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Question: is there a way to test RAM, CPU's, and motherboards in a computer without just replacing them to see if that fixes the problem?
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Steve C's profile photoFr. Robert Ballecer, SJ's profile photo
2 comments
 
Yes... there are diagnostics that can help you stress the components to failure, but they are not consistent, nor do they tell you how to fix the overall problem of system stability.

Differential diagnosis is the key: start with the cheapest component (memory) and put in a known-good stick(s). If that solves the problem, it was the memory. If not, try the cheapest CPU that will fit that socket... then, finally, the motherboard.
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Stephen Johnson

General Discussion  - 
 
What type of batteries is everyone using for the alien x build with the 1000KV whitespy red motors and the 8" props?
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Fr. Robert Ballecer, SJ's profile photoRob Yesta's profile photoStephen Johnson's profile photo
5 comments
 
I plan to use 10" props with the 2200 battery. Looking for super smooth video. Hobby king US store has batteries and fast shipping.
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Eddie Foy

Show Ideas  - 
 
Show idea

Making PCBs at home.  Lots of methods. Pro/semi-Pro:  Positive & negative exposure.  Iron on transfers: special paper, magazine paper (recycling)  3D print artwork, sharpie.  Plus multiple etchants.  Some that  even can be rejuvenated.
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Jason Perry's profile photoEddie Foy's profile photo
5 comments
 
UV exposure gave best results. But lots of work and care needed.  Iron on was easiest.  but need to touch up with a sharpie before etching.

I haven't tried the magazine pages yet. (seemed a bit ghetto.)  Have a few boards in my head to make.  Wanna try it out.
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Michael Heinz

General Discussion  - 
 
A question about motors: If I have a motor rated for 10A is it okay to hook it up to a system that can't provide the full 10A? 

In other words, if I build a quad with four 10A motors do I have to use a battery that can provide at least 40A?
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Taylor Graham's profile photoMichael Heinz's profile photo
6 comments
 
Conveniently enough... they're 1000mah batteries, which is probably how I made the correlation.
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Ed LaBrie

Show Ideas  - 
 
Any chance of a show on making a Chromium laptop or a Boot USB? 
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Jason Marsh's profile photo
 
What's PadreSJ got on his Multi-Boot USB?

Best way to consolidate several bootable USB installers on one large USB drive?

Can I please have my MS BMR, multiple Windows installers, and some Linux live images all on one stick?
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Michael Heinz

General Discussion  - 
 
Oh, dear... I went looking at new frames and I found a couple to choose from. I'm afraid the Alien-X isn't quite for me, but can anyone give advice on which of these is likely to be more my, uh, speed?
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Wayne Hobbins's profile photoDeWayne Shorts's profile photo
10 comments
 
This is the new one I'm building and it would use the blades you have. Motors mount on top and the bottom box is all clean plate. http://www.hobbyking.com/hobbyking/store/__61389__Switchblade_200_Folding_Mini_FPV_Quad_Copter_200mm_KIT_.html
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Michael Heinz

General Discussion  - 
 
Gust of wind as I was coming in from a successful flight - I brushed a telephone line, flipped and slammed into the ground.
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Ben Reese's profile photoMichael Heinz's profile photo
9 comments
 
I don't know about that, but I did notice that if you look at the Alien-X frame on Amazon most of the things they say "also bought with" are on the Padre's parts list.
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I've been trying to plan a whole new network setup and I've heard mixed opinions about using a high end router as the gateway to the internet like the Cisco 1900 or 2900 series vs. using the firmware currently on topic in the show. I know it's a higher electric bill yet the scalability at a much lower cost is the higher price worth a Cisco router vs home build when tech support is gone in a year or two and a high end home build would give me the knowledge for my own Tech support? Fr. Robert Ballecer, SJ I've heard you talking about your own code should I let the geek in me build exactly what I want or should I keep my builds inside the network and let Cisco deal with the internet?
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todd zimmerman

General Discussion  - 
 
Sorry for the noob question, but why do WRT 54G style wireless routers have two antennas?

I want to config a pair of 54's (with DD-WRT) to bridge a network between two buildings (about 100-120 feet apart, with a few trees in the way). I want to boost the throughput and starting to look at swapping the OEM stick antennas with external (outdoor) directional antennas. Can I just use a single directional antenna on one of the two antenna leads (on both of the two APs)? If so, how do I decide which antenna lead to hook the directional antenna to? Would the remaining stick antenna still work for local traffic within the local building?

Thx in advance for any input
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Ben Reese's profile photo
9 comments
 
Depending on your budget, there are other solutions as well that will provide the range, speed, and QOS. Ubiquiti makes some great products that are pretty affordable IMO. When you figure 2 routers + directional antennas, you could get a couple of their directional access points and have a great connection (Ubiquiti NanoStation loco M2 2.4GHz Indoor/Outdoor airMax 8dBi CPE https://www.amazon.com/dp/B004EGI3CI/)

If you want more if a DIY approach, you can make your own directional antennas using old satellite dishes, aluminum foil, or pop cans. 
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Carl Elton

General Discussion  - 
 
First test flight of my Alien X. Throttle is a little slow so now I have to wait for the next Know How for the fine tuning settings. Fr. Robert Ballecer, SJ can you please bump up the show on water proofing and adding pontoons to a quad-copter I live on a lake and would like to take action shots of our Pontoon party's for our P.O.A. website.
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DeWayne Shorts

General Discussion  - 
 
Anyone here in the Chicago area and into FPV? I am working on setting up a local group and could not find one in NW Chicago. Feel free to hit me up or join the group I just started. 
#fpv   #quadcopter  
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Timothy Hamlett's profile photo
 
Wait... WUT.
Seriously, did you just say Chicago? Granted, I live on the South/East portion of the city.... But yes, I'd be interested!
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About this community

Get the know how to make technology work for you. Robert Ballecer and Bryan Burnett will show you tech projects that you can do yourself and explain everything from tech basics to advanced techniques. Share your thoughts here, or via twitter! Use Hashtag #TwitKH. Email us knowhow@twit.tv with your show ideas!

Rob Yesta

General Discussion  - 
 
Hurry $35 for 6 more hours
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adrian bazan

General Discussion  - 
 
Hello Padre, i remember saw a video from you about a drone with cable attach to send the video and the power from the ground. can you help me to find more about that drone.

thanks in advance
Adrian
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Bill Moore

General Discussion  - 
 
I found this link today and saw they make weather proof quads. Pretty awesome now you can land in water it feel safe to fly quad from boat. 
DeX 50 Quad. Standard size model is made for blades up to 12 ” in diameter. Highlights: Weatherproof; Fully Waterproof Option; Damage Control – tubes are the weakest link so quick and easy repair; Variable Size – tubes can be different lengths from 100mm to max recommended 150mm; Very Light and ...
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Wayne Hobbins's profile photo
 
Very alien looking, but a bit pricey. Just the shell is $215.
Check out the DeX Nuke. Scarrry! Looks like something that would hug you face!
http://dexmodels.com/dex-nuke/
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Ed LaBrie

General Discussion  - 
 
Ed LaBrie originally shared:
 
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RC BATTERIES & CHARGERS

I WOULD LOVE TO SEE A DISCUSSION ON WHAT PEOPLE ARE USING

I could be blind but other than a recommendation of type - I did not see much discussion on what is the best way to charge or maintain or information on best chargers, batteries etc.

What are you using? 
What charger do you use?
Have you had good luck with the batteries and charger?

So for the newbs like me that came from NICad years ago - PS: EVERYTHING has changed. And here are a few things you should know that I did not know and wish I had known.

- Balancing of batteries is something you should know about
- Charge rates seems to be very important - as in destroy your batteries important

Adapters from chargers to XT60 connectors are nowhere to be found as I have seen - and you either have to make your own or convert your XT60 to another connector?

Is there any reason not to use another battery connector - I used to use the Tamiya ones for years - I use all kinds of connectors daily in my normal job of building police and fire vehicles, I cannot see why the XT60 is any better, or worse than the other that seem to be much more RC standard (I would love to hear some input)

Hopefully this diagram helps others to get caught up on battery tech and answers some questions for others..... or at least start a discussion on what others are using and why....
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Brent Burzycki's profile photoWayne Hobbins's profile photo
8 comments
 
+Brent Burzycki
I use the "Cool" method. I have a 5.56 ammo box that I brought back from Vietnam. Carry your quads in a hard rifle case and you can clear the park of people pretty fast! LOL!
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T Nohands

Episodes  - 
 
I really like the Idea of network layers could I setup a router that would go straight to a node then run in aggregation to two wireless triband routers configured as VLAN gateways, (I have a very long building I'm working on) how ever what I mean by node is a small low power pc using the opensource firmware and connect it to a switch combing the two so the pc is the brains allowing a second firewall to the rest of the network behind the node where I have more valuable equipment without it being a NAT on NAT situation? Also setting one wireless for media and the second for phones tablets guests? Does this makes sense to you Fr. Robert Ballecer, SJ ?
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Russ Wickstrom

General Discussion  - 
 
I have a simple NAT question. I have a DSL modem which uses NAT and a separate belkin wifi router which is NOT dd-wrt compatible. The router is also using NAT, but I have both set to use adjacent ips in the same NAT space. Would I need to swap out the router to avoid the NAT within a NAT issues?
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Jason Marsh's profile photoRuss Wickstrom's profile photo
3 comments
 
+Akira Yamanita Thanks!  this idea may break a few things on my network, but nothing that cannot be repaired quickly! I'll look into this.
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Hope I'm not the first to point out that from Know How 136, 10.0.0.0/8 would represent any IP starting with 10 being available as a private IP
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Travis Hershberger's profile photoJason Marsh's profile photo
12 comments
 
And I thought 10.0.0.0/8 was only for extranets. :FacePalm:
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Timothy Roche

General Discussion  - 
 
In a recent episode,  Padre showed an ATMega based quadcopter Flight controller. I cannot recall the name of this flight controller. 
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Timothy Roche's profile photoPeter Q.'s profile photo
4 comments
 
Hey! What's is the episode? I'm interesting.
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