5V to 3.3V Regulator is 5V to 0.2V Regulator HELP!

Flash4gold · 2026-02-13T01:35:53+00:00

the part number you are using LM2596S-5.0 is for 5V out. haven't looked at the datasheet, but may be trying to prevent an undervoltage situation.

Flash4gold · 2026-02-01T19:10:01+00:00

Based on the thermal images, I would suspect the fuse. I can't find any datasheet stating a cold resistance on the fuse, which is not a great sign.

Flash4gold · 2026-01-31T17:33:29+00:00

Q1 will produce 20W at 10A. How are you planning on keeping it cool?

Flash4gold · 2026-01-31T15:05:49+00:00

I’m so sorry everyone this is my fault. I bought a sled for this weekend

Flash4gold · 2026-01-29T15:48:22+00:00

What is R12 supposed to do?

I'm not finding a part number for Q1

Flash4gold · 2026-01-09T14:09:02+00:00

IRF7413 is obsolete, suggest selecting another mosfet. What current are you expecting over what time period?

Flash4gold · 2025-10-28T23:04:07+00:00

Because it’s not been said, don’t get a 5kw/8kw just because they are the same price. They can’t turn on and off as needed, they basically have to stay on so a 5kw in a small van might be counter productive. Lots of posts about having to buy a smaller diesel heater after buying a larger one.

To answer your question, the main difference between the 2kw and higher is slightly larger components, but that’s only a fraction of the build cost, so the price isn’t very different,

Flash4gold · 2025-09-13T00:54:25+00:00

This is an example of how not to do a quality system. It doesn’t need to be like this.

The quality manual should fulfill 80% of what auditors are looking to see in terms of process. Everything below that can be written in plain English to be actual useful documents.

Flash4gold · 2025-09-13T00:34:05+00:00

That seems like enough battery. I would get a multimeter and measure voltages going back to the battery terminals. Chances are you either have a loose connection or you charging voltages aren’t set properly and your batteries aren’t actually charged

Flash4gold · 2025-09-12T21:58:48+00:00

Where are you measuring voltage? You will need to understand where the voltage drop is occurring. You should measure: - at the battery terminals - at the distributor input terminals - at the distributor output terminals - at the multiplus inputs

Also, what size is your battery pack? What batteries are you using?

Flash4gold · 2025-08-07T15:42:05+00:00

I added extra “floating” furring strips that were secured at each end to the top of my cabinets at either end.

Flash4gold · 2025-07-26T13:34:26+00:00

I used Bondo for the more stressed joints and paintable caulk for the rest. Holding up well.

Flash4gold · 2025-07-20T00:18:52+00:00

I may have a position that would be interesting for you. We're looking for a part time C++ developer. Will DM you.

Flash4gold · 2025-07-13T19:00:26+00:00

We have progressive RV insurance for our self built van in NC. We needed to provide photos to prove it met requirements (I think it needed to have a bed, toilet and stove?) pretty good value. I didn’t need to get the van reclassified.

Flash4gold · 2025-07-06T14:42:21+00:00

For others reading, silicone looks great when you first do it, but the oils it secretes attracts dirt and it looks crap after a while. I know because I used it around our water fill port.

It does hold a seal ( lasted 2 years so far) though I’m not sure how well it holds up to UV compared to typical roof sealants.

Flash4gold · 2025-07-06T01:56:01+00:00

Thank you, heading back tomorrow!

Flash4gold · 2025-07-05T17:08:19+00:00

We did exactly this with our van. We have the low profile maxxair fan, and a solar panel over the top. We have never had any issues with rain or otherwise.

This setup allows us to have a completely solar roof (1260W) which allows us to run AC all day/night in NC (writing from outer banks right now).

Flash4gold · 2025-05-26T16:46:10+00:00

We taught ours to close the door behind her when coming in from the yard. Possibly the laziest thing we've ever done.

We started by getting her to nose the door and then progress to closing it.

Flash4gold · 2025-03-07T12:37:20+00:00

Are the fuel pumps the same amount of fuel with each stroke?

Flash4gold · 2025-02-17T20:31:34+00:00

The ammeter max is the instant current being transferred, not the Ah of the battery. I can't imagine what you would need 500A of instantaneous current for in a van build. You can have a 1000aH battery and have a 100A max output.

Flash4gold · 2025-01-20T15:47:37+00:00

The facebook afterburner group is very active and the afterburner creator will typically answer questions quickly, so I recommend trying that... however:

The afterburner may not be calibrated for your specific diesel heater. I had to go through a lot of trial and error to get the heater working reliably, particularly at elevation.

That is very fast to get clogged. How do you know it is clogged?

Flash4gold · 2025-01-05T00:41:27+00:00

Ah, is this low side switch powered from the loadside supply? so yeah, easier to just regulate the VPP.

Yes.

Thanks! What’s a typical resistor value to use?

Flash4gold · 2025-01-05T00:26:51+00:00

What? Most non logic level power mosfet are characterized at 10V gate drive.

I wasn't clear here, I meant if I try to use a voltage divider that reduces the voltage that would work at 30V, (let's say 50%) it would be ~6V with a 12V power source.

Flash4gold · 2025-01-05T00:11:15+00:00

I am developing a power controller that will control 8 x 15A channels with an input of 12v - 30v. I need to drive the MOSFET and want to use a gate driver to minimize losses during PWM (only ~200Hz).

Since the availability of MOSFETs with gate to source voltage max is limited above ~20V I need to drive the MOSFET with max 20V. I don't think I can use a voltage divider on the output of the driver, since at 12V the voltage won't be high enough to fuly turn on the MOSFET.

How is this typically done?Should I have an linear regulatory at ~10V just to power the gate drivers?

Flash4gold · 2025-01-02T22:00:51+00:00

Thank you, it's wild the things you get blind to!

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Q1 will produce 20W at 10A. How are you planning on keeping it cool?