Hy, I have seen an idea on this site, a push button which can be useful to power-up the entire amplifier, but because it cannot be connected directly to mains, he needs a relay to be "isolated"
Anyone knows a circuit that could do this, maybe a 555? i intend to use the exact push button from that site, it looks good.
How can i add a red LED to be lit when amp is off and blue when is on
Any idea, pls share it and if u know another resource on the net let me know, i'm sure many wants a circuit like this
Adrian,
Anyone knows a circuit that could do this, maybe a 555? i intend to use the exact push button from that site, it looks good.
How can i add a red LED to be lit when amp is off and blue when is on
Any idea, pls share it and if u know another resource on the net let me know, i'm sure many wants a circuit like this
Adrian,
Sounds like you want something like this:
http://users.otenet.gr/~athsam/touch_switch_control.htm
You would need to change R1 and the touch pad for the switch but that's not too hard to do. You'd want a capacitor over the switch to prevent switch bounce from rapidly toggling the circuit.
http://users.otenet.gr/~athsam/touch_switch_control.htm
You would need to change R1 and the touch pad for the switch but that's not too hard to do. You'd want a capacitor over the switch to prevent switch bounce from rapidly toggling the circuit.
One thing to remember is that you need some power to the switch circuit even when the main amp power is off - generally that means a separate 'always on' small power supply. Or a rechargable battery.
Jan Didden
Jan Didden
Hi,
the push to make switch operates a latched relay.
The latch consists of a capacitor, 4 resistors, a FET or BJT, and a relay.
Damned if I can find the circuit to post here.
But I'll keep looking.
A LED+R across the relay will come on when the relay is pulled in.
A LED+R across transistor will stay on when the relay switcher is off.
That separate supply that Janneman mentioned can also supply the other relays that control soft start, delay on, instant off, DC detect, DC servo, etc.
the push to make switch operates a latched relay.
The latch consists of a capacitor, 4 resistors, a FET or BJT, and a relay.
Damned if I can find the circuit to post here.
But I'll keep looking.
A LED+R across the relay will come on when the relay is pulled in.
A LED+R across transistor will stay on when the relay switcher is off.
That separate supply that Janneman mentioned can also supply the other relays that control soft start, delay on, instant off, DC detect, DC servo, etc.
I want to use for this project this circuit with a 555 timer, but i never worked with relays before
This circuit have LED indicators for on/off state
I studied relays a bit and for this circuit i need a relay to switch AC mains to my amp, a double pole relay for neutral and live wires
It is ok if i use 12 V coil and 10A AC rated contacts?
because my amp draw from mains no more then 6 amp
This circuit have LED indicators for on/off state
I studied relays a bit and for this circuit i need a relay to switch AC mains to my amp, a double pole relay for neutral and live wires
It is ok if i use 12 V coil and 10A AC rated contacts?
because my amp draw from mains no more then 6 amp
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