Hobbyking LED Servo Tester - Features servo arm position/sweep LED display (inc mid-point) can test 4 servo''s at a time and also features an Auto button for variable speed servo testing.
Dimensions: 50mm x 12mm x 30mm
Operating Voltage: 4.8v~6v DC
This unit does its job as described. Manual or auto functions. It does feel a bit flimsy, but treat it kindly and it will serve you well. Can check 3 servos at once.
Worth a look.Just to correct my previous 1 star review. After modifying a battery connector to suit what was apparently the correct polarity as indicated on the case and the PC board and finding it didn't work at all, I tried using the the normal centre positive and outer negative. I'd decided I had nothing to lose and was surprised to find it worked! So to clear up any confusion it's OK to connect a standard receiver 4.8v NiMh battery to the power input. I've only tried with the negative pin towards the centre of the PC board but I suspect it won't work the other way (like a servo) but won't damage anything.
Mine was dead on arrival.
I can't think who decided to make the input power connection different from every 4.8v battery convention every radio manufacturer uses (ie ve in the centre and -ve on the side) but it does make it possible to connect the battery the wrong way round and blow up the tester. The case is very flimsy which would have been OK (just) if the the tester had worked.
Anyway, I modified a connector to suit the tester and connected it as indicated but it didn't work at all. For what it cost it's not worth the hassle to get it replaced but I'd rather have paid more for a better product.Can't say anything bad about these. Will power from either of the connectors. Have 3 modes: manual, centering, and a sweep with variable speed.very use and good quality productPower input is mislabeled on mine. Middle pin is positive for power input. Or you can input power on a servo channel too and it works the same. Used 150 as center point to center a bunch of HX500 servos.Extremely light, feels a little flimsy to hold, but works like a champ. No complaints. I use mine for centering servos prior to installation (much more convenient than using a Tx/Rx and zeroing out my trim) and for controlling throttle during motor tests. Very handy.Absolutely useless.. both me and my friend bought one of these to test our multi rotor builds... it only works when it feels like it... sometimes it does, sometimes it doesn't...
Sometimes channel 1 works, sometimes channel 1.. most of the time, it just doesn't work.. LED screen comes on, but doesn't do anythingBest value servo tester on the market - also useful for checking actual cyclic response on helis (can run multiple servos at once. 5 stars.Excellent addition for everyone's essentials box of RC stuff.