This thread is for a group buy for a new Salas board L-Adapter.
This regulated supply can do ~1.5 to ~20V higher current rates than previous shunt supplies offered by Salas. The board is 136mm x 63mm, 2oz copper, 2mm thick.
The amount of Digital Devices such as Raspberry Pi, wall-wart devices and DACs using lower voltage and increased current is growing and the desire for non Brick or USB power supplies has come knocking on our door for some time.
L-Adapter Technical and Build Thread:
https://www.diyaudio.com/forums/power-supplies/336685-adapter.html#post5761291
The Board L-Adapter USD$18 each
Built up pictures
LED orientation
The BOM for the board is really strait forward. The Transistors do not change regardless of voltage or current. All parts are available from Mouser for those who have easy access and shipping arrangements with them. Minkits will be offered and can shipped as flats internationally for a lower shipping price than full kits. Full kits are going to be offered as well, but will demand a significantly higher shipping costs as the heatsinks and caps require package shipping internationally. Minikits and full kits ship domestically at a lower rate. The full kit based around the expected needs to power a Raspberry Pi. Some lower current devices may not need the diode heatsinks, some higher current ones will need to mount the diodes and the TO-3P transistor directly to a chassis and or heatsink.
BOM below.
L-ADAPTER BOM DiyA - Google Sheets
Why these parts were chosen Diodes, Fuse, HS
The diodes are rated up to 200V and 30A, so these are higher than the regular MSRF860 that I ship with other kits. These can handle more current, have a low vF and are fast recovery. The Fuse is slow blow version chosen via Salas that will be able to handle transients above it's 8A rating. It's being used in the Power supply as part of a CRC Filter. The heatsinks are chosen for common dissipation needs.
Higher cap values can be used than 6800uf, but may need a In-rush current limiter to avoid problems. Caps should all be 105c rated, as this unit can produce heat when being run hard!
Sign up sheet is in my signature. GB Close date is not yet chosen. Please follow thread for updates and interest.
This regulated supply can do ~1.5 to ~20V higher current rates than previous shunt supplies offered by Salas. The board is 136mm x 63mm, 2oz copper, 2mm thick.
The amount of Digital Devices such as Raspberry Pi, wall-wart devices and DACs using lower voltage and increased current is growing and the desire for non Brick or USB power supplies has come knocking on our door for some time.
L-Adapter Technical and Build Thread:
https://www.diyaudio.com/forums/power-supplies/336685-adapter.html#post5761291
The Board L-Adapter USD$18 each
Built up pictures
LED orientation
The BOM for the board is really strait forward. The Transistors do not change regardless of voltage or current. All parts are available from Mouser for those who have easy access and shipping arrangements with them. Minkits will be offered and can shipped as flats internationally for a lower shipping price than full kits. Full kits are going to be offered as well, but will demand a significantly higher shipping costs as the heatsinks and caps require package shipping internationally. Minikits and full kits ship domestically at a lower rate. The full kit based around the expected needs to power a Raspberry Pi. Some lower current devices may not need the diode heatsinks, some higher current ones will need to mount the diodes and the TO-3P transistor directly to a chassis and or heatsink.
BOM below.
L-ADAPTER BOM DiyA - Google Sheets
Why these parts were chosen Diodes, Fuse, HS
The diodes are rated up to 200V and 30A, so these are higher than the regular MSRF860 that I ship with other kits. These can handle more current, have a low vF and are fast recovery. The Fuse is slow blow version chosen via Salas that will be able to handle transients above it's 8A rating. It's being used in the Power supply as part of a CRC Filter. The heatsinks are chosen for common dissipation needs.
Higher cap values can be used than 6800uf, but may need a In-rush current limiter to avoid problems. Caps should all be 105c rated, as this unit can produce heat when being run hard!
Sign up sheet is in my signature. GB Close date is not yet chosen. Please follow thread for updates and interest.
Last edited:
Shorting plugs for lack of a better name
Tea Bag,
I didn't see in the BOM any shorting plugs for the "Headers & Wire Housings 09+09 DIL VERTICAL PIN HEADER TIN."
Can you point me in the directions of those. As I understand, they are used to adjust the output voltage by energizing the stack of LED.
Rush
Tea Bag,
I didn't see in the BOM any shorting plugs for the "Headers & Wire Housings 09+09 DIL VERTICAL PIN HEADER TIN."
Can you point me in the directions of those. As I understand, they are used to adjust the output voltage by energizing the stack of LED.
Rush
There are plenty on ebay,
Mouser techs could not find one. Find that hard to beleive.
I can put those in minikit. They are not expensive. Of course they are not essential if you just wanted to use a wire there anyways and solder it in.
Something like this.
NEW RED 10x Mini Micro Header 2.54mm 0.1" Circuit Board Shunts Short Jumper USA | eBay
Depends more or less on what you order.
Likely, for international buyers except Canada.
10.00 for board. 2.00 for each additional board.
16.00 for board and one full kit.
24.00 for two full kits.
I have not measured out much beyond that.
GB For Salas Boards ends 6-9-2019 - June 9 2019.
I have sent private message to all people that have currently signed up.
If you have not done so, add your name to the Group buy spreadsheet.
I have sent private message to all people that have currently signed up.
If you have not done so, add your name to the Group buy spreadsheet.
Hi Mike, I just sent the Paypal - many thanks for doing all the GB work - it's greatly appreciated by us all … James
The Group Buy for Salas Boards concludes on 6-9-2019, June 9th 2019 @ 11:59PM.
I have sent private message to all people that have currently signed up.
If you have not done so, add your name to the Group buy spreadsheet, linked in my signature.
I have sent private message to all people that have currently signed up.
If you have not done so, add your name to the Group buy spreadsheet, linked in my signature.
I just added 2 L adapters to the spreadsheet.
I may have accidentally added them also into vanofmonks order too. Please can you check that they are actually required by him. I think I did fill in the field on his line but not 100pc so I left them there.
Sorry ....a bit fiddly on a phone!
I may have accidentally added them also into vanofmonks order too. Please can you check that they are actually required by him. I think I did fill in the field on his line but not 100pc so I left them there.
Sorry ....a bit fiddly on a phone!
Salas can you put me on the list for 2 bare boards?
Would do it by myself but at the moment only online with my smartphone
Would do it by myself but at the moment only online with my smartphone