![]() Probably only need to change the input capacitor at that point. Instead, use the 5v out of the usb charger to the usb connector of the Arduino (You would need to make a usb cable). Takes up to 40v input, adjustable output with a resistor pair, and can do 650~750mA without any other changes.Įven better, USE 5V NOT 9V! Giving the Arduino 9V will make it go through the regulator on board, wasting another 4V * 0.5A = 2W of energy in heat. Most dollar store to 5/10 dollar chargers at a local corner store use a MC34063 regulator IC. Heck, a common car usb charger, with a few resistor changes and maybe a new input capacitor (for greater than 24V), will do what you want. You are wasting (24V - 9V) * 0.5A = 7.5 Watts of energy in heat in those resistors! Horrible.Ī small switching regulator module will work nicely. Wasted energy, fire hazard, and voltage will vary based on load. If there is a strong reason NOT to use just resistors, let me know! (I'm not an EE). I really have a very elementary understanding of circuit design, though I am trying to improve.Ĭan anyone show me an improved design using only resistors to step 24V down to 8-9V, as well as limit the current to 400-500mA? Again, I intend to directly take the output of this circuit and have it powering an Arduino.Īs of now, I only have access to resistors for help. I have no idea if grabbing the voltage and current from the last set of resistors is even the best way to do this. I'm getting 8V out instead of 9V, I'd much prefer 9. Problems with my circuit that I am aware of: But, because a 20 ohm resistor will basically explode when subjected to that level of current, I have had to split each 20 ohm into five 100-ohm resistors. This is basically three 20-ohm resistors in series, and I'm grabbing the voltage across the last "20 ohm" resistor. Simulate this circuit – Schematic created using CircuitLab I have technically already designed the circuit I need, but after looking at it for 1/2 a second, you will realize that it it not what you would call.good: As of now, I only have access to resistors for help. So, I'm trying to design a circuit that will step the 24V down to ideally 9V and around 400-500mA. However, it is quite obvious for anyone who has used an arduino before that 24V is NOT a good input voltage. The goal is to have the other pair going into the arduino. The power supply has two V+ pins and two V- pins, so I plan to just hook one pair directly into the microstepper driver. ![]() I want to power BOTH the microstepper driver and the arduino using the 24V power supply. The problem is that I have the arduino's power coming from a 9v power supply, and the microstepping driver coming from the 24V power supply. I have literally everything working as of right now. My project requires the ability to dynamically turn on and off an arduino (which is the heart of the embedded system I'm working on) using only code. In short, as I said before, they are different products with different audiences, and therefore different design goals.I recently bought this power supply to power a microstepping stepper motor controller (which requires an input voltage of 24V). Yes, you can use the Arduino IDE with a Pico now, but that wasn't that way from the beginning, and the fact that you can do so now is A) not because Raspberry Pi released any official method and B) because the Arduino IDE exists in the first place specifically to support Arduinos. With all the components connected, we can now proceed to examine the code for the project. And the toolchain is _far_ more complex for beginners! Hell, I had some issues setting up the Pico toolchain on my Mac (and I'm not a beginner), whereas with the Arduino, it was just "get the Arduino IDE". The Arduino is powered over its DC power jack, with supply from the 24V terminal on the power supply. ![]() You need a breadboard in order to use it with anything else. In contrast, Pico is far more complicated for beginners, since it's not designed for that purpose. I believe a secondary design goal is to still be useful past the beginner stage (which is where comparison with a Pico comes in), but that's not the _primary_ goal. And why Arduino shields exist, so you can add on the Unos in plug-and-play kind of fashion, for beginners. This is also why the Arduino Uno can be used without breadboard. This is why the Arduino IDE exists (and why many more advanced hobbyists eschew it). Arudino Uno has _always_ been primarily about being super simple for beginners.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |