Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Search results

  1. H

    What does ""active low" mean ?

    Yes, here is some additional info on my idea. 1. I'll have a standard rs485 full duplex network: One master multiple slaves. This I'll call the "Main network". 2. An extra twisted pair is added to this setup and is only used to send data FROM a slave TO the master and only to initialize the...
  2. H

    What does ""active low" mean ?

    Thanks you for your replies. Well, that was what I "feared" :-) Let's say I have a bus and some nodes on that bus. The nodes are daisy chained. The bus goes into node A and then runs on to node B etc. At each node the bus runs through a "switch" (I was hoping that the switch could be a...
  3. H

    What does ""active low" mean ?

    Hi. I'm new to all this and learning every day. This might be a very basic question and I do think I have understand it the correct way, just need to be sure. I have a quad bus buffer, the 74HC125. In the data sheet it says: This means that if there is no signal going to the !OE pin the...
  4. H

    [SOLVED] Connecting sub-boards to a PIC

    Re: Selecting sub-boards Thanks kuben111. I'll keep this in mind. For now I'll go for a single uP-solution and try to make it work with nothing but switches and demuxes as shown in my attachment. It is worth a shot I think..
  5. H

    [SOLVED] Connecting sub-boards to a PIC

    Re: Selecting sub-boards Yes, I see. That's a nice approach. (I did wonder how I could distribute the addresses if I wanted to have the exact same code in each slave-uP) For this project though (my matrix-mixer) I'll see if I can make it work without additional PICs on the 16 slave boards.
  6. H

    [SOLVED] Connecting sub-boards to a PIC

    Re: Selecting sub-boards Hi kuben11. Thanks for your reply. I'm not sure what you mean by "uP" But with your approach I need a PIC on each sub-board don't I ? To decode the addresses. My setup will be used in a matrix-mixer. Each sub board will consist of a 4-to-16 demux connected to 16 volume...
  7. H

    [SOLVED] Connecting sub-boards to a PIC

    Hi I'm sure there is a "standard" way to solve this problem. I just don't know it. Here is my thoughts. If I have a PCB that should be connected to a PIC (using 4 pins) on another PCB, then I'll just connect the two with a cable. Now let's say I have 16 PCBs I need to connect to the same PIC...
  8. H

    [SOLVED] Uart Daisy chaining, possible ?

    Thanx again, Brian. This was very helpfull. I'll try and experiment with all this as soon as my PICs arrives.
  9. H

    [SOLVED] What component will do this ?

    Perfect, thank you for your help.
  10. H

    [SOLVED] What component will do this ?

    yes I see, a bit more info is needed. It is DC 5volt It is a logic level signal. Yes it is an audio mixer, but this switch goes on the digital side. A few more words: I'll have up to 8 inputs to my mixer. Each input signal is fed to 16 volume controls (PGA2311) I.e.. 16 channels. The 8 signals...
  11. H

    [SOLVED] What component will do this ?

    Hi. I'm new to all this, but I'm trying to design a circuit for a computer controlled mixer. I'm still at the basics but learning every day. I need a "device/component" that's nothing more that a switch, but it should switch on 4 (or 5) circuits at once. The switch should be controlled by a...
  12. H

    [SOLVED] Uart Daisy chaining, possible ?

    Thank you Brian. I would agree that a parallel setup is better. Two questions about a parallel solution. 1. If I want to have the same software on all slaves hence unable to define different slave addresses in code how can I set the addresses ? The only way is to have some extern "thing" that...
  13. H

    [SOLVED] Uart Daisy chaining, possible ?

    Hi Although I've been making PC-software for quite some years now, I'm just at the beginning of my journey into the world of microcontrollers. I'm trying to figure out how I can build a computer controlled audio mixer. (8 inputs 16 individually stereo outs) To build this mixer, I plan to...

Part and Inventory Search

Top