# Search results

1. ### Battery, voltage, current and loads

Thank you all for your answers so far. It has really helped me!
2. ### Getting started with Robotics and microcontrollers

I want to work on building a quadrotor or rover using Arduino/AVR. What is the best way to get started? Should I buy a kit with instructions? This is my first time venturing into robotics using microcontrollers. I am not sure if buying a kit is more useful (or maybe a specific kit produced by...
3. ### Battery, voltage, current and loads

Something I have been meaning to ask when working on my car: Why is it that we have a 12 volt battery? Why not say 1.5 or 3 volts? Because if current is all that matters, then we could achieve higher current values to power one load (or multiple loads) with lower resistor values, no? Is it that...
4. ### High side driver/Low side driver

I have to work with control units at my new job and I am not sure what something being driver high side versus low side mean? let's says we have a motor connected to a microcontroller unit. if one end +ve of the motor is connected to the controller and the other end of the motor is connected to...
5. ### PWM and Pull up/pull down

thank you baluncore, uart and Jim Hardy. Mr. Hardy, the pics really helped! I cant say I completely understand but definitely get some of it. Maybe I should consider taking a more indepth electronics course.
6. ### PWM and Pull up/pull down

Hi Baluncore, Thanks for the response. The second and third point you made makes sense and seems to apply to the project im working on.. basically I created a level translator circuit boosting 0-5V pwm to 0-12v pwm. While looking at the oscope the senior engineer kept saying we needed to add a...
7. ### PWM and Pull up/pull down

Hi all, I am an electrical engineer and feel I should know this (embarrassing!), but I for the life of me still cant quite get this concept. I understand conceptually the idea behind a pull up or a pull down, in that we want the IC to read a high state, by defaultm in the case of a pull up and...