1. dsds

    Make Touch Pen on a 2-Axis Lego Robot invisible to Capacitive Phone Touch Screen

    I am seeking ideas, or thoughts, on how to make a cable connected touch pen invisible to the capacitive touch screen of a modern smartphone without mechanically lifting the pen (see illustration). This is for a two axis (no lifting!) planer lego robot I am building to teach machine learning, in...
  2. Paul_Alexa

    Inverted Pendulum robot not working properly

    Hello everybody, Thank you for taking the time to read this. I am building an inverted pendulum robot and I am unsatisfied with the performance I'm getting. My purpose was to build something with a PID regulator that can be tuned "on the fly" to study the effects of various changes, seeing how...
  3. K

    How do mobile robot charging contact bars work? How are they safe?

    Hi all, Question for any of you who may know: How does mobile robot charging work safely? I notice a lot of delivery robots are designed with these large contacts (boxed in red below), but how are these designed to prevent them from being live contacts in case of customers accidentally...
  4. C

    Protective elements for powering dc motors

    Hi everyone! I am building a robot that carries a drill to make holes in the ground. I have not been able to find similar size/power references regarding how to power the motors. I would like to know how to protect the battery and motor drivers, my specific questions are: - Where to place...
  5. Anna Swinemar

    Fixing a Robotic Chimpanzee

    Hello! I'm working on a Wow Wee 9001 Alive Chimp. Trying to bring it back to life as a sentimental piece for someone. The monkey consists of sensors on the head, ears , motors, and IR sensors for eyes. It will react to movement and touch. It also has a large remote controller to control...
  6. Y

    Powering 10 servos from a single Li-Po

    I could use some perspective on a circuit I'm planning to build. It's a robot with 6 standard servomechanisms and 4 microservos. I'm set on using a single power source and three step-down converters to feed most of the servos + Arduino Uno + PWM driver with 5V but also supply 6V to two servos to...
  7. Lambo Av

    L293N enquiries for Robots with PIC microcontroller

    Hi, all. I have downloaded an L293N motor driver for my Proteus 8 Professional from the following website. https://www.theengineeringprojects.com/2017/09/l298-motor-driver-library-proteus.html Based on the video link in the website (or you can click here: ), it says that the 2 pins (unknown to...
  8. Lambo Av

    Obstacle Avoiding Robot using PIC Microcontroller

    Hi all, I am currently working on this robot with the guidance of the following website "https://circuitdigest.com/microcontroller-projects/obstacle-avoiding-robot-using-pic16f877a" The circuit diagram is as shown below The L293D motor driver module he used looks something like this while...
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