My BB-8 droid has two motors configured as what in the BB-8 builders world is called a hamster drive, though is more widely known as a tank drive or differential drive (see the illustrations). I extracted it from the truck and was using it to control my BB-8 droid. I wasn’t using the RC receiver with the toy truck. None of the output wires are common inside the RC receiver, something I discovered the hard way as you’ll see below. To make a DC motor rotate in one direction you connect the two wires one way, and to make it rotate in the other direction you reverse the two wires, or you reverse the polarity. That means the motors are told to rotate either clockwise or counterclockwise as needed. When it was in the truck, it controlled two DC motors: one for driving backwards and forwards, and the other for steering left and right. I have an RC receiver that I’ve taken from a toy truck. The Problem RC toy truck and circuit with no common What I have works, but it still nibbles at my brain and I’d love to see the Hackaday community’s skill and experience applied to this simple yet perplexing design challenge. What follows is my journey to come up with this board. In the end I came up with something that works, but I’m sure there’s a more elegant solution, and perhaps an obvious one to those more skilled in this low voltage realm. Today’s question is, how do you convert a negative voltage into a positive one? When working on my first real robot, a BB-8 droid, I stumbled when designing a board to convert varying polarities from an RC receiver board into positive voltages only for an Arduino. I have a good background working with high voltage, which for me means over 10,000 volts, but I have many gaps when it comes to the lower voltage realm in which RC control boards and H-bridges live. Here is one that takes that sentiment a bit further by snuffing out a candle. Many see useless machines as tangible examples of existential quandary. Sell the switch as one that turns on a candy dispenser, and then actually dispense it after three or five tries. If we weren’t living in such touchy times, we might suggest building one of these into your Halloween candy distribution scheme somehow. It shouldn’t be too hard to make one of these yourself, given that has provided the schematic and STLs. What’s really happening is that an Arduino is getting a signal from the toggle switch, and is then rotating it on a ball bearing with a stepper motor driven through an H-bridge. When this machine is switched to the on position, unseen forces inside the box will spin the toggle switch around 180° to the off position. Honestly, that’s probably part of what drives people to turn them on over and over again.īut has managed to turn the useless machine on its head. When they do, the machine somehow, some way, turns itself off usually with a finger or finger-like object that comes out from the box in what feels like an annoyed fashion. Traditionally, the useless machine is a simple one that invites passersby to switch it on.
0 kommentar(er)
