AstroBuySellUK
AstroKraai
Astronomyshed
Falak Online
Collimation
Arnholm
Sweiller
Mire De Collimation Circle Aid
Image Editing
http://www.astrophotography-tonight.com/photoshop-astrophotography-tutorial/
Arduino ASCOM Focuser
http://tech.groups.yahoo.com/group/sgl_observatory_automation/
http://www.yesyes.info/index.php/diy/motor-focuser/
DIY
http://nightskyinfocus.com/diyprojects/
ISS/ Satellite Passes
http://www.heavens-above.com/
Guiding GuideMaster
Polar Alignment AlignMaster
Electronic Component
BitsBox Cheap place to buy resistor, capacitor, etc in small quantity
Bolt and Nut
ModelFixings All kinds of bolt in various sizes, etc
Latitude and Longitude on the Map
http://itouchmap.com/latlong.html
Friday 21 September 2012
Thursday 20 September 2012
VirtualDub and Castrator
VirtualDub
- Edit avi file to remove unwanted sections.
- Convert to standard avi file
- Crop and center planetary avi files.
Friday 7 September 2012
Nexstar SLT Error "No Response 17 (16)"
UPDATE: It happened again on *29 OCT 2012 after long observation night two weeks before. Same symptom with No Response 17. So, I opened the cover, disconnect and reconnect all connector and leave the mount opened. After an hour or two, it came back alive. So, was it because of bad connection or moisture built up? I have put 5-6 bags of silica gel. Hopefully it won't happen again.
When setting up my Nexstar SLT mount in preparation to observe the Jupiter late last night, I've got "No Response 17" on the handset. I've tried all the possible solutions outlined in Option 1 but still could not get it to work. I had about 3 hours of observation on the previous night, the night was cold and as usual the early morning dew starting to build up throughout the session. So, Option 2 could be a possible solution. After exposing the internal circuitry overnight, it is working fine in the morning.
Option 2. Condensation inside the mount
It is possible that condensation build up inside the mount could lead to circuit boards malfunction. As such, remove the cover to expose the circuit boards. Let it open for a couple of hours in dry condition. It might be a good idea to put some desiccant/ silica gel bags inside the mount at a safe area prevent similar problem in the future.
Option 1. Celestron support page
What does the hand control message No response 16 (and/or No response 17) mean?
"No response" means that the hand control has lost communication with the electronics board within the base of the telescope. The number following this message will indicate the address of the component that has lost communication. 16 indicates the azimuth or RA motor board, 17 the altitude (declination) motor board. Unfortunately, this number doesn't tell why the error has occurred.
To clear the no response messages, repeatedly press UNDO. This fix may be only temporary and does not address the potential underlying problem.
There are several reasons why this error message would appear. Insufficient power is the most common. Check your power supply. If the DC battery is low, the scope will be unable to communicate with the base of the telescope. If you are using an AC adapter, please make sure that the adapter is rated for an output of 12 volts DC at a minimum of 2500mA (2.5 Amps). If your adapter puts out less current than 2500mA, the scope will not be able to communicate properly. Check all power connections including the power port pin for solid connectivity.
If you have a cable in the PC port (of a mount that has a PC port) that is not connected to anything, then this can also cause the messages to appear.
The next potential causes: the hand control, the motor control circuit board, the motors, or the cables-wiring-connectors in between. Plug in the hand control to an AUX port and see if this eliminates the message. CGE DEC and RA cables are easy to check and swap around to see if it's these cables or their ports. Advanced GT mounts similarly have the DEC cable that might be the problem.
Try reflashing (updating) the motor control firmware. If you are able to update the hand control but not the motor control, the problem is most likely the motor control board.
A computer crash or communications break between your PC and the hand control during an MC update may result in either “Initializing”, blank screen, “No Response 16” or “No Response 17” messages. This will prevent your updating the MC for your mount.
To clear the no response messages, repeatedly press UNDO. Then proceed as usual with the MC update.
Other conditions caused by an interrupted MC update may need the binary file fix outlined on Mike Swanson’s NexStar Resource site.http://www.nexstarsite.com/Firmware/MCupdateInitFix.htm
When setting up my Nexstar SLT mount in preparation to observe the Jupiter late last night, I've got "No Response 17" on the handset. I've tried all the possible solutions outlined in Option 1 but still could not get it to work. I had about 3 hours of observation on the previous night, the night was cold and as usual the early morning dew starting to build up throughout the session. So, Option 2 could be a possible solution. After exposing the internal circuitry overnight, it is working fine in the morning.
Option 2. Condensation inside the mount
It is possible that condensation build up inside the mount could lead to circuit boards malfunction. As such, remove the cover to expose the circuit boards. Let it open for a couple of hours in dry condition. It might be a good idea to put some desiccant/ silica gel bags inside the mount at a safe area prevent similar problem in the future.
Option 1. Celestron support page
What does the hand control message No response 16 (and/or No response 17) mean?
"No response" means that the hand control has lost communication with the electronics board within the base of the telescope. The number following this message will indicate the address of the component that has lost communication. 16 indicates the azimuth or RA motor board, 17 the altitude (declination) motor board. Unfortunately, this number doesn't tell why the error has occurred.
To clear the no response messages, repeatedly press UNDO. This fix may be only temporary and does not address the potential underlying problem.
There are several reasons why this error message would appear. Insufficient power is the most common. Check your power supply. If the DC battery is low, the scope will be unable to communicate with the base of the telescope. If you are using an AC adapter, please make sure that the adapter is rated for an output of 12 volts DC at a minimum of 2500mA (2.5 Amps). If your adapter puts out less current than 2500mA, the scope will not be able to communicate properly. Check all power connections including the power port pin for solid connectivity.
If you have a cable in the PC port (of a mount that has a PC port) that is not connected to anything, then this can also cause the messages to appear.
The next potential causes: the hand control, the motor control circuit board, the motors, or the cables-wiring-connectors in between. Plug in the hand control to an AUX port and see if this eliminates the message. CGE DEC and RA cables are easy to check and swap around to see if it's these cables or their ports. Advanced GT mounts similarly have the DEC cable that might be the problem.
Try reflashing (updating) the motor control firmware. If you are able to update the hand control but not the motor control, the problem is most likely the motor control board.
A computer crash or communications break between your PC and the hand control during an MC update may result in either “Initializing”, blank screen, “No Response 16” or “No Response 17” messages. This will prevent your updating the MC for your mount.
To clear the no response messages, repeatedly press UNDO. Then proceed as usual with the MC update.
Other conditions caused by an interrupted MC update may need the binary file fix outlined on Mike Swanson’s NexStar Resource site.http://www.nexstarsite.com/Firmware/MCupdateInitFix.htm
If these ideas don't work, it’s best to send the mount and hand control back to Celestron for factory service.
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