relay driver

[tINY]

Actually, this isn't that common.

To be sure: You need 24 isolated relays with a push-button to activate each on and a single clear button.

To use that many relays - most people use USB (or DMX, or RS485).

Have you considered using another relay for each channel? Set it up as a self-latching relay and use the output to drive the coil on the audo connect relay. For a master clear, you just need an "NC" pushbutton that will interrupt the power to the control relays....



-tINY

[salomonander]

Originally Posted by tINY

Actually, this isn't that common.

To be sure: You need 24 isolated relays with a push-button to activate each on and a single clear button.

To use that many relays - most people use USB (or DMX, or RS485).

Have you considered using another relay for each channel? Set it up as a self-latching relay and use the output to drive the coil on the audo connect relay. For a master clear, you just need an "NC" pushbutton that will interrupt the power to the control relays....



-tINY

hey
thanks for the reply. yes, i want to control 24 channels with 24 dedicated momentary pushbuttons and need a single reset button that will set all relays to their original state. this is for a mixing desk solo function.
when using a self-latching relay i would still need two buttons for on/off right? i need to turn the relays on/off with one pushbutton only per relay.

maybe it helps if i give the link to one of the products i have found:
Universal Switcher Control PCB + microcontroller
it would be perfect - but lacks the reset function. i guess i could just cut power to the board for a "reset". but i assume that this would harm the components in the long run. so im looking for a similar product with a global reset function.

thanks a lot
jakob

[Henke]

A microcontroller with simple high level programming such as the Arduino, using serial data and a couple of shift registers such as CD4021BE for the pushbutton inputs and 74HC595 for the relay drivers is probably the easiest and cheapest way. And you can easily handle debouncing in software.

[jrp]

i have been thinking about getting into programming for a very similar reason.
I have not started yet, but i belive this to be among the easiest things to programm.

Many possbile applications, for me it is about switching between different modes on gear, programming a fixed number of switch positions.
I learned that this is done easily with a diode matrix, so i never went any further.
Still i am sure if you find some sites for programming basics this will be an easy task.

[salomonander]

some people here and on group diy are helping me out with programming a micro controller. just in case anyone else needs a solution i found this:
http://www.pedalsync.com/documentati..._Datasheet.pdf
looks like a fair solution. anyways - im covered. thanks