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Search: Posts Made By: lookimback
Forum: General Electronics Technical Discussion 07-31-2018, 03:05 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

I was thinking that as the switch is turned between modes, the lights may flash on and off. Would the relay be slow enough where that wouldn't be an issue?
Forum: General Electronics Technical Discussion 07-31-2018, 02:22 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

I realize that it could still be done with the sensor by placing the transistor in series. When off, the lights would come on. But, the 30 second on delay makes it impractical. I was thinking the...
Forum: General Electronics Technical Discussion 07-31-2018, 12:35 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

It went to 5v when cut, and the headlights came on after the 30 second delay.

Edit: When I cut the wire, it was 0v at the sensor. The wire coming from the processor had 5v.
Forum: General Electronics Technical Discussion 07-31-2018, 10:45 AM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

No. Once I realized that the voltage came from the security control module I knew it wasn't going to work. The sunload sensor varies the resistance to ground, which pulls that voltage down.
Forum: General Electronics Technical Discussion 07-31-2018, 03:53 AM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

Ok, for a 1.5 second delay, I'd need to change R1 and C1 to 47k and 33f.
Forum: General Electronics Technical Discussion 07-31-2018, 02:15 AM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

Actually, I think Q1 would have to be a PNP, and pins 2 and 6 on the 555 need to be connected so they both go and stay low when the wipers are on, and then go high when off. The other way, pin 6...
Forum: General Electronics Technical Discussion 07-31-2018, 01:14 AM
Replies: 59
Views: 1,518
Posted By lookimback
Forum: General Electronics Technical Discussion 07-31-2018, 12:56 AM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

The off delay seems like a good idea even for my application, so they don't flash on and off when switching modes. I found this schematic for an automatic headlight switcher online. It didn't mention...
Forum: General Electronics Technical Discussion 07-30-2018, 11:30 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

Such as streetlights, going under overpasses, etc.
Forum: General Electronics Technical Discussion 07-30-2018, 10:22 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

I think the schematic is correct. I'll have to figure out how much current is drawn through the switch and go from there.
Forum: General Electronics Technical Discussion 07-30-2018, 10:05 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

Actually, I think the schematic is wrong. The wire gauges at the switch are too small to power the headlights directly. There must be a relay.
Forum: General Electronics Technical Discussion 07-30-2018, 09:59 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

Did some testing. It turns out that the security control module sends 5v to the sensor. As the sensor is exposed to light, the resistance to ground is reduced and the 5v signal is pulled down. I...
Forum: General Electronics Technical Discussion 07-30-2018, 12:19 AM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

From my understanding, there's limits to how many you can cascade, but the 3 I need should be fine.
Forum: General Electronics Technical Discussion 07-30-2018, 12:04 AM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

I was thinking right along those lines. I know they turn on at dusk, rather than total darkness, so I expect a lower voltage would turn them on. Also, street lights don't cause them to turn off....
Forum: General Electronics Technical Discussion 07-29-2018, 11:35 PM
Replies: 59
Views: 1,518
Posted By lookimback
Forum: General Electronics Technical Discussion 07-29-2018, 10:19 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

I didn't have the exact resistor values for the 3k and 5k. I used two 10k in parallel and two 1.5k in series. All 1/4w except R1. A 1/4w may have been ok, but R1 will dissipate almost 200mW. I...
Forum: General Electronics Technical Discussion 07-29-2018, 10:10 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

I didn't simulate the sensor voltage in the prototype. The zener I was using was too big. 1N4733A is a 1w zener. My circuit didn't have enough current for it. I found a smaller one, still 5.1v, which...
Forum: General Electronics Technical Discussion 07-29-2018, 05:41 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

I think it's working. I'm giving it 12.4v from my variac (12.4v after rectification), and I'm seeing about 4.03v output when I can get good connections. That's about what it should be. I can't figure...
Forum: General Electronics Technical Discussion 07-29-2018, 04:53 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

I'm experiencing some difficulties getting it to work on the breadboard. I've tried 3 different DC adapters which were rated 12v, 1.5amps or better. All had outputs of around 15-16v. No problems as...
Forum: General Electronics Technical Discussion 07-29-2018, 01:23 AM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

When I make a permanent one, I'll use a 4.7v. Also, I think I'll regulate the 12v because when the alternator kicks in, it should be about 14.6v.
Forum: General Electronics Technical Discussion 07-29-2018, 01:07 AM
Replies: 59
Views: 1,518
Posted By lookimback
Forum: General Electronics Technical Discussion 07-29-2018, 01:05 AM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

I'll mock it up on my breadboard tomorrow. Pretty sure I don't have a 4.7v zener, but I might have a 5.2v. That should be OK just for testing right?
Forum: General Electronics Technical Discussion 07-29-2018, 12:53 AM
Replies: 59
Views: 1,518
Posted By lookimback
Forum: General Electronics Technical Discussion 07-29-2018, 12:07 AM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

If I remove the zener, I get the 4.5v we're expecting.
Forum: General Electronics Technical Discussion 07-28-2018, 11:56 PM
Replies: 59
Views: 1,518
Posted By lookimback
Re: 03 Mountaineer Auto headlamps when wipers are on. Does this look correct?

I update the schematic. Resistors have different numbers now.
Showing results 1 to 25 of 41

 
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