Category Archives: Uncategorized
How do I come to terms with the Gcode Work Zero blah blah?
cindy’s laptop
Aquaponics stuff
// Watch to assure the water level swings above and below 2.5 volts every so often
// Code From: Controlling a servo position using a potentiometer (variable resistor)
// by Michal Rinott <http://people.interaction-ivrea.it/m.rinott>
#include <Servo.h>
Servo myservo; // create servo object to control a servo
unsigned long time; //Initialize HiVolts, HighTime, LowVolts, LowTime,
int potpin = 0; // analog pin used to connect the potentiometer
int val; // variable to read the value from the analog pin VoltIn
void setup(){
myservo.attach(9); // attaches the servo on pin 9 to the servo object
Serial.begin(9600); //Open a Serial Port
}
void loop(){ //start a loop
Serial.print(“Time: “); //Test Print Current time
time = millis();
Serial.println(time); //prints time since program started
VoltIn = analogRead(potpin); //input voltage (value between 0 and 1023)
VoltIn = map(val, 0, 1023, 0, 179); // scale it to use it with the servo (0 and 180)
myservo.write(val); // sets the servo position according to the scaled value
delay(15); // waits for the servo to get there
if VoltIn > HiVolts //if voltage is higher than old high, and higher than 2.6
if VoltIn > 2.6
HiVolts = VoltIn // set HiVolts to voltage
HighTime = time // set HighTime to now,
LowVolts = 2.5 // set LowVolts to 2.5
if VoltIn < LoVolts //if voltage is lower than old low, and lower than 2.4
if VoltIn < 2.4
LoVolts = VoltIn // set LowVolts, to voltage
LoTime = time // set LowTime to now
LowVolts = 2.5 // set HiVolts to 2.5
if abs(LoTime – HiTime) > 10000 //if ABS(LowTime – HighTime) is too long
Serial.print(“Time of failure: “); //send error
Serial.println(time);
delay(2000); // wait so as not to send massive amounts of data
} //end loop
What are the details for the 2014 robotics class?
Robot Base from Hobby King
L293D power drive chip
Here is the link to a good lm293 guide
http://m.instructables.com/id/Control-your-motors-with-L293D-and-Arduino/step3/Arduino-code/
with a larger blow up of the L293D on a prototype board
Shipping for HC05 Modules EBAY tracking
http://vod.ebay.com/vod/FetchOrderDetails?ViewPaymentStatus&transId=1224051213018&itemid=281348747108
Shipping for Arduinos ada fruit order 530186-5768100666
Here is a simple front/back, left right robot control on instructable
http://www.instructables.com/id/Control-DC-Motors-with-your-Smartphone-Perfect-for/
___________________________________
I the site we used to wire the motors is
Instructables
http://m.instructables.com/id/
The simplest android phone software is at tech bitar.
He has a very simple interface that toggles any pin on the arduino high and low.
http://www.techbitar.com/
John David was able to get his bot rolling using that combination.
The final puzzle piece is MIT App Inventor. That would facilitate a real controller interface on the phone.
I would love to do a Saturday follow-up this fall.
By the way. The motors are wired in series to slow the robot down. I think that was a mistake. I think they should be wired parallel to allow full battery voltage to drive each motor.
Jenny is setting up a saturday, so if you are interested please get in touch with her.
Good luck and keep in touch
nice write up of a HS robotics class
http://makezine.com/2015/01/05/losing-to-my-high-school-class-a-big-win/
how do we set up n2 and o2 in san antonio?
Airgas San antonio
What are the details for the June 10 Robotics class?
How do I come to terms with a Honeywell MK V EGPWS?
How Often should I install a EGPWS database?
Our ICA’s for the installatins on BMB and BZZ do not require ANY update, EVER.
Many N registered aircraft are never updated, until upgrade time.
That seems a little slack.
The Honeywell website informally recommends this:
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So, how about twice a year?
here is the schedule of database release dates.
http://www51.honeywell.com/aero/common/documents/egpws-documents/Maintenance-documents/SIL-documents/MKV-VII-documents/SIL_MKV_MKVII.pdf
here are the kown issues;
bottom of the page “RAAS Known Issues”
Click Here to download database:
htthttps://www.honeywellaes.com/redirection?Operation=1&heading=Business&subheading=egpws
same password as NZ2000 data base. call 800-247-0230 to get to account access
Must be OMNI Drive LF for linear format.
Only good for MK5 and MK7
If you have a 6 or 8or 22, you must also have smart cable.
SIL468
AES website
For realtime troubleshooting, Here is the Winviews text:
11 APPENDIX A: WINVIEWS
WinVIEWS (Windows Virtual Interface to the Enhanced Warning System) is a software tool developed by Honeywell
to monitor or view values within the EGPWC, and perform certain test interface functions.
Overview: The WinVIEWS software provides a monitor function that does not alter the operation of the EGPWS.
The monitoring of the values assists in the testing of the EGPWS by allowing the operator to quickly determine if the
correct signal and scaling is being used by the EGPWS. Additionally, WinVIEWS provides a detailed status of the
software configuration and input signals, which enables quick identification of system anomalies. WinVIEWS is also
utilized for programming the Configuration Module in MK VI, MK VIII, and MKXXII applications.
To obtain a copy of the WinVIEWS software, please visit www.egpws.com, select the Installation Information page,
then select the Diagrams, Drawings & Software sub-page. WinVIEWS is available as a self extracting .zip file. A
User’s Guide is available there as well.
In addition to the WinVIEWS software, a command file may be utilized. The command file is a simple text file that
includes each Current Value Table (CVT) Item used in a test procedure. The file must be ‘text only’ such as those
created in the Microsoft Windows NotePad program. It should have a filename extension of .wvc or .cmd. The
webpage mentioned above also contains generic command files for use in ground and flight testing the various
EGPWS models.
To use WinVIEWS a RS-232 cable (PN 704-2670-001 is required) to connect the PC 9-pin comm port to the
EGPWC 15-pin test port.
Typical WinVIEWS operation with the EGPWC:
1. Connect the PC to the EGPWC via the RS-232 cable defined above.
2. On the PC, start the WinVIEWS program (requires Windows 95 or later).
3. WinVIEWS opens in the Terminal Mode. Various commands are available in this mode. Type “HELP” or “?” for
command help. In particular, CVT Items may be added or deleted to/from the display to assist with system
analysis.
4. Under the File Menu select the “Load Command File” option and load the appropriate Command File.
5. Use F6 to select the Display Mode: each CVT item listed in the Command File will be continuously updated at a
rate of at least once per second. The value shown for each CVT Item listed is the current value used by the
EGPWS. F6 toggles between the Display and Terminal Modes.
___________________________________________________
here is a typical interface
How do I come to terms with an “Imperial” valve in a Aeronca 7ac?
Good Fuel Valve Gone Bad….
My family has owned and operated a 7AC since 1976, with many happy years of flying, kiddo’s soloing and so on. Good lord willing, there will be many happy years of that in the future.
Since I was old enough to pay attention to the airplane, the fuel valve has been a recurring nuisance. Every couple of years, we have rebuilt the valve, carefully polishing the mating surfaces with jewelers rouge, replacing the packing, leak checking on a bench stand, to varying degrees of success. Recently, the valve had become difficult to turn, but other than that, it worked correctly, and did not leak.
We experienced an occasion where the engine lost power, and later investigation revealed the torque rod was not fully selecting the valve OPEN.
After that difficulty we decided to install a “Burl’s Alaska” PMA fuel valve. Plenty of info at www.burlac.com.
The (choke…) $400.00 valve arrived and we fitted it, after ordering new AN fittings for the fuel line.
The documentation was surprisingly complete, and included the STC, PMA paperwork and an approved drawing to modify the existing torque rod to the fuel shutoff lever.
All in all, the valve and associated machine work looks first rate. The STC documents are in order, and we are hoping for many years in service in the future.