I have a project which required 3.3v (170mA), 5v (1.2A), 12V (not sure yet). For the 3.3v I am going to use an AMS1117-3.3 which is more then enough so this is not an issue.
I have 2 questions mainly as follows:
I want to use 8x of these stepper motors driven by 8x DRV8825 and I am not sure if...
Hello all,
Ok so I have a project, I am not in a hurry to learn and the main purpose here is to learn. But I need to learn the right way. Basically my question is this...
What is the difference from an Atmel 8 bit uC to an Atmel 32 bit uC from the Programmers Perspective?
As in, what is the...
Thanks Hero for your reply.
I will read about these level logic mosfets later on but I have a feeling they switch on / off rather than turn on slowly etc...
Regarding the 12W resistor, you are right. 1W should be enough because I'm only going to pulse 1A for 100 - 200mS
Thanks :)
That's what I thought.. so is there any other way to protect your circuitry apart from using opto couplers and 2 different supplies? I must use only 1 car battery.
Thanks for your reply too :)
X
Hi there,
Ok I did this with the right parts in about 10 minutes. Very simple.
You need to buy an Arduino. http://www.arduino.cc/
And either a Wifi Shield or an Xbee Shield. Let me explain in simple terms. The Arduino was designed to have small boards plugged into it. These boards can actually...
Hi Guys,
I have a couple of questions but I know you might be busy, I would appreciate ANY answer even for 1 question. :-*
I have a situation where I would like to switch an electric match. The typical trigger power for such a device is 12v 800mA - 1A. I have three questions for this.
1. I...
Hi Guys,
As I understand opto couplers, their main use is to isolate a circuit from another,mainly for protection purposes. In my case I have an Arduino which controls a couple of shift registers (74HC595) which trigger transistors and I would like to protect the Arduino and the Shift Registers...
Dear Friends,
I am building a device which requires 12VDC however it can either be powered by a car battery which is already 12V OR by 12VAC (or maybe 16VAC)
At first I thought it was simple because I can simply put a bridge rectifier and a 7812 and AC or DC won't effect my electronics. But...
Hello all,
I have a project at the moment and everything is to work from a single 12V battery. Now I am using an Arduino which has its own 5V regulator. Since I intend to switch some ICs and a relay, I can't just power everything from this poor 5v regulator. Can I for example have a...
Well why not use Arduino man? Its open source, you can build and modify it as you like without breaking any laws and you can find a MILLION projects using Arduino. It very easy to control too. I'd say that you can actually get up and running with the code in less than 4 hours.
good luck
Hi Hero999,
Thanks for your constant cooperation. There has been some development since the last post. So I intend to use an Arduino to connect it to a 74HC595 Shift Register. I will then use a PC817 Opto Coupler as this is fairly new, small and fast. I haven't thought about the output of the...
Hey Hero,
Thanks for your reply. Ok so basically I chose the wrong symbol when making the diagram. The current design is now slightly different.
I basically have the uC -> Shift Register -> Opto Coupler -> Transistor
The loads are all 12V 50mA so no need for large switching stuff...