Given that value is highly subjective, I think you might some folks disagreeing with you on that.
I was comparing it to an equivalent device so not subjective at all on that level. Sure, on the human level value, it depends on what people want and how much; but I wouldn't dare go near that subject. 🙂
This is about markets as well, few people have ever heard of a headphone amplifier, I made a CMOY for my brothers 50th birthday, and he’s been listening to music seriously for 40 of those years and was astounded at the little amp and how much it improved his Walkman sound quality. When I told him I had made it myself and it cost less than £30, (plus I put it in a Jack Daniel’s 1 oz tobacco tin, his favourite drink btw)he was amazed. He asked me what I would charge for making a couple for him to give as gifts to his friends. So I thought about it and said £100 each. Of course that price is what I would expect to make in profit, I’m not making a special gift for my brother I’m making them to be passed on, there’s a big difference.
What you have to bare in mind with these projects is the things you have to do / buy besides just assembling them.
· Finding the parts ( the right parts not the cheapest)
· Dealing with suppliers
· Ordering them.
· Missing the delivery and having to drive to the local post office depot to pick them up.
· Trawling eBay for the correct enclosures.
· Sorting the parts.
· Soldering the parts.
· Assembling the enclosures and amp.
· Testing the amp.
· Advertising them.
· Packaging them.
· Hauling them to the courier.
· Dealing with unsatisfied customers.
· Collecting the money.
· Accountancy
· Marketing
· Creating spread sheets to keep track of all the parts you have and need.
· Space and equipment for the assembly.
· Tools.
I’m sure I could find more, but that’s the point I made to my brother, there’s a huge difference between audiophile enthusiasm for a fantastic little piece of electronics also I might point out you know it’s fantastic you have to convince other people they are and that’s hard with audio as its mostly subjective. Which gets me back to the market, how many people know how good an O2 amp is ? Chances are it’s because they have listened to one, and the chances are that was either made by themselves or by some who could quite easily make one for them. So the market itself is extremely narrow, people who know what the O2 amp is , don’t want to make one themselves and understand its quality because of statistics. That’s a very small market.
What you have to bare in mind with these projects is the things you have to do / buy besides just assembling them.
· Finding the parts ( the right parts not the cheapest)
· Dealing with suppliers
· Ordering them.
· Missing the delivery and having to drive to the local post office depot to pick them up.
· Trawling eBay for the correct enclosures.
· Sorting the parts.
· Soldering the parts.
· Assembling the enclosures and amp.
· Testing the amp.
· Advertising them.
· Packaging them.
· Hauling them to the courier.
· Dealing with unsatisfied customers.
· Collecting the money.
· Accountancy
· Marketing
· Creating spread sheets to keep track of all the parts you have and need.
· Space and equipment for the assembly.
· Tools.
I’m sure I could find more, but that’s the point I made to my brother, there’s a huge difference between audiophile enthusiasm for a fantastic little piece of electronics also I might point out you know it’s fantastic you have to convince other people they are and that’s hard with audio as its mostly subjective. Which gets me back to the market, how many people know how good an O2 amp is ? Chances are it’s because they have listened to one, and the chances are that was either made by themselves or by some who could quite easily make one for them. So the market itself is extremely narrow, people who know what the O2 amp is , don’t want to make one themselves and understand its quality because of statistics. That’s a very small market.
Also add in:
Paypal fees
Parts going on back-order with no suitable equivalents available
Suppliers not sticking to agreed delivery dates
Shipments getting lost in transit
Repairs and servicing
Cost of complying with legislation like CE testing / approval / marking
Currency fluctuations...
Paypal fees
Parts going on back-order with no suitable equivalents available
Suppliers not sticking to agreed delivery dates
Shipments getting lost in transit
Repairs and servicing
Cost of complying with legislation like CE testing / approval / marking
Currency fluctuations...
And if you are registered as a small business there is the income tax on the small amount you have left over... if any
I intend to suppress this one constantly 😀
and..
supplier does not deliver to specs...
but a bargain to be made for others
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Not a problem , like I said it was very fast and well packaged 🙂
BTW has anyone sourced a charger from the uk for this project ?
Nw (God ) Guy's BOM has 14-20 VAC >= 200 mA Wall Transformer 2.1 x 5.5 mm 13.5 VAC min
I'd like a decent one if there are any suggestions ? 😱
Wow your a Star mate 🙂 and the good thing is I live 3 miles from CPC lol 😛 Bad thing is CPC are crap for parts now 🙁
LOL and when you go the part page its says
Customers Also Bought
ALUMINIUM INSTRUMENT HOUSING
BOX ENCLOSURES B2-080BK
Wonder what they are building ?? 🙂
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Yes, I noticed that - rather ironic, considering that I had to wait 3 months for them to deliver 2 of them! I gather from a comment on one of the other forums that they had a problem at the factory in making the last batch of these, which caused the delay.
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Don't know what I was thinking there. Thin margins on pile-em-highs are less than that, though it's all relative to the market and the seller position in it.
I just completed my O2, and I can't believe what I am hearing from it! Just wanted to say thanks for giving this to the community and I will totally be building an ODA when the documents for it are released.
hi,
I suspect mosfet Q2 is out
i found an IRF 630 from a supplier near me,but the VGS is +-20v,where i can measure vgs?
Will it works or burns or only works with battery(2X9)
thanks for help
I suspect mosfet Q2 is out
i found an IRF 630 from a supplier near me,but the VGS is +-20v,where i can measure vgs?
Will it works or burns or only works with battery(2X9)
thanks for help
Farnell uk say they have 140 in stock
B2-080BK - BOX ENCLOSURES - CASE, ALUMINIUM, BLACK, 109X30X80MM | Farnell United Kingdom
B2-080BK - BOX ENCLOSURES - CASE, ALUMINIUM, BLACK, 109X30X80MM | Farnell United Kingdom
Odac sized usb hole
Anyone got any ideas for making an ODAC sized USB hole for the rear faceplate?
I successfully drilled holes for the frontplate. However, a drill is all I have so right now it seems like I'm going to have to drill a large, round hole for the ODAC usb port and then find some way of making a surround (perhaps with a glue gun). Any suggestions on making surrounds would be great also.
Anyone got any ideas for making an ODAC sized USB hole for the rear faceplate?
I successfully drilled holes for the frontplate. However, a drill is all I have so right now it seems like I'm going to have to drill a large, round hole for the ODAC usb port and then find some way of making a surround (perhaps with a glue gun). Any suggestions on making surrounds would be great also.
Maybe drilling the corner holes for the USB socket and then chisel and file out the rest?