Hi agdr,
I'm totally fine with your initiative. If there will be leftover PCBs that you would wish to sell on 'bay I don't see a problem here either. So go ahead.
I've corrected some small "imperfections" on the adapter PCBs. I'll post updated gerbers today if I have time or tomorrow.
Regards,
Oleg
I'm totally fine with your initiative. If there will be leftover PCBs that you would wish to sell on 'bay I don't see a problem here either. So go ahead.
I've corrected some small "imperfections" on the adapter PCBs. I'll post updated gerbers today if I have time or tomorrow.
Regards,
Oleg
Oh boy, there I am, busy with work/masters thesis and stuff, and things develop here in the mean time 
(in the awesome way of/c!). Great to see people with better background are taking the initiative
@agdr: That's impressively cheap, considering how much effort it saves compared to manual soldering!
Since TI sent me some samples, I can test around a bit (hand soldering@home, pizza-oven@office-lab & hotair@dads lab).
So count me in for some bare PCBs ;-)
If necessary, I could also offer to redistribute PCBs in the EU.
btw, I did some calculations, too. Lead-free PCBs + stencil form pcbway are 83€ (incl. taxes & delivery to Germany). 25 OPA1622 from mouser are 127€. Add 20€ for 500 caps and 25€ for solderpaste [I have neither], and a small batch soldered in the pizza-"reflow"-oven comes at 255€ or 10.2€ a piece (that's 285US$ or 11.4US$) plus delivery.
A second batch would reduce the costs to those of the OPA1622.
(in the awesome way of/c!). Great to see people with better background are taking the initiative @agdr: That's impressively cheap, considering how much effort it saves compared to manual soldering!
Since TI sent me some samples, I can test around a bit (hand soldering@home, pizza-oven@office-lab & hotair@dads lab).
So count me in for some bare PCBs ;-)
If necessary, I could also offer to redistribute PCBs in the EU.
btw, I did some calculations, too. Lead-free PCBs + stencil form pcbway are 83€ (incl. taxes & delivery to Germany). 25 OPA1622 from mouser are 127€. Add 20€ for 500 caps and 25€ for solderpaste [I have neither], and a small batch soldered in the pizza-"reflow"-oven comes at 255€ or 10.2€ a piece (that's 285US$ or 11.4US$) plus delivery.
A second batch would reduce the costs to those of the OPA1622.
OK, so who's going to be the first to step up to the plate and get some of these produced?
Hmm...looks as though no one is.
It looks like I should take an action and make at least a small test run of 10 adapters and may be assemble a couple of them by hands to confirm that the adapters work. Maybe agdr or someone else is silently doing it but we don't know it so far. In a week or so I plan to submit another batch of other PCB designs for manufacturing and can add 10 adapters to my order. I think it makes sense to produce only simplified version of the adapter without EN and GND pins. What do you think?
As I mentioned earlier I do not plan to run a GB of assembled adapters but I can easily supply some amount of bare adapters if there is interest. If agdr is already doing it then I'm out. I do not want to interfere with his initiative. I hope he reads it and can comment.
As I mentioned earlier I do not plan to run a GB of assembled adapters but I can easily supply some amount of bare adapters if there is interest. If agdr is already doing it then I'm out. I do not want to interfere with his initiative. I hope he reads it and can comment.
Sounds good OlegSh.
Personally, I don't foresee the bare adapters being too popular because for most people(including myself) soldering the components to them is the real problem.
I could be wrong. It certainly wouldn't be the first time.
As you stated, perhaps agdr can chime in on what his plans are for these adapters.
Personally, I don't foresee the bare adapters being too popular because for most people(including myself) soldering the components to them is the real problem.
I could be wrong. It certainly wouldn't be the first time.
As you stated, perhaps agdr can chime in on what his plans are for these adapters.
Sooner or later there will be boards If adgr and/or OlegSh don't run a batch, I will.
I just don't need them right away, so I am thinking about other PCBs I could find useful & order in a single parcel. But I think if I don't have other layouts ready by the end of the month, I'll be ordering just a batch of adapters (probably my own layout).
If adgr and/or OlegSh don't run a batch, I will.I just don't need them right away, so I am thinking about other PCBs I could find useful & order in a single parcel. But I think if I don't have other layouts ready by the end of the month, I'll be ordering just a batch of adapters (probably my own layout).
Hey! Nope, I'm not working on one, too busy lately.
I'm just now circling back to the thread here. I should have thought more before posting, I really don't have time right now to layout and get them assembled, unfortunately. But I would definitely be in for 2 or 3 assembled boards if anyone makes them!I don't have any specific uses in mind, just to mess with. The high input bias current may limit the adapter's usefulness in existing circuits.
Since agdr is not going to produce the adapters for now, I'll probably make a dozen of adapters and try one if it works as intended. If it proves OK I can manually assemble the rest for interested diyers. This will probably be a single run of ~10 adapters since there is no real interest in them. So far only a couple of people expressed their interest so I assume that even 10 adapters is more than needed
I plan to place an order at mouser around this weekend. It will be delivered around Wednesday next week and somewhere around next weekend I should have a couple of adapters done for testing. The price will depend on how many ICs I'll fry during assembly. Assuming one adapter costs me around 1Euro, OPA1622 is around 7Euro at mouser plus small ceramic cap and pin headers, so rough estimate is around 10~12 Euro per assembled adapter (pin headers are not soldered but included) plus paypal fee (~1 Euro) and delivery (4 Euro registered mail, 2 Euro regular mail). If someone wants to assemble adapters by himself just drop me a PM. I have around 50 bare adapters which I don't need I plan to assemble just few of them for ammel68 and may be a couple of other diyers who have difficulty to solder VSON packages. I have no own interest in these adapters.
. Assuming one adapter costs me around 1Euro, OPA1622 is around 7Euro at mouser plus small ceramic cap and pin headers, so rough estimate is around 10~12 Euro per assembled adapter (pin headers are not soldered but included) plus paypal fee (~1 Euro) and delivery (4 Euro registered mail, 2 Euro regular mail). If someone wants to assemble adapters by himself just drop me a PM. I have around 50 bare adapters which I don't need I plan to assemble just few of them for ammel68 and may be a couple of other diyers who have difficulty to solder VSON packages. I have no own interest in these adapters.
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