SparkFun Electronics Commentsurn:uuid:214d0e4e-f1b1-d287-ce26-ac5b4c9f82492024-03-29T05:14:20-06:00SparkFun ElectronicsCustomer #1343107 on DEV-14328 - SparkFun Pi Servo HATCustomer #1343107urn:uuid:60e9987e-2380-a7e5-c837-dfaa009af7912018-12-30T01:58:55-07:00<p>I'm driving 4 large servos from the sparkfun servo hat off a pi3b+. I've removed the solder on the hat. I have powered the Pi and the hat with separate 5v 2.1A usb power supplies. A green light appears on the hat, I'm using python and get the error on the line (bus.write_byte_data(addr, 0, 0x20)). Error: IOError [errono 121] Remote I/O error. Any ideas? I've treid with only pins 1-8 connected from the pi to the hat (jumper leads) and only the sda/scl connected. I get the same error both times. Can someone do a tutorial on removing the solder and which wires need to be connected to the pi at a minimum via jumper leads?</p>
SFUptownMaker on DEV-14328 - SparkFun Pi Servo HATSFUptownMakerurn:uuid:6b93af81-fbd0-35d8-d923-978b917e7c362018-02-21T10:03:16-07:00<p>How many servos are you attempting to drive? Can you pipe in power directly via one of the unused servo power pins? That'd be my solution.</p>
Customer #893540 on DEV-14328 - SparkFun Pi Servo HATCustomer #893540urn:uuid:f4986023-3736-ae12-9464-012f214126022018-02-20T15:44:15-07:00<p>I am attempting to use this with servos that are standard size (though they are high torque..), and it seems like the current draw is still too much for this board when I've removed the blob of solder to have all power going to the servos. I have no problem using multiple micro servos.<p>Is there a way to supply additional power to the board to deal with this?</p></p>
Customer #1267880 on DEV-14328 - SparkFun Pi Servo HATCustomer #1267880urn:uuid:c0fde7de-fe58-fcb1-d688-b6ad70d176b82018-02-02T12:03:56-07:00<p>Awesome, thanks for the quick reply!</p>
SFUptownMaker on DEV-14328 - SparkFun Pi Servo HATSFUptownMakerurn:uuid:ad3ddadf-bb05-6450-b4b7-7a8cd37de6772018-02-02T11:36:46-07:00<p>I don't see why not. They're both based on the same chip and they operate from the same principle.</p>
Customer #1267880 on DEV-14328 - SparkFun Pi Servo HATCustomer #1267880urn:uuid:3c3b09c9-676a-f1c6-4247-9a42f7e512ff2018-02-02T11:34:56-07:00<p>Does anyone know if the Adafruit Python PCA9685 Library will work with this?</p>
SFUptownMaker on DEV-14328 - SparkFun Pi Servo HATSFUptownMakerurn:uuid:256c67dc-7bb3-8c45-1cd4-da0a83ca9b102018-02-01T13:54:57-07:00<p>If I were using a servo larger than the ones that came with the kit, or more than the two that came with the kit, I'd look at an additional power supply.</p>
Mark G. on DEV-14328 - SparkFun Pi Servo HATMark G.urn:uuid:24433e1c-45eb-e2d5-1169-355f5d7b32632018-02-01T12:05:24-07:00<blockquote>
<p>To supply power only to the servo power rail (and not the Pi’s 5V power rail), you just need to remove a small blob of solder on the isolation jumper. Doing this allows you to drive heavier loads coming from multiple or larger servos.</p>
<p>How much load requires a separate power supply?</p></blockquote>
Jorge P. on DEV-14328 - SparkFun Pi Servo HATJorge P.urn:uuid:e984296b-3e91-4b8f-4cc9-c14b6434859e2018-01-20T01:01:52-07:00<p>I am interested in the same. After looking at the schematic, and board, I think the address pins are all left floating. I purchased a couple with the same intent and plan on soldering a wire wrap wire to the address pins so I can test this out. I wish the design would include a spot for a SMD DIP Switch or Jumper Block on the back, where there looks to be plenty of room, to assign the address more easily!</p>
Ocean Mj on DEV-14328 - SparkFun Pi Servo HATOcean Mjurn:uuid:e6819ace-06a5-2ed4-aa55-0088bf481bdb2017-09-18T17:44:31-06:00<p>Can we change the address and use more than one to drive more servos?</p>
One Chris Two Chris Red Chris Blue Chris on DEV-14328 - SparkFun Pi Servo HATOne Chris Two Chris Red Chris Blue Chrisurn:uuid:c6501c85-5659-e052-5af4-6e63f66333c92017-09-15T08:46:24-06:00<p>Good thought. We are currently updating all aspects of our product pages and we'll soon have a fix for this. Until then I'll add a note. Thanks for the heads up!</p>
PickledDog on DEV-14328 - SparkFun Pi Servo HATPickledDogurn:uuid:9015346a-9fc9-f926-ec54-17a1c53f6b762017-09-14T19:06:49-06:00<p>While the hookup guide mentions that you need to add a 2x20 female header before you can pop this on your Pi, the description does not. Considering every other HAT on the site either includes one or has it pre-installed, this requirement should probably be mentioned to prevent unpleasant unboxing surprises :)</p>