[endia]

I thought copper was too soft for legs, so I didn't try using copper.
Let us know if they bend or lose the alignment with use? Don't they oxidize with time?

I'm using these pins for legs, I saw @Ivan TT recommending them and bought some:
https://www.aliexpress.com/item/10p...-dual-row-Male-straight-gold/32721243961.html

They work very well and I also recommend them.
To be perfect they should be round (needle type) pins, but their face is square type, not a problem because the pins are very small, so the square is almost a round surface. I couldn't find round pins with this diameter and length.

me too using same pins and indeed they are great for the purpose..

 

[Merlin-PT]

The legs of every opamp bend if you do not pay attention.

Yes, so that copper diameter and being short make it work in normal use, that's nice to know.

I use an extraction tool to remove ICs, it allows to pull the IC verticaly and the legs don't bend this way.
It's very useful, sometimes our fingers can't even reach the socket because of other componentes.
Probably many already use this, but maybe it can be useful to someone:
https://www.aliexpress.com/item/AET...traction-Removal-Puller-Pull/32923020447.html
https://www.aliexpress.com/item/IC-...-Up-Machine-Clip-Repair-Tool/32888469550.html

 

[DBaldock9]

I thought copper was too soft for legs, so I didn't try using copper.
Let us know if they bend or lose the alignment with use? Don't they oxidize with time?

I'm using these pins for legs, I saw @Ivan TT recommending them and bought some:
https://www.aliexpress.com/item/10p...-dual-row-Male-straight-gold/32721243961.html

They work very well and I also recommend them.
To be perfect they should be round (needle type) pins, but their face is square type, not a problem because the pins are very small, so the square is almost a round surface. I couldn't find round pins with this diameter and length.

Found a few similar items, which do have round pins.
From eBay - These appear to have nearly symmetrical pin lengths - https://www.ebay.com/itm/10Pcs-1-40...-Straight-Round-Pin-Header-Strip/153272867478
From Harwin - Don't know what their minimum order requirements are - https://www.harwin.com/filter/?level=3&code=SMM&tlcode=S
From AnyConn - They've got several different types - http://www.anyconn.com/product/Male-Round-Pin-Header.htm
.
Once thing I'd like to find, is a lower profile version of this style of SMT connector pin assembly, to lower the mounting height of my Sparkos SS3602 (Dual Discrete Op-amp) -
.

 

[Merlin-PT]

I tried those round pins in the 2 first links, bough the shorter and taller ones, after they are cut, there is not enough length to reach the PCB.
The taller ones length gets fully inserted inside the dip8 socket, I tried to half insert them so they could also reach the PCB and then they made a poor contact in the dip8 because were not fully inserted. Their size could work, but here they made poor connection when they were half inserted.

the 3rd link you found looks like it has some tall round pins here:
http://www.anyconn.com/ic-socket/male-ic-socket/ic-sockets-1-27-pitch-h1-9-double-row-male-l.html
http://www.anyconn.com/ic-socket/male-ic-socket/four-row-2-0mm-male-ic-socket-connector-made.html

The square one I'm using is from a 1.27 pitch socket, the pins are ~7.20mm tall and need to be cut because they pass to the PCB top.

The dip8 socket is ~3.8mm deep and the PCB ~1.6mm, so around 5.4mm or taller pins looks good.
The dip8 opamp IC pins are ~3.8mm and make a good connection with the socket.
A big pin diameter will make the socket loose after many insertions.

I guess we always need to try what works best in DIY
Round pins would be just perfect, but the small diameter square ones also work well, IC pins are also not round.

 

[Themilkman46290]

Was thinking about doing this, but the wife feels it's too big, thinking of other options, anyone got suggestions? Maybe a Samsung S3 extended battery........

I will have the opamp inside, just relocated to try out some larger size opamps

 

[Merlin-PT]

I'm not familiar with the rechargeable batts, but I don't think we can just connect many rechargeable batt in parallel and expect them to charge well, that would report the voltage and charge indications of all batt and not of each one, the charge circuit would not know what current to use and can't stop for each batt. But I don't know about this, It's just something that should be looked into.

What about using only one batt, exactly like one used, but with the double the thickness and double the capacity (with 6000mAH)?
Or using a external power pack ?

I've read there are "reship services", I never used any and don't know the costs, but some advertise they reship anywhere in the world.

 

[Themilkman46290]

I understand what your saying, I plan on using an external charger for it, in the end my goal is to have batteries and simply swap them out, like the walkmans and discmans of my younger days, I miss the days... Before everything was made to fall apart within 2 years. I had my first cassette player for years, it still worked when I got my first discman 5 years later and when the batteries died, you swapped them out! Now your stuck next to a wall, with a device that cost several times more and is made to start malfunctioning as soon as the warranty expires.........but I'm ranting

Just want to be able to go hiking, or fishing and enjoy music all day and if the batteries die, I simply change them and keep going

 

[Merlin-PT]

Isn't there any closed housing already made only for those batts that would allow you to replace them.
Then you could just pass 2 wires inside zishan or put a connector only for that and attach it to the back.
Like a custom made external power pack with those batts, wouldn't that work?

Edit: I forgot about the opamp
Maybe if you remove the internal batt, it will have space inside.

 

[kookaudio]

I'm not familiar with the rechargeable batts, but I don't think we can just connect many rechargeable batt in parallel and expect them to charge well, that would report the voltage and charge indications of all batt and not of each one, the charge circuit would not know what current to use and can't stop for each batt. But I don't know about this, It's just something that should be looked into.

What about using only one batt, exactly like one used, but with the double the thickness and double the capacity (with 6000mAH)?
Or using a external power pack.

The problem with two batteries is there.
Swapping batteries or external power bank with only one battery are probablynthe only options available. Or a bigger battery with, obviously, a bigger case (I would make a bigger case modifying a standard one if I find a battery with same dimensions except one).

 

[Merlin-PT]

I think there's one batt model in aliexpress with same size, but double the thickness and double the capacity.

 

[kookaudio]

I think there's one batt model in aliexpress with same size, but double the thickness and double the capacity.

Same dimensions except the thickness??
Really?

 

[Merlin-PT]

You'll have to check if it's any good, I just random searched it and I'm not going to use any batt:
(I'm always afraid of cheap Chinese batteries and their protection circuits)
https://www.aliexpress.com/item/3-7...ery-for-power-bank-tablet-pc/32793169791.html

 

[DBaldock9]

I believe this is a larger Li-Ion battery...
.

 

[buzzbuzz]

Was thinking about doing this, but the wife feels it's too big, thinking of other options, anyone got suggestions? Maybe a Samsung S3 extended battery........

I will have the opamp inside, just relocated to try out some larger size opamps

Would it be a cleaner and easier mod if you just move the battery outside of the case? The battery space gained allow larger op-amp and cap swap. Then design a rubber/metal cover to go over the (extra thickt) battery and bottom half of the original case. You can/may even use the original charging port for charging.

I have 2 LG V20 phones for my kids. I purchased extra large batteries for them. The battery package replaces the original back cover with a rubber cover that go over the extra large battery and fit over the bottom edges of the phone.

 

[kookaudio]

You'll have to check if it's any good, I just random searched it and I'm not going to use any batt:
(I'm always afraid of cheap Chinese batteries and their protection circuits)
https://www.aliexpress.com/item/3-7...ery-for-power-bank-tablet-pc/32793169791.html

Great thanks!
(BTW, I don’t think the protection circuit of the original battery is much more trustable...)
Making the case is fairly easy: cut in the sides of the original case ans make 4 plexiglass sides, duplicating the up and bottom ones 6 or 7mm bigger, and screwing the pkexiglass panels at the sides. Really affordable mod.