Originally Posted by Dennis Frie

Sorry to hear about the current sensor, but hopefully the new one will be plug-n-play

Remember voltage-divider if you want to read battery-voltage.

Yea hope so too. Im actually reading on how to calculate it. Also talked to MrFliBoy on his setup.

Originally Posted by Enthlapy

Yea hope so too. Im actually reading on how to calculate it. Also talked to MrFliBoy on his setup.

Thanks for the schematic

A voltage-divider can simply be calculated by:

R2 / (R2+R1)

If you use 3S lipo something like 1:3 should do it. I would go with 1:4
R1 = 6K
R2 = 2K

That will give you 0.25 times the actual voltage.

(picture from wikipedia)

I think this is a stupid question, but in the code:

// Arduino
#if (controller == 0)

// Input from current-sensor and voltage-divider
#define voltage_divider_input 1
#define current_sensor_input 3

1 = A1
2 = A2
3 = A3
4 = A4
5 = A5

Example " #define voltage_divider_input 1" with voltage divider connected to A1 on the Pro Mini?

Originally Posted by Dennis Frie

Thanks for the schematic

A voltage-divider can simply be calculated by:

R2 / (R2+R1)

If you use 3S lipo something like 1:3 should do it. I would go with 1:4
R1 = 6K
R2 = 2K

That will give you 0.25 times the actual voltage.

(picture from wikipedia)

LOL thats where i was looking too! There is also a good video on YouTube:

Voltage divider tutorial (3 min 53 sec)

Looks like i got alot to read during winter. I'm also gonna get the SparkFun's beginer Arduino kit.

Originally Posted by Enthlapy

I think this is a stupid question, but in the code:



1 = A1
2 = A2
3 = A3
4 = A4
5 = A5

Example " #define voltage_divider_input 1" with voltage divider connected to A1 on the Pro Mini?

Exactly, you just write the pin-number you wanna use
And yes;
0 = A0
1 = A1
... and so on

Originally Posted by Dennis Frie

Exactly, you just write the pin-number you wanna use
And yes;
0 = A0
1 = A1
... and so on

Fantastic! Thank you!

Originally Posted by Dennis Frie

I might be wrong, but you seem to be using the wrong pins. It uses the analog comparator, so you should use pin 6 and 7 for video and reference voltage as shown in the schematic:


As far as I can see you have connected the video-signal to the normal ADC input (named pin A0, A1, A2 etc).

Also, please see first 10 lines in the code for pin's:
// Notes on DIY hardware pins:;
// pin 6 = PD6 / AIN0 (Reference voltage)
// Pin 7 = PD7 / AIN1 (Video)
// Pin 11 = MOSI (SPI) used for pixel-generation.
// Pin 8 = Dimming (Optional)
// Pin 9 = Fast PWM (Optional)

Can I ask why you have used A0 and A1? If it's an error in a schematic I would like to fix it

Thank

It works now !!!

Next thing is to connect the GPS

Originally Posted by p3jpaavi

Thank

It works now !!!

Next thing is to connect the GPS

PIC's or it didnt happen! Nah j/k. Glad to hear you got it. What GPS you gonna use?

Originally Posted by Enthlapy

PIC's or it didnt happen! Nah j/k. Glad to hear you got it. What GPS you gonna use?

I will put some pics tomorrow. I use this gps http://www.flytron.com/osd-headtrack...ps-module.html. Somehow I cant get to work with the OSD. The gps is working fine 9600 with anothet script. Any ideas what might be wrong ?

You connect the gps to RXI and TXO pins ?

Originally Posted by p3jpaavi

I will put some pics tomorrow. I use this gps http://www.flytron.com/osd-headtrack...ps-module.html. Somehow I cant get to work with the OSD. The gps is working fine 9600 with anothet script. Any ideas what might be wrong ?

You connect the gps to RXI and TXO pins ?

I use the exact same GPS, and the code have more or less been written with that GPS as reference. It should definitely work.
You just connect ground and 5 volt to GPS.
And connect like this:
GPS TX -> Arduino RX
GPS RX -> Arduino TX

Originally Posted by Dennis Frie

I use the exact same GPS, and the code have more or less been written with that GPS as reference. It should definitely work.
You just connect ground and 5 volt to GPS.
And connect like this:
GPS TX -> Arduino RX
GPS RX -> Arduino TX

Does the GPS rx need also be connected ? Or is it anought that the Tx is only connected ?

Originally Posted by p3jpaavi

Does the GPS rx need also be connected ? Or is it anought that the Tx is only connected ?

Only if you need to config the GPS. I use it (included in the code) to automatic set update-rate and NMEA-string settings everytime it start up.

Originally Posted by Enthlapy

PIC's or it didnt happen! Nah j/k. Glad to hear you got it. What GPS you gonna use?

Wohoo everything is working now !

Next step is to solder a board and mount it to the plane

Originally Posted by p3jpaavi

Wohoo everything is working now !

Next step is to solder a board and mount it to the plane

That's great
You might want to add the dimming-resistor as well. The dimming makes it a lot easier to read the text on a bright sky etc. You can always turn it off in the software if you don't like it.