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Fr. Robert Ballecer, SJ
owner

General Discussion  - 
 
Ok KITAs, this cute little ball of doge is the new KH mascot... and he needs a name.

Put your suggestions in the comments below, we'll pick the best, then open a poll to decide on a name for the Know Corgi!
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Riley Kaufman's profile photoMichael Gee's profile photo
28 comments
 
Nicole T
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izaya orihara

General Discussion  - 
 
so when is the new mascot poll coming up and tater tot is a great name 
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Fr. Robert Ballecer, SJ's profile photo
 
We're going to put it up as soon as we get to the airport!
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Ralph Mills

General Discussion  - 
 
What's a poor ol' man to do? No 3D printer, no maker space and more important NO money. Go Cheap and Stay Home.
 
My Cheap $4 PCB Drill Jig.
A re-purposed 12Vdc 1A wall wart, 1"x 3" Lumber, Scrap Pine Board, 2 pencils. Momentary push button switch, Spring, Power 2.1mm barrel connector, 1.5 inch hose clamp, wire, screws, zip tie and the Banggood $4 USD Drill and bit combo. (only thing I didn't have laying around.)
http://www.banggood.com/12V-Small-PCB-Drill-Press-Drilling-With-1mm-Drill-p-929516.html
Oh and I used some of the packing material to deaden the rattle between the motor and clamp.
Not for close tolerances (a lot of "play" in there) just a quicker means to drill a dozen or more holes in pads on my Single sided PCB projects than a pin vise.
KE5QKR Emile Diodene I hope once again to have my project recognized as "Cheap Old Man" Compliant.
I'm sure the people over at TWiT's Know How could design a 3D print that would be prettier and allow more precise drilling. I highly doubt it could be cheaper!
73 de AB1OP_Ralph

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Eddie Foy's profile photo
 
Love it! But started down that route and went for smt, no drilling (well for most of the pcb ) no tearing off pads,. ( but need the eyes for drag soldering )
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Jim Hofmann

General Discussion  - 
 
I'm dusting off my Lunchbox and would like to automate it with an Arduino.

I was able to control the front wheel servo, fairly basic. However, I cannot figure out what kind of signal to use on the Tamiya TBLE-02 ESC. I know it's PWM but what frequency? How does reverse work? 0-127 forward, 128-255 reverse? So confused.

I have used Adafruit Motor Shield V1 which used PWM lines for control with forward/reverse. I can "try" using the Adafruit code and see what happens but ... little concerned about letting the magic blue smoke out.

Any web sites or tutorials ld be helpful.

Thanks
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Jim Hofmann's profile photo
 
OK, spent way too many hours looking at the AF Motor Shield. Turns out it takes 2 PWM and a couple control lines which are muxed thru a serial to parallel shift register. Don't think that's the answer.

SOoo, I took a chance and hooked it up the ESC to the Arduino with a pot & PWM out. 0 to 127 is 100% to 0% forward. 127 being 0%. So 128 to 255 "SHOULD" be 0% to 100% reverse. OK, so on the tranceiver you have to go reverse, neutral then reverse again to get it to backup. Still no movement.

I can go forward really fast. Post if I figure it out. CAn't be that hard ... Rrrrightttt.
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Vincent Panico

General Discussion  - 
 
Is it worth to buy a new laptop or replace the motherboard in a Toshiba satellite P75-7200 it's 17 screen 700gig HD and dual HD bay also it's a i7, its 3 years old advice please thank you...
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Vincent Panico's profile photoJosh Frye's profile photo
9 comments
 
Then I say go for it, nothing like finding out how something works. Unless you have to keep buying or making the tools to do the job. But you have that beat.
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Lee Donnahoo

General Discussion  - 
 
Replacing a hard drive in a relatively laptop with an SSD. Any recommendations on an easy-to-use/free HDD imaging tool? 
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Seth Leedy's profile photoLee Donnahoo's profile photo
6 comments
 
FYI- I already have an SSD I plan to use for this procedure and a USB housing for it. I just need the imaging tool. 
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Peter Hanse

General Discussion  - 
 
If you Fusion 360 for commercial work get it on sale September 28. $50 for one year $80 for 2 years. http://www.autodesk.com/store/products/fusion-360?term=1year&support=basic
Create 3D CAD models for industrial and mechanical design in one easy-to-use, integrated cloud-based tool for product design.
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David Wiggins

General Discussion  - 
 
+Fr. Robert Ballecer, SJ I was just watching the AquaVase Top episode (246) at work and noticed something about when you were joining the two segments.

If you sized your pilot hole (the one Brian's phone lit up) to match something like a pencil (or something printed, I suppose). You could then line up the holes simply by threading the pencil on both segments. If you have two matching holes on the parts to be joined, it makes it easier to join the segments. 
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D Funk's profile photoDavid Wiggins's profile photo
2 comments
 
Hehe, yeah. That's why I was thinking pencils.
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Ralph Mills

General Discussion  - 
 
 
Adventures in Arduino continued: Sorry for the poor picture. Just showing the Nano attached to a $2 USD 1602 LCD mounted on perfboard with a 10Kohm contrast pot and a 220 ohm backlight resistor. Display reads "73 de AB1OP" and the seconds since last reset. I have a second 1602 LCD I want to attach to an I2C serial display adapter to be able to reclaim four of the Digital I/O pins used in this arrangement.
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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!

Bostjan Cadej

General Discussion  - 
 
Hi
I have some questions about batteries and electricity.
First a general question. Does it matter if I use battery with 1 V and 10 A – can I also use battery with 10 V and 1 A? Does it matter?

Second question. I have 5 V battery on which it also says 700 mAh. Can I replace this battery with 5 V with 1400 mAh?

Thanks for answers.


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Riley Kaufman's profile photoBen Reese's profile photo
2 comments
 
1V, 10A and 10V, 1A have the same wattage but aren't necessarily interchangeable. Typically the power source will determine the voltage and the load will draw whatever amperage it needs. For example, if you have 240V service and you connect a 60W bulb then the light will draw 0.25A. If you connect the 60W bulb to 120V service, it will draw 0.5A. In both cases the service might have a 15A breaker/fuse, but the load will only use the amperage it needs. 
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Carson Black

General Discussion  - 
 
Some footage from my last drone race. Was having some tuning issues. Of course, I managed to figure it out THE VERY NEXT DAY!!
https://youtu.be/7ugxZIYna9c
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Jason Perry

General Discussion  - 
 
Is there a way to reprogram a quick launch button on a Roku? 
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Jason Eckelstafer's profile photoJason Perry's profile photo
7 comments
 
I may have to rip it apart and see what's in there. 
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Jason Perry

General Discussion  - 
 
Communicate without cell, wifi & satellites using your existing smartphone. Relay messages through other users to extend range!
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Jason Perry's profile photo
2 comments
 
I am starting to think one of these needs to be attached to a MQTT broker
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Gregg Ordon

General Discussion  - 
 
Does anyone have any experience with IDS (Intrusion Detection Software)? I run an IT company and I am am looking into implementing some of these solutions for our SMB's in order to monitor networks more efficiently and understand where a threat can be coming from.

Thanks in advance.
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Scott Snodgrass (Datallboy)'s profile photoDavid Wiggins's profile photo
3 comments
 
I've been using SNORT on my pfSense installs for a while now. They have various tiers of rule/signature updates, including a decent free one. It takes a bit of time to dial in to recognise and cut back on false positives, bit once done, is amazing.

Security Onion is also a good analysis tool. I'm working on exporting my SNORT data to that for further analysis. My goal is to use a single SO dashboard to monitor several pfS instances.

Also there is Suricata. It has a large following, (and is security onion supported, I believe) but I haven't used it as of yet.
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Richard Craver

General Discussion  - 
 
After following Jason Perry 's discussion of domain providers, I'm curious who the Know It Alls are using for hosting. I'm current using GoDaddy's Deluxe Linux Hosting with cPanel to host 3 blogs (1 and 2 dormant subs).
I'm looking for an inexpensive plan with email and LetsEncrypt capability.
I used HostICan a few years ago and it was a hassle getting my domain released and DNS switched, took about 2 weeks as I recall.
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Richard Craver's profile photoKeith Mallett's profile photo
4 comments
 
Hey +Richard Craver that's good. Let me know if they support LE. I have had clients who have had trouble with Go Daddy as well. Here is a warning for you - leaving them is like a bad divorce so be prepared to deal with your bank.
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Lance foxcoon

General Discussion  - 
 

+William Burlingame since I support ingeal downloading I normally wound help someone like Napster user but most Windows, Mac, and Linux jukebox apps have in their an way to appfy and deappfy songs. If not apps like the free Audacity can also me used. But since most of us use thing's like Itunes, windows media player, VLC, Real Player, and XBMC I wound see if what you
have can do that for you 1st.



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Lance foxcoon's profile photoJason Marsh's profile photo
5 comments
 
Hold on a second there, +Lance foxcoon. +David Wiggins is trying to actually help someone solve a problem here. Let him.

<NOT HATE SPEECH>
Though I can speak enough German and Spanish to survive where they're spoken, I don't post in German- or Spanish-language forums because I'm not fluent in those languages. I'd rather not waste my time or that of the other forum members. If I need to seek technical advice I do so in a forum where I can reasonably expect to be understood. If that's not common sense, then I think we're all doomed.
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Jason Perry

General Discussion  - 
 
All I have to say is, wow, it is easy to switch domain providers. 
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David Wiggins's profile photoBen Reese's profile photo
10 comments
 
+Jason Perry I'm still using the email forwarding in Namecheap. Makes it super easy to setup custom aliases for signing up to new websites, sweepstakes, etc. If I start getting spam to one of those aliases, I know exactly who sold my address. My goal is to create a mail server so I can do outbound messages from those accounts, but haven't gotten that far yet. 
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Jason Perry

General Discussion  - 
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Ben Reese's profile photoJason Marsh's profile photo
2 comments
 
+Ben Reese I don't see why it couldn't be done. There's a lot of heat that is going to escape; might as well harness it.

We had forced air tent heaters that used thermo-electric generators to power the electronics AND the fan. They have a battery to get started, but once the unit is running it's self-powered. We used a string of four during the ice storm of '08 or '09 to heat a reinforced concrete barracks that held about 300.
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William Burlingame

General Discussion  - 
 
I have nearly 9000 files of music. I've downloaded some from Napster and ripped some my CD collection, LPs and even some from cassette tapes. I prefer to listen to the music from my own collection rather than stream from an online source. I do have one problem. The volume levels are not consistent. I sometimes have to adjust the volume control as it goes from one track to the next (shuffled). It there an easy way to level the volume on my collection of music?
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