Electronic Assembly Help

[RichL]

You are very welcome.  Happy I could help.  Again welcome to the Synergy family!

Rich

We're family?  Can I have a loan?

You already have one of my PRC6 Charge leads and you had my tools for a week.  Any more loans and I'm claiming you on my income taxes.  Besides, anyone that works as much as you do should be giving me a loan.   

Rich

[Chris Sexton]

You are very welcome.  Happy I could help.  Again welcome to the Synergy family!

Rich

We're family?  Can I have a loan?

You already have one of my PRC6 Charge leads and you had my tools for a week.  Any more loans and I'm claiming you on my income taxes.  Besides, anyone that works as much as you do should be giving me a loan.   

Rich

ROFL


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[NKY Heli Guy]

Hey guys just wanting some reassurance on my "pig tailing" the BEC and ESC. I was able to get a hold of 16 awg wire from local hobby store. My process will be as follows:
1. Solder the ESC wires directly into an EC5 connector
2. Assemble ec3 connectors male side on BEC and female on ESC (it should not matter but thought I'd mention just encase)
3. Peal back part of the wire 1/2 inch or so on the ESC which would connect to the battery.
4. Solder 16awg wire to the exposed ESC wire
5. Cover exposed ESC pigtail with shrink wrap

See photo. Thoughts, concerns?

[NKY Heli Guy]

Trying to upload photo

[NKY Heli Guy]

Image?

[RichL]

Hey guys just wanting some reassurance on my "pig tailing" the BEC and ESC. I was able to get a hold of 16 awg wire from local hobby store. My process will be as follows:
1. Solder the ESC wires directly into an EC5 connector
2. Assemble ec3 connectors male side on BEC and female on ESC (it should not matter but thought I'd mention just encase)
3. Peal back part of the wire 1/2 inch or so on the ESC which would connect to the battery.
4. Solder 16awg wire to the exposed ESC wire
5. Cover exposed ESC pigtail with shrink wrap

See photo. Thoughts, concerns?

I soldier the ESC and the BEC wires directly into the same connector.

Rich

[NKY Heli Guy]

Hey Rich is there a problem with current if I add an ec3 as another user suggested? I worry about ripple current if that even applies to power going to a BEC or ESC.

[RichL]

Hey Rich is there a problem with current if I add an ec3 as another user suggested? I worry about ripple current if that even applies to power going to a BEC or ESC.
[/quote

Ripple currents / voltage seen on a RC model are generated by the battery in this case a LIPO.  The best way to avoid ripple is to use a high quality LIPO battery that has matched cells. Ensuring that you balance charge your packs will also help reduce ripple.  The other way to lesson ripple would be to have a bank of capacitors between the battery and the BEC (unnecessary).  The ESC (assuming you are using the CC 120) has two capacitors on the front for this purpose.  Using a additional connector for the BEC will have no effect on ripple.  Using and additional connector will increase the amount of resistance slightly in that leg of the circuit as will adding a additional length of unnecessary wire and two additional soldier joints.  My school of thought is to eliminate as many points of failure as possible such as extra connectors and extra solder joints. To answer your question, adding the extra connector is not going to create a problem other than those mentioned above.  Alan was correct when he said that it makes the helicopter easier to work on.  Having the ability to power the BEC and not power the ESC is and advantage of having the additional connector.

Rich

[RichL]

2. Assemble ec3 connectors male side on BEC and female on ESC (it should not matter but thought I'd mention just encase)

See photo. Thoughts, concerns?
[/quote]

I don't like the idea of having all male or female bullets on a connector.  If you were some how distracted you could connect a power source in reverse polarity.  Each connector should have a male and a female bullet IMHO.  I realize that both the EC3 & EC5 connectors are "D" shaped but, the plastic on the connector housing is very thin and the polarity could still be connected in reverse. 

Rich

[flyalan]

PR6's are the bomb!  I switched over about 2 months ago from EC5's.  They will handle anything you can throw at them. both amps and wire gauge. 

You do have to be careful as you can potentially connect two batteries together in series and short them out.  At least that is the one complaint I hear elsewhere.  You can purchase them in Blue and Red.  Use Red on batteries and blue on ESC.  Always connect Blue to Red.  That way can't go wrong.  I bought a ton of Red ones from HobbyKing.  Hated doing that but the price was right.  I have also bought them from Progressive RC and backbaycomputerguy on Ebay.  I saw no difference in quality.  I have marked my ESC side connectors with a black sharpie instead of using blue connectors. Either way, Red to Red and your dead .  Well at least smokin!

As with any bullet style connector, heat is your friend.  A good 200W+ soldering iron is very helpful and will prevent any cold solder joints.  I use a Weller soldering gun rated at 200 and 300W

Cheers
Alan

[RichL]

PR6's are the bomb!  I switched over about 2 months ago from EC5's.  They will handle anything you can throw at them. both amps and wire gauge. 

You do have to be careful as you can potentially connect two batteries together in series and short them out.  At least that is the one complaint I hear elsewhere.  You can purchase them in Blue and Red.  Use Red on batteries and blue on ESC.  Always connect Blue to Red.  That way can't go wrong.  I bought a ton of Red ones from HobbyKing.  Hated doing that but the price was right.  I have also bought them from Progressive RC and backbaycomputerguy on Ebay.  I saw no difference in quality.  I have marked my ESC side connectors with a black sharpie instead of using blue connectors. Either way, Red to Red and your dead .  Well at least smokin!

As with any bullet style connector, heat is your friend.  A good 200W+ soldering iron is very helpful and will prevent any cold solder joints.  I use a Weller soldering gun rated at 200 and 300W

Cheers
Alan

Well said Alan and + 1 on the PRC6 connectors.  If you truly want to know how much energy a lipo battery stores you have only to reverse the polarity once it's a mistake you probably won't repeat. 

Rich

[NKY Heli Guy]

For that reason alone Im going with EC5's


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[RichL]

For that reason alone Im going with EC5's


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The EC5 is as likely if not more likely to be connected in reverse than the PRC6 especially if you use all male or all female bullets on one connector.  The EC5's max wire gauge is 10 your ESC has 8 gauge wire.  The PRC6 is a better connector all around for the project and it is appropriately sized for 8 AWG wire.

Rich

[NKY Heli Guy]

Hello all I hope you had a good week.

I'm getting back into the swing of things and will be installing & sizing my electronics for my E5. I noticed that the wires for my BEC and ESC will need to be lengthened. 

Question 1: When extending the wires for the BEC (Western Robotics) is it better to lengthen the red and black wires or the two servo like wires that will go into the receiver/fb unit?

Question 2: Where should I mount the BEC? I noticed on a video (smacktalkrc) of the e6/e7 that Matt had it in the back on the receiver tray but mounted on the side wall. I was thinking of under the ESC tray mounted underneath. Thoughts?

[RichL]

Hello all I hope you had a good week.

I'm getting back into the swing of things and will be installing & sizing my electronics for my E5. I noticed that the wires for my BEC and ESC will need to be lengthened. 

Question 1: When extending the wires for the BEC (Western Robotics) is it better to lengthen the red and black wires or the two servo like wires that will go into the receiver/fb unit?

Question 2: Where should I mount the BEC? I noticed on a video (smacktalkrc) of the e6/e7 that Matt had it in the back on the receiver tray but mounted on the side wall. I was thinking of under the ESC tray mounted underneath. Thoughts?

All of Matt's equipment is mounted in the same place as the photos I sent you.  The BEC is under the ESC mounting tray.  You should not need to lengthen any wires.  You only need a servo extension cable for the ESC throttle wire to your FBL or Receiver.    In the photo below the helicopter is upside down, if you follow the small wires they lead to the BEC ( Says "Castle" in the picture ). Call me if you still need help.

Rich