![]() ![]() GPS Navigators – Since most students are not allowed to have cell phones at school, you will need to purchase GPS navigators. Just like Pokémon, it is a treasure hunt but at a higher level because it involves using clues and GPS. Geocaching is a challenging, fun, and engaging activity that millions of people do around the world. This was the perfect opportunity for me to introduce geocaching to my students. I loved that kids who might not otherwise get off their tablets or computers were active and engaging with the world. This was no different than at my school in Las Vegas. Finding and catching new species of Pokémon was like a thrilling treasure hunt. madwilliamflint has added a new log for Ohno Frobnosticator.Kids all over the nation went wild for Pokémon Go when it was released.Jackson wrote a comment on Soldering RT1.kelvinA has updated the log for Tetent.madwilliamflint has updated details to Ohno Frobnosticator.Josh has updated the log for Toddler's Cyberdeck.Kārlis has updated the project titled Keysheet. ![]() michaelguzzi liked mysoltrk - a solar tracker, reinvented.Plasmode has added a new project titled Diagnostic Overlay for W65C02 Breadboard.Hirudinea on Hackaday Links: August 13, 2023.Shamrock on Hackaday Links: August 13, 2023.Thinkerer on Portable 1990s POS Will Strain Your Back.Jan Praegert on Making Things Square In Three Dimensions.CircuitGuy on Liquid Metal Battery Goes Into Production.Bruce on USB-C Cable Tester Is Compact And Affordable.Bob on Making Things Square In Three Dimensions.This Week In Security: It’s Con Season 8 Comments In the latter case it can work – you just don’t know. However, if the servo is implemented with a small microcontroller itself, then it may use a straight up voltage divider and do all the PID stuff in software. What that means is, you won’t necessarily get a nice voltage out of the servo potentiometer, but a sort of sawtooth wave repeating every 20 milliseconds, and the Arduino then has to measure and interpret what it means. While the pulses are both in their “high” state, nothing happens, but if one pulse drops to “low” before the other, that generates a pulse to the motor to turn one way or the other, and the greater the difference between the two the longer the pulse to the motor – this produces a simple proportional control. Another timer is triggered by the rising edge of the incoming servo pulse, and continues for a time set by the servo potentiometer. One timer is charged by the incoming servo pulse and a comparator sees when the pulse falls below a certain value. The simplest way that an analog servo can work is by setting off two RC timers. ![]() If it’s entirely analog, then it’s likely that the potentiometer inside is used as a part of a one-shot delay timer and does not produce a continuous output signal. This depends entirely on the servo and its internal controller. Posted in Arduino Hacks Tagged arduino, Arduino Uno, choreography for servos, potentiometer, servo, simon says Post navigation ![]() If you want to try this with a bunch of servos at once, might as well build yourself a little testing console. What would you do with it? Let us know in the comments. There are a ton of possibilities for this kind of control. If you locate the pot output pin on the control board and run a wire from there into an Arduino, you can use that information to calibrate and control the servo’s position pretty easily. As demonstrates in the video after the break, the servo knows its position thanks to an internal potentiometer on the motor’s rotor. The whole operation is way simpler than you might think. The servo records and then mimics the movements just as they were made. Then he grabs the horn and moves it around however he wants - it can even handle different speeds. First he tells the Arduino the desired duration in frames per second. With just one wire, an Arduino, and some really neat code, can get this servo to do whatever he wants. How much easier would life be if you could just grab hold of whatever mechanism you wanted to manipulate, move it like you want, and then have it imitate your movements exactly? What if you could give a servo MIDI-like commands that tell it to move to a certain location for a specific duration? Wonder no more, because has big-brained the idea into fruition. ![]()
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