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Building the ServoBoss, a servo tester from GadgetGangster.com

Building the ServoBoss, a servo tester from GadgetGangster.com

This is the ServoBoss. It is a servo tester capable of driving up to twelve servos simultaneously.
The kit is available from GadgetGangster.com





It currently has eight programs.

Program 1 - Set milliseconds
Adjusts output to twelve servos (two groups of six) in .001 millisecond increments using pushbuttons. Displays pulse-widthsetting on LCD for both groups. The second group is reversed in all programs except for Dead Band.

Program 2 - Adj milliseconds
Using a pot, controls twelve servos while displaying pulse-width on LCD.

Program 3 - Dead Band
Alternately sends two pulses differing by X microseconds. X is adjustable from zero to 99 and is displayed on LCD. Increase the setting until servo jitters, then back down by 1 uS increments to find the Dead Band.

Program 4 - Cycle Servos
Enter High End, then Low End, then number of cycles, transit time and finally, the pause time. If number of cycles is 0 it will run indefinitely. Transit time is adjustable from 20 milliseconds up to 60 seconds. Pause time is adjustable from 0 to 60 seconds - anything under 10 milliseconds is ignored.

Program 5 - Sweep Servos
This program is nearly identical to Cycle Servos except that a button press is required for each stroke.

Program 6 - Set Three
In this program you set three pulse-widths. One each for Low, Center and High. Press one of the three buttons and it sends the servo(s) to the corresponding setting.

Program 7 - RX Input
Connect your RC receiver or other servo signal producing device and read up to six channels. Displays pulse width in 1 uS resolution. The incoming signal is passed on so that you can control your servos while reading the pulse widths.

Program 8 - Battery Pack Test
Displays voltage of battery pack, .01 v resolution, a few hundreths of a volt accuracy. This program always runs at start up. Good for checking for charged packs - just plug it in - no button presses required.

 
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Step 1Organize your work space!

Organize your work space!

Clear a well lit space to assemble the kit and get your tools together.
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25 comments
Sep 9, 2010. 9:06 PMTheGimpAddict says:
How many servos do you think this think could handle if you used a wall wart to power it? I'd prefer not to use a battery pack and I need to power 5 high torque
servos.

Thanks,
TheGimpAddict
Jul 5, 2010. 9:34 AMTheGimpAddict says:
What battery does the Servo Boss use?
Apr 1, 2010. 10:29 AMTure Jr. says:
To me, a "special instruction" is some information that does not appear available to resolve a problem by observation or reasoning.  An example:

The LCD has 16 pins.  Installation of the socket header starts at C 1.  However, C 16 is occupied by the 103 cap to the pot.  Some resolution is required. 

Another possible consideration might have been the mechanical interference posed by the crystal and the adjacent 104 decouplling cap as with the mounting of the 100K ADC, but are resolved by viewing the expanded "original" view.
Mar 31, 2010. 6:48 PMTure Jr. says:

Where are the readable diagrams in step  3 & 4 of ServoBoss for wiring the back side of the circuit board as above and any other special instructions?
Mar 31, 2010. 10:55 PMTure Jr. says:
The layout is located @ instructables.com/files/orig/FL7/CKGR/FWMNXWIA/FL7CKGRFWMNXWIA.JPG.  Special instructions have not been located.
Mar 14, 2010. 6:45 PMPC-GUY says:
Hi  Rich, Sorry that I haven't been around for a while. Work has been placing a load on me. Have you worked out all of the bugs yet? I'm really looking forward to getting my hands on this little toy. I'm toying on doing a "Show-And-Tell" at my local model airplane club. I would also like to know the price for both one piece and several ( your decision on how many ) so I could generate some interest at the club.  Any ideas when you might be convenient for you? 


Also before I forget; How would I go about sending you payment data in a secret and secure format?  Thanks.


  Take care.

Tom

Mar 4, 2010. 9:42 PMPC-GUY says:
Hi Rich. I thought that I would just check in and find out the status of your great project, the servo tester / exerciser. The last that I heard you were dissatisfied with some parts you have seen. Please let me know when you are ready to ship. BTW I have no problem paying you but I'm not cool with publishing my personal info in this area. 

Take care and 73


Oct 22, 2009. 9:53 AMjwzumwalt says:
Who do you use to make your PCB boards?
Thanks, JZ
Feb 14, 2010. 7:14 PMPC-GUY says:
Hi Rich. Long time no e-mail. I just read that you have made the Servo Boss available. Where can I contact you to arrange a purchase a kit from you? I want to use a credit card to purchase it from you and I feel more comfortable using a conventional website. If you have another suggestion I'm open to listen to what you have to offer.

I await hearing back from you.

PC_Guy
Oct 22, 2009. 1:00 PMjwzumwalt says:
Thank you for your quick reply :) The reason that I asked is the low price that is offerd for the kit. The pcb makers that I have looked at charge about $25 or more until you order 100pc or more. How can you offer a low parts count project at such an offordable price?

Thanks, JZ
Oct 20, 2009. 7:17 PMPC-GUY says:
I like your project. Problem is that I don't have the free time to part out the whole thing.  I could squeeze in the time to assemble if it came as a full up kit with the premade circuit board was included. Is there any chance that you could be persuaded to issue a full kit?  Please let me know. Thanks for your time.

TC
Dec 22, 2010. 2:33 AMPC-GUY says:
The best news I've heard all day. Thanks I needed that.  ;-)    Please let me know when it hits the street. BTW, I'm strictly a hardware guy. I tried to write code in computer class in 1985 and man did I stink at it. Machine language, (101101) Assembly (LDA SLF etc..) so please if you have a way to burn the code in as one option, PLEASE do it. I build pc's when ever I need to update my current workhorse but I just can't write code. Damn. You can't imagine what I would give to write good code. That has forced the postponment of several interesting projects. Ahhh well I digress. I gotta hit the sack. Good night and 73.


Oct 21, 2009. 8:02 PMPC-GUY says:
Hi Rich. I look forward to the the public release of your product. As far as the my learning to program, I will have to pass for now. I'm currently trying to learn Linux well enough to be able to repair anything that pops up on my as well as anybody elses'  pc.  I am trying to keep up with the march of technology and boost my knowledge of more operating systems. I don't estimate my progress being really quick due to my work load vs projects that are at various stages of development. I'm trying to get my rc pilots license. I'm also contemplating going for my radar endorsement. I'm also debating building a new machine for Windows 7, or waiting USB 3 hits the street.  So you can see a little of what I'm up to.  ;-)
Jan 2, 2010. 8:33 PMPC-GUY says:
Hi, Rich. I just surfed in to check on the status of your servo driver / tester. Have you managed to assemble a complete kit all of your revisions and a arranged to market it as a kit with all of the parts and a case included? I hope that you have because I like what I see in it. I haven't built a good electronics kit in all too long. On another note, I would hope that your tester / driver can operate on 6 volts rather than just 5 volts like the driver that I own. Take care and be well.

TC

73
Nov 5, 2009. 11:42 PMjefffrancis254 says:
 Hi  Rich,  I'm working on the Servo Boss but am having trouble reading the details on the jpgs.  The quality of the images is not too good.  It would be helpful if there were links to higher resolution, larger images to look at.  Also when is the custom board going to be availabe?  Thanks

Jeff F.
Nov 6, 2009. 12:39 PMjefffrancis254 says:
 Thanks,  I didn't know about that.  Much Better.

Jeff

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