there are two bugs that I can see now, lets see who spots them first. However they do not affect the function of the board, in that sense they are just aesthetic.
is it the screen for the pinning on the top middle and right to220 devices? says 132 rather than 123: positions U2 and U4
Ok here is the problem, I forgot to pull back the ground plane on two of the fudcials, causing the ground plane to be exposed.
SMD Group Buy ?
I see lots of SMD on the reg PCB.
Do we have SMD on the amp PCB?
Do we have a list of these SMD components?
Should we organise a Group Buy of the SMD?
I am about to place an order with Rapid online, which I could hold back for a week or two if I am going to add in UK & European requests for SMD components.
I see lots of SMD on the reg PCB.
Do we have SMD on the amp PCB?
Do we have a list of these SMD components?
Should we organise a Group Buy of the SMD?
I am about to place an order with Rapid online, which I could hold back for a week or two if I am going to add in UK & European requests for SMD components.
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This is not the regulator PCB, it is the Protection/Control PCB, yes there is a large amount of SMD components on this board, and yes there will probably be a group buy. There will be a bill of materials published in good time (It is already written).
As a guide, if you are willing to purchase some components from farnel and some components from digikey. a protection board will cost about $50 if the GB contains 10 people plus the PCB. In quantities of 100 that will go down to $35.
This board is configurable in what each of the relays can be triggered by, and this configuration will be detailed in good time.
There are about 150 components on this board. However it is completely discrete components, and the auxiliary PSU is now integrated onto this PCB.
Also EUVL i think you have forgotten one thing on the back panel of the chassis. The button to reset protection board if it trips.
As a guide, if you are willing to purchase some components from farnel and some components from digikey. a protection board will cost about $50 if the GB contains 10 people plus the PCB. In quantities of 100 that will go down to $35.
This board is configurable in what each of the relays can be triggered by, and this configuration will be detailed in good time.
There are about 150 components on this board. However it is completely discrete components, and the auxiliary PSU is now integrated onto this PCB.
Also EUVL i think you have forgotten one thing on the back panel of the chassis. The button to reset protection board if it trips.
Is there a possibility for this to be internal? I’m thinking triggering would be a rare occasion. 😀
Of course there is. I was thinking however of a red momentary micro-switch. mounted so that the whole switch is on the inside and all that is on the outside is a 3mm hole. (this has not been discussed with EUVL yet.
Maybe it's just a case of a power reset? Switching the amp off and back on should clear it... That's probably how I'd design it.
Alexis,
I failed to spot that you did not put in a reset push button. My fault.
It needs wiring to +5V and the trip reset line, the latter is wired to a terminal block.
So easy enough to add, but probably not necessary.
In case of a fault, the mains power to the amp Tx will be disconnected by the mains relay.
You then want to check the amp anyhow after disconnecting the speakers.
This means you probably want to power the amp one channel at a time with a lab PSU.
So resetting the protection board is not necessary.
If you have to, power off and waiting 2 minutes will also do.
Thus I'll rather leave it as is, unless you want to change the layout.
Your call. 😉
Patrick
I failed to spot that you did not put in a reset push button. My fault.
It needs wiring to +5V and the trip reset line, the latter is wired to a terminal block.
So easy enough to add, but probably not necessary.
In case of a fault, the mains power to the amp Tx will be disconnected by the mains relay.
You then want to check the amp anyhow after disconnecting the speakers.
This means you probably want to power the amp one channel at a time with a lab PSU.
So resetting the protection board is not necessary.
If you have to, power off and waiting 2 minutes will also do.
Thus I'll rather leave it as is, unless you want to change the layout.
Your call. 😉
Patrick
I thought it needed wiring between trip reset and ground, my bad, I will correct this in the PWB now, as it is not difficult. will be fixed in the next version, and then it will be on the terminal block. then someone can put a switch on the inside of the chassis. also that behavior is configurable.
Please see the original schematics I sent you right at the beginning.
The reset switch was in there, together with pull-down resistor.
If you are changing, could you change the first layout as well please ?
(The one measuring 90x100mm, if I remember correctly.)
Thanks,
Patrick
The reset switch was in there, together with pull-down resistor.
If you are changing, could you change the first layout as well please ?
(The one measuring 90x100mm, if I remember correctly.)
Thanks,
Patrick
I am probably going to re-do the first layout, reusing the stuff that I have learned. Also if I remember correctly, that one had a switch on board.
edit. The connector has been fixed and a pull down added. thus the problem will be fixed for the GB.
edit. The connector has been fixed and a pull down added. thus the problem will be fixed for the GB.
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