhounds_AMX
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Joined: Nov/14/2009 Location: Kansas City Status: Offline Points: 1268 |
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Posted: May/21/2019 at 6:05am |
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Right now I've got the front of the engine all torn down for a water pump swap, ac, radiator, and electric fan upgrade, Once that's back together I'll be able to put some driving time in and see how the tach works.
Sorry it's drug on so long, I'm kind of slow and deliberate.
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1968 AMX 390 w/T5
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Greyhounds_AMX
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Joined: Nov/14/2009 Location: Kansas City Status: Offline Points: 1268 |
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Posted: Nov/27/2019 at 12:55pm |
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Update on this project:
The tach works well, as do the dash lights. But this winter I'm going to revamp the circuit completely to use beefier mosfets for the LEDs just for added safety margin, and to take advantage of the relatively new Arduino BLE nano. It's a nano with built in bluetooth, designed for short distance applications (perfect!). I'll update you guys as it progresses. Once it's all done and working we can contract a build house to do the boards and populate them.
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1968 AMX 390 w/T5
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farna
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Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Online Points: 19691 |
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Posted: Dec/01/2019 at 9:02am |
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Ggreat work!
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Frank Swygert
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bdatkins
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Joined: Jan/14/2020 Location: Indiana Status: Offline Points: 1 |
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Posted: Jan/14/2020 at 6:48am |
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Great write up! I am actually working on a similar project for my jeep CJ. Any chance of your sharing the arduino code?
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Greyhounds_AMX
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Joined: Nov/14/2009 Location: Kansas City Status: Offline Points: 1268 |
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Posted: Jan/14/2020 at 12:08pm |
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Certainly! PM me your email address and I'll send it over to you. It's a little odd due to the back and forth that goes on between the Arduino and the Android app, and could probably use a little cleanup of course, but fundamentally does the job.
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1968 AMX 390 w/T5
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tomj
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Joined: Jan/27/2010 Location: earth Status: Offline Points: 7555 |
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Posted: Jan/14/2020 at 11:16pm |
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Hey that's really great! How'd I miss this thread when you started it?
You could add another MOSFET, and a little speaker, and re-create in software the MSD adapter buzz for those who miss it! lol Very nice work, and a clean board. Yeah, OSHpark is great. |
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1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5 http://www.ramblerLore.com |
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mbwicz
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Joined: Feb/20/2019 Location: Buffalo, NY Status: Offline Points: 2001 |
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Posted: Jan/15/2020 at 9:06am |
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Nice work, I'll be interested in buying one when you are ready. My car is still in the early build stage, so I've got time to wait until you are happy.
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1970 AMX, one step forward, one step back. Both steps cost time and money.
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