Knot and pull it against the clamp jaws instead of yanking those small This way, if the cord gets pulled hard, it will tighten the Make sure the knot fits inside the hood ahead of theĬlamp jaws. Hood, tie an overhand knot in the handset cord as close as you can to To help with strain-relief, before you place the connector in the metal Unnecessary if you use a solder-type 9-pin connector,īut VERY useful for the crimp-type connector. White tool about 3 inches long with metallic pushers extending past theĮnds. Of the hood and connector on the parts wall. I've forgotten the part number, but it's in the vicinity Triola's part list, make sure you get a crimp pin insertion/extraction If you're going to use the crimp-type 9-pin connector listed in Dr. It is part# 279-286 and the color is listed as "Blue", although Radio Shack sells a 25' handset cord that is nearly the color of the ETX I just thought I'd pass along someĪdditional info that I discovered while constructing mine. I successfully made the RS-232 cable for the Autostar as per the Problem is that some crimp tools won't work. You can find them at some electronics supply houses. Pretty rare at Radio Shack, probably to keep folks from going home with I believe this is the RJ-22.These things are Any damage caused by following this tip is not the responsibility of the contributor, myself, nor America Online.įrom:ĝick Walters ( 4 pin plug is std 4-pin "handset" plug, which has the same pin You will probably invalidate your ETX warranty. May your Autostar survive, and Happy Slewing! It will hang the Autostar until the ETX is turned off. The "Clone" function does not dump directly to HyperTerminal with these settings. The LX200 Command Set can be found on the web. HyperTerminal manages to communicate with the following settings, although others might work or might be more appropriate for flow control: It has been written of the LX200 that the scope must be aligned prior to initiating control commands, and this appears to be the case for the ETX. Mind that an ill-fitting plug does not get stuck in the Autostar. I had to file a plug down to get it to fit. The 4-pin jack is NOT the same size as a standard telephone RJ11/14 plug. I have made a simple cable to connect to my PC-compatible laptop serial Pin 3: [ground? appears to be connected directly to pin 4, but I leave Looking into the 4-pin RS232 port, the pins can be numbered, L to R, as 1 to 4 respectively: (best viewed in fixed-width font) Pick up the Autostar with the display facing upwards. If you are not willing to risk frying your Autostar, don't try it! I also am not an expert in RS232 protocol, so although I can tell you what worked for me, there is every chance it is sub-optimal. The caveat is: this pinout was found by trial-and-inference it is unofficial and appears unsupported by Meade at this time. The Autostar appears to emulate LX200 commands, and I have been able to drive the scope directly from HyperTerminal as well as from the Sky Map software package (which I recommend for starters). I have determined a candidate pinout for the RS232 port on the ETX Autostar. It was a strong influence for my purchasing an ETX 90/EC as a first scope. From: Cameron Brennan ( you for your wonderful site.
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