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....
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