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Hi, thanks for the reply. Sounds awesome! I'll check it out.

I've been testing with a $3 atmega328p board. I noticed sooo many things wrong with the schematic now and ideas to achieve what I'm trying to do. It's all about learning to me. Thanks again for the help.

This is absolutely correct. :) I don't know how I missed it. I'm trying again, and the average is definitely not correct. I already get accurate peak voltage and can use the map function to map the duty cycle from 0-100%. Also saves another voltage divider and analog pin + code. I only used...

Very good, thanks! Too much going on to edit the schematic now, but I'll give it a go ASAP. You seriously saved me. :)

It's for an advanced personal vaporizer. Resistance wire is wound in a coil and cotton is used inside the coil for a wick. Wick/coil is saturated with liquid made of vegetable glycerin and candy flavoring + a tiny bit of nicotine. I feel much better after doing this VS smoking cigarettes...

What do you think about using another Pfet between the high volage circuit and A10? Before turning on the high voltage circuit, I can send high signal to the gate on the Pfet. Since A11 is on the - side, would anything else be needed? EDIT:Just checking the resistance of the atomizer. Needs...

I see. Is there an example of that somewhere? I thought that's what using A10/A11 was doing. I'm very green to all of this. I tested the difference example in the ADC library with only the constant current source and A10/A11. It worked very well. You're seriously saving me here. I...

I double checked the 2.5v voltage reference(shunt type). It was working within spec. @ 2.505v with the onboard resistor/3.3v. I edited the OP with the updated schematic link. I'm not sure how the voltage divider will work, actually. I'm only reading the difference between A10/A11 when the...

Good call! I need to add another voltage divider there. I will do that. When the teensy burned, there was no voltage there, though. I will post updated schematic later today.

This is my first go at drawing a schematic. I can read it. Hope it's good enough for you to read. I destroyed a teensy when it was wired like this. If you can see something I'm missing, it would be greatly appreciated. There's no other way for me to export the schematic and have it...

I'm just starting with designspark. I really need to make a schematic to double check my circuits even though they worked on a bread board just fine. I can't find any info on a designspark library, even though I have seen the teensy 3.0 library for eagle. I think I need the *.eil file, not...

I really appreciate the discount, too! I would really like to use the teensy for my project. I'll actually record and take pictures of absolutely everything when I get it, hoping it could help someone else. Going out tomorrow.

I'll totally do that. :) Thanks! I'm comfortable enough with soldering to replace the kd20 QFP, if that says anything. I've done everything from QFP to BGA rework. I already desoldered everything getting ready to add the arduino to the project or I would take a picture. I really appreciate...

Thanks for the replies and the link.

1. I am powering the lm317 via batteries and even have a Pfet before it for reverse polarity protection. I for sure cut the correct trace. I didn't plug a usb cable into it after the initial programming and making sure everything was working correctly, only double checked that the trace was...

Hi, yes, Vin pin sorry.. The one that says 3.7-5.5v in the picture. I was a bit frustrated earlier. Should have waited to post. I'm using an LM317 and it's outputting 5.1v how I have it setup. I have an arduino I might use for the project, since I can just power it and it works. I'm going...

So, I killed my first teensy. That was my fault. Second one I used the correct pin(double checked output @5.1v) Hooked up to vcc and ground. Chip smoked. This project works fine until I try to power the teensy via VCC, then it's smoked. Any idea on this? It's only 5.1v going to Vcc.

I've been working with the teensy for quite some time on usb power. For some reason I was sure that the V pin on the 3.1 was VCC. It's dead. I already ordered another one, but I'm wondering if there's any way to fix this one. Thanks! Derp moment. I'm powering it VIA LM317 @5v. Didn't cut...

Thanks! I actually have a lm317! Totally forgot about it. This project needs at least 7.4v. Thanks for the tips.

I've been researching the best way to power the teensy externally with 2s 3.7v batteries. I would use an lm7805, but under load the batteries can go down to about 6v which is under the minimum for the 7805. Thought about voltage divider, but not sure if that would be the best route. Is any of...

Thanks for the tip! I got it to read correctly with my meter. I dropped the constant current to 10ma and it's working perfectly. Reading a 1 ohm resistor right at 1 ohms. Read down to .35 accurately, but didn't try any lower just yet. My next obstacle is getting the code to work for...

I read up on 4 wire measurement. I was trying to read the voltage across a known resistor with my dmm, and using V/I=R, I just wasn't coming up with good calculations. I used the exact same diagram as above, but disconnected the wire to A0 and was using my dmm. Do you see any error with that...

Ahh, nice. :) I'll check that out, thanks! Do you think it'll read down to say 0.02 ohms? Is there an example of this anywhere? Can research later, have to leave for second job... Definitely will, though.

I'm using an lt3092 constant current source set to 68ma via teensy 3.1 3.3v pin. Using an lm4040 2.5v voltage reference diode on aref. This just isn't acting the way it should. When I short out it out, it reads around 1 ohm. I tried to calibrate it for wire length and diameter using a 1ohm...

Thanks. :)

I just didn't know what I was talking about.. I just needed the average voltage that could be read with the teensy adc. It's working just fine now with the low pass filter, so the problem is solved. :)Switching the mosfet with teensy digital pin is working great as well. If you're curious...

I'm using the resistor because I read this and similar things when I was doing research. http://forum.pjrc.com/threads/24799-Teensy-3-0-stopped-working-after-2-weeks The low pass filter is working great so far @ 2929hz. I just have to write the code. :) I appreciate the help and patience.

Hi, I figured out that that a low pass filter should work. I was googling RMS, and you're right, not what I was looking for. I came up with tons more results without it. I can't simply guess what the voltage is, since it's a resistive load and very low resistance at that. Other things come...

Hi, my first post here. :) I'm new to all of this, but picking it up. I apologize in advance if any of my wording is wrong, and corrections are greatly appreciated. In one part of my project, I'm switching an N Channel MOSFET @ around 2khz via teensy digital pin. Controlling the power to a...