They're also great for the Arduino Motor Shield - or simply by wiring up Arduino with the Servo library. They work great with our UltraBorg servo and ultrasonic control board, and other Raspberry Pi Motor Controllers. The unit comes complete with 25cm wire and 3 pin 'S' type female header connector that fits most receivers, including Futaba, JR, GWS, Cirrus, Blue Bird, Blue Arrow, Corona, Berg, Spektrum and Hitec. The SG92R can rotate approximately 180 degrees (90 in each direction), and works just like a standard servo! HXT500 : Gaui EP100 (originally had Mystery 3.The TowerPro SG92R micro servo! This is the latest version of the SG90, and features carbon fiber gears and control arms resulting in a massive 2.5kg torque, but just 9g of weight! HXT900 : Esky HBK2 cyclic and tail w/ Esky 704A gyro HXT900 : Blueray/EXI MA450 with Scale fuse Cyclic and Tail w/ Futaba GY240 gyro Tower Pro : Sapac 330L Electric foamie (replaced the original junk servos that were chatty) ![]() Switching to another Mystery 9g it did not do this.Īircraft I have these brand of servos in: I did my test w/ a 3 position switched channel on a spare Rx I had. It would "bounce" when returning to center. The Tower Pro servo was dated 11/09 (funny, am I back to the future? or do the numbers mean something else?) and the HXT was dated 5/08.īTW, I had one Mystery brand servo that never made it to a heli. The HXT servo just has the mfg mont/date on them and the ext (QC Passed). On the inside, however, the Tower Pro servos says "Tower Pro" with a mfg month/date on them. Not shown are the NEARLY identical QC stickers on the HXT and TP servos. Mystery also has the same copper rivots as the HXT and the wiper looks the same but the plastic case of it is slightly different on the back. The copper rivits in the HXT just seems to breath of quality to me. I don't think it makes much of a difference but the TP pot was 3K across and the HXT as well as Mystery pot was 3.5K across. The Mystery motor was shorter and had a plastic motor pinion.Īs you can see by the photos, the POTs are different. They may perform the same, but look different. The case clamping on the motors are different as well which makes me think they are likely different motors. One has the shaft of the bearing exposed, the other is covered. The motors are slightly different between the HXT and TP. Both chips had the chip numbers on them scraped off. It is not apparent by the photo but the HXT controller chip is narrower than the TP (that does not mean they are not the same though, just maybe a different chip package size. As you can see in the photos, the circuit board and controller chip of the Mystery, HXT and Tower Pro are totally different in size. It was the Electronics of the HXT and Tower pro where I noticed the difference. The gears of the HXT and Tower pro are interchangable and I could not notice a difference between the two. The case design of the Myster is different and no parts of the case of the Mystery is interchangable w/ the HXT or Tower Pro.The HXT and Tower Pro arms are interchangable. The servo arms of the Mystery DO NOT fit on the tower pro or HXT. Taking it apart, the coloring and mold markings of the Tower Pro and HXT are identical. The Tower Pro and HXT are identical cases as the best that I can determine (except the label of course). The coloring of the translucent case of the Myster is marketly different than the other 2. The first things I noticed is the case of the Mystery Servo is not even close to the Tower Pro and HXT900 cases. I also have HXT500's on all 4 of my servos in my Gaui EP100. The Tower Pro servos are only in small electric airplanes and the HXT900's are in 2 of my EXI 450 helicopters. I have no scientific tests to compare the 3 servos but I will add that I have used all 3 to some extent. So if the HXT900's had a production change, that might explain some differences. The HXT900's were purchased in the early fall of 2008. ![]() I will start off by saying that I purchased the Mystery and Tower Pro servos in the spring of 2008. Mystery servos are sold by dealextreme as well as on ebay and other places. HXT900's are only available (that I saw) from Hobb圜ity I'm starting this thread to compare the Hextronix HXT900 sold by Hobb圜ity to the Tower Pro 9g servo and the Mystery 9g servo because there has been talk that these 3 servos are the same.
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