Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [pololu]

17 questions
5
votes
6 answers

Servo jitters at specific positions, why?

I have a Pololu Micro Maestro, and it's great. But when i tell the servos to move to specific positions, sometimes it makes a beeping-like noise. This only happens at specific positions. It's not because I'm trying to make it go farther than it can,…
Moulde
  • 151
  • 4
4
votes
2 answers

Maximum speed of stepper motor

I would like to compute maximum speed (RPM) of my bipolar stepper motor 42BYGHM809 -- rated voltage 2.7 V, rated current 1.78 A, phase resistance 1.6Ohm, phase inductance 2.5 mH. I know how to compute speed if I use maximum rated voltage for this…
vasco
  • 957
  • 2
  • 15
  • 25
4
votes
1 answer

QTR 8RC White line detection

I am using a qtr8-rc sensor array on a line following robot, When I use it on a black line on a white surface it works but when i try to use it on a black surface with white line i can't get correct results, i have extracted the following code from…
Hamza Yerlikaya
  • 359
  • 2
  • 3
  • 10
3
votes
5 answers

Why does my microcontroller's 5V out fail to activate my 5V relay?

I am using a small microcontroller with 5V output lines to try to turn a relay on and off. I bought the relay module from Amazon and unfortunately I don't know much about what is on the relay module's board, but I do know the relay is a…
tmsimont
  • 135
  • 6
2
votes
0 answers

Looking for help improving power control circuit

I am looking for ideas on improving the circuit below. Any constructive criticism is very much appreciated as well. The following is a long explanation how I arrived at this monstrosity, it can be skipped right away. The setup: We have a mixed bunch…
Maple
  • 11,755
  • 2
  • 20
  • 56
1
vote
2 answers

Roboclaw 2 x 60A - Logic Battery Low

I have a problem each time when I start my Roboclaw 2 x 60A motor controller. When I power it I always see a blinking red light and attaching the USB I see, in the Basicmicro Motion Studio, that I have an alarm which says Logic Battery Low. I can…
bjornsing
  • 165
  • 1
  • 12
1
vote
1 answer

Unable to read values from Pololu QTR 8RC

I am using the Pololu QTR 8RC sensor array. I am using only 5 sensors. I have connected the sensors to arduino on digital pins 3 till 7 + VCC and GND. I am using the example sketch. If I use the function "read" I get some variation in values from…
Hemanshu Bhojak
  • 111
  • 1
  • 3
1
vote
1 answer

Pololu step-up converter drops voltage

I have a Pololu 3.3V step-up converter - U1V11F3. I tested it by connecting a regular 1.5V alkaline battery for input and a resistor at output. With no load or small load (10K) it keeps the output voltage at 3.3, however with higher loads (100 ohm)…
rslite
  • 193
  • 2
  • 8
1
vote
1 answer

Pololu Pushbutton Power Switch

I am replacing my auxiliary light switch of my car. on the switch assembly, it has a positive, negative, and ground. I am replacing it with a pololu pushbutton power switch with an oem switch that is a momentary type. Here is the switch:…
ken
  • 15
  • 6
0
votes
0 answers

Bits getting scrambled over software serial between ESP8266 and Pololu A-star

Setup: ESP8266: board description (sorry it's in Japanese) Pololu A-Star 32U4 Micro: board description Communication over software serial, library EspSoftwareSerial, baud rate 9600 Sender: pololu, Receiver: ESP Problem description The bits sent…
MorganStark47
  • 101
0
votes
1 answer

Programming a Baby Orangutan using Arduino Uno?

I have the following setup: Arduino UNO without the chip: Notice that the Atmel chip is missing. And i have a Baby Orangutan: The orangutan burned with Arduino Uno R3 Bootloader. I connected Orangutans PD0 (RX) and PD1 (TX) to the Uno's D0 (RX)…
Danpe
  • 163
  • 9
0
votes
2 answers

Serial Error Pololu Micro Maestro

I have build a solution that looks almost like this: The wires that does the communication between the Micro Maestro and the two Jrk's and the RoboClaw are not included, so this is not a perfect drawing but maybe you get an impression on how this…
bjornsing
  • 165
  • 1
  • 12
0
votes
0 answers

What are the parts used in the pololu QTRX - RC sensors

I am making a line tracking device project, the number one important part of the device is the IR sensor itself. Now part of the project parameters is that it must be a single board and be only using smd components. With my previous i had a really…
Jake quin
  • 1,884
  • 1
  • 20
  • 40
0
votes
3 answers

Experience with Pololu Robots

Has anyone had much experience with the Pololu Robots Which are the coolest? what do you recommend i get? I'd like to hear about some cool projects with these Robots :)
mad_z
  • 5,050
  • 5
  • 45
  • 56
0
votes
1 answer

Pololu A4988 Decoupling Capacitors

My son (9yrs) has become interested in robotics. I did a course on it in college, but that was a LOOONG time ago and the course was much more rooted in programming than it was in electrical engineering. So, I'm learning as I go so that I can keep…
Networking Guy
  • 3
  • 1
1
2