Author Topic: What did you buy today? Post your latest purchase!  (Read 1349630 times)

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Offline Kjelt

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Re: What did you buy today? Post your latest purchase!
« Reply #9275 on: October 13, 2019, 09:34:20 pm »
Just picked up this in a local government auction.  C$100
Seems to work, and close enough in cal for my use.
Check if the PSU has an overshoot at powerup/startup, I once fried a circuit with a look a like PSU that when set to 5V at powerup shot over to 6,8V spike then return to 5V, frying my board that was still connected.

 

Offline boffin

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Re: What did you buy today? Post your latest purchase!
« Reply #9276 on: October 13, 2019, 11:13:32 pm »
Just picked up this in a local government auction.  C$100
Seems to work, and close enough in cal for my use.
Check if the PSU has an overshoot at powerup/startup, I once fried a circuit with a look a like PSU that when set to 5V at powerup shot over to 6,8V spike then return to 5V, frying my board that was still connected.

Thanks for the warning, I'll have a look.

Just gave it a try, no overshoot
« Last Edit: October 13, 2019, 11:17:14 pm by boffin »
 

Offline technix

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Re: What did you buy today? Post your latest purchase!
« Reply #9277 on: October 14, 2019, 02:00:45 am »
Ive been wanting one for ages but just never got round to ordering 1! Looking forward to learning how to drive it!  :)
If you want to, you can try turning this into two AVR dev kits in one by flashing Hoodloader2 on the USB MCU ATmega16U2. That keeps Arduino Uno features intact, while allowing you to program both chips.
 
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Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #9278 on: October 15, 2019, 04:44:20 am »
Ordered 15 pcs of PCB and 10 sets of parts for my Gowin FPGA board. Despite I used 0.2mm/0.4mm vias and 0.1mm clearance between vias and traces, JLCPCB still approved the order.



Youtube video is on its way. Could be a 3 video series, hardware design, hardware prototyping and EDA software & blinky demo.
If all goes well, it will end up on a fundraising platform soon after I land in China in 6 weeks, and I hope I can get it debugged and built while I'm still in US -- carrying parts is messy.
 
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Offline technix

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Re: What did you buy today? Post your latest purchase!
« Reply #9279 on: October 15, 2019, 05:54:34 am »
Ordered 15 pcs of PCB and 10 sets of parts for my Gowin FPGA board. Despite I used 0.2mm/0.4mm vias and 0.1mm clearance between vias and traces, JLCPCB still approved the order.

(Attachment Link)

Youtube video is on its way. Could be a 3 video series, hardware design, hardware prototyping and EDA software & blinky demo.
If all goes well, it will end up on a fundraising platform soon after I land in China in 6 weeks, and I hope I can get it debugged and built while I'm still in US -- carrying parts is messy.
What is this? What are the supporting parts?
 

Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #9280 on: October 15, 2019, 06:03:39 am »
What is this? What are the supporting parts?

GW2AR-LV18 FPGA and CH552E MCU and SLG46580 CMIC/PMIC.

The SOT23-5 are MT9700 ideal diode/load switch combo.

The SC70-5 are transistors to handle 5V/3V switch over for CH552 and for entering DFU mode using a button (logic conversion) for CH552.
« Last Edit: October 15, 2019, 06:05:11 am by blueskull »
 

Offline BFX

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Re: What did you buy today? Post your latest purchase!
« Reply #9281 on: October 15, 2019, 08:34:55 am »
I was skeptic but after saw some videos decision was clear BEST BST-863 from china :)
Internal working-out is better like original Quick one.
And even somehow they delivered this guy without any additional payments (c_u_s_t_o_m_s, V_A_T) to europe. Great  :-+
I'm so satisfied with that.  :-+
(Attachment Link)
New BST-863 during testing
(Attachment Link)
Old shitty one
(Attachment Link)
New one at his glorious place

Did you develop an issue with the old 'shitty' one  :-//

I have a Hanba badged version of the 968A+ that had been great until a few weeks ago when the soldering iron section started triggering an error that I haven't looked at sorting. The hot air side of it has been really good to have on the bench but I don't do a lot of SMD rework with it it is more a general purpose heat gun in my case with a bit of rework.
First of all the power was relatively low (took me long time to desolder some bigger components) temperature regulation was horrible and there was no power switch (always on).
With older some FETs took me several minutes to desolder with new one it's few seconds. Really it's uncomparable how better is new one. 
 

Offline BravoV

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Thermalright TR M.2-2280
« Reply #9282 on: October 15, 2019, 06:14:16 pm »
Thermalright NVME heatsink as mine is quite toasty. Quite surprised when hold it for the 1st time, as this thing is heavy for it's size.

Offline Tinderbox (UK)

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Re: What did you buy today? Post your latest purchase!
« Reply #9283 on: October 15, 2019, 08:23:51 pm »
Another multimeter for the collection,  :palm:
Iso-Tech IDM505, from evilBay for £75 with shipping costs included

I bought an ISO-TECH IDM505 as well from eBay a couple of weeks ago, They accepted my offer of £55 delivered for a brand new meter fully boxed , A steal for such an excellent meter.

He still has them for sale.

John.
 

Offline thm_w

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Re: What did you buy today? Post your latest purchase!
« Reply #9284 on: October 15, 2019, 08:43:42 pm »
Ordered 15 pcs of PCB and 10 sets of parts for my Gowin FPGA board. Despite I used 0.2mm/0.4mm vias and 0.1mm clearance between vias and traces, JLCPCB still approved the order.

(Attachment Link)

Youtube video is on its way. Could be a 3 video series, hardware design, hardware prototyping and EDA software & blinky demo.
If all goes well, it will end up on a fundraising platform soon after I land in China in 6 weeks, and I hope I can get it debugged and built while I'm still in US -- carrying parts is messy.

JLC will accept it but if its anything like my board they will chop up the gerbers a bit to fit some of their rules. The 0.4mm vias probably be OK, and its e-tested anyway so end result should be good.
There were a few rules I missed as I had not seen them specified before: hole to trace, hole to hole spacing, etc. Future orders I'm using these rules as a guide: https://github.com/ayberkozgur/jlcpcb-design-rules-stackups
 

Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #9285 on: October 15, 2019, 08:55:56 pm »
JLC will accept it but if its anything like my board they will chop up the gerbers a bit to fit some of their rules.

I know the rules, I just want to see what happens if I submit a design that violates them.
WellPCB can make 0.1mm track to via distance designs, but I'd like to give JLC a try.
 

Offline MosherIV

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Re: What did you buy today? Post your latest purchase!
« Reply #9286 on: October 15, 2019, 10:31:43 pm »
Another ebay steal......Megger LCR131 for £31


It is a bit grubby but should clean up nicely.

Do I need to do a tear down?
Dave has already done a tear down of the Keysight branded U1733B version of this LCR meter
 

Offline thm_w

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Re: What did you buy today? Post your latest purchase!
« Reply #9287 on: October 16, 2019, 12:52:40 am »
JLC will accept it but if its anything like my board they will chop up the gerbers a bit to fit some of their rules.

I know the rules, I just want to see what happens if I submit a design that violates them.
WellPCB can make 0.1mm track to via distance designs, but I'd like to give JLC a try.

Yeah let us know. You can see what I meant attached.
 
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Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #9288 on: October 16, 2019, 01:35:31 am »
Yeah let us know. You can see what I meant attached.

They are still plated and drilled -- what can go wrong (famous last words)?
 
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Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #9289 on: October 16, 2019, 01:46:48 am »
Cancelled my Surface Pro 7 pre-order. Overlooked the fact that its USB-C is not thunderbolt 3, so all of my docks won't work with it.

Replaced with XPS 13 2-in-1. Dell is running a good promo now -- $200 Visa prepaid card, $100 rewards, $50 off, 50% storage upgrade off plus standard discount and member discount.

After all discounts, the $1650 unit plus $60 OS upgrade, $50 white interior upgrade and $50 storage upgrade became $1360 plus tax.
 

Offline URI

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Re: What did you buy today? Post your latest purchase!
« Reply #9290 on: October 16, 2019, 06:54:59 pm »
Received a HP 8481D today.


Quick check with my HP 3335A shows it's working fine down to -70dB (in fact it goes down to ~-75dB).
A quick check with my cinesium low cost siggen (range: 34MHz to 4.3GHz) shows that it's level is frequency-dependent off in a range from -2dB to +3dB.

I'm happy since I only paid ~122€ delivered.   :-+

Now looking forward to checking my new toys to come; two HP attenuators that I'm waiting for being delivered.
A life without TEA is possible but pointless.
 

Offline mrjoda

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Re: What did you buy today? Post your latest purchase!
« Reply #9291 on: October 16, 2019, 07:19:48 pm »
pcbs for my project of 4 quadrant PSU arrived :) now i have to wait for parts (glitch in time managment :))

more info here : https://circuitmaker.com/Projects/Details/MEOWelectronics/4QPSU
 
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Offline thm_w

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Re: What did you buy today? Post your latest purchase!
« Reply #9292 on: October 16, 2019, 08:15:42 pm »
pcbs for my project of 4 quadrant PSU arrived :) now i have to wait for parts (glitch in time managment :))

more info here : https://circuitmaker.com/Projects/Details/MEOWelectronics/4QPSU

Very cool, you should make a project thread once you get it up and running. I'm trying to do similar with OPA548 but I suspect its current limiting is going to be trash compared to LT1970.
As you noted in the link you can boost the output stage with some external parts, interesting they have V+/V- pin to drive specifically, and the mosfets provide built in protection as well to clamp the output, super convenient.

Should C5 and R13 on the output be in series instead for a snubber? Or is it some other function.
 

Offline exe

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Re: What did you buy today? Post your latest purchase!
« Reply #9293 on: October 16, 2019, 08:47:05 pm »
pcbs for my project of 4 quadrant PSU arrived :) now i have to wait for parts (glitch in time managment :))

more info here : https://circuitmaker.com/Projects/Details/MEOWelectronics/4QPSU

Wow, that's cool! Could you please post schematic files in pdf?
 

Offline TheSteve

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Re: What did you buy today? Post your latest purchase!
« Reply #9294 on: October 16, 2019, 09:15:42 pm »
Cancelled my Surface Pro 7 pre-order. Overlooked the fact that its USB-C is not thunderbolt 3, so all of my docks won't work with it.

Replaced with XPS 13 2-in-1. Dell is running a good promo now -- $200 Visa prepaid card, $100 rewards, $50 off, 50% storage upgrade off plus standard discount and member discount.

After all discounts, the $1650 unit plus $60 OS upgrade, $50 white interior upgrade and $50 storage upgrade became $1360 plus tax.

"$50 white interior upgrade" ???
VE7FM
 

Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #9295 on: October 16, 2019, 09:52:13 pm »
"$50 white interior upgrade" ???

The carbon fiber deck comes in black or white, the white version being a bit more expensive.
But since the chassis is uncolored aluminum, I find the white interior more appealing.
 

Offline thm_w

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Re: What did you buy today? Post your latest purchase!
« Reply #9296 on: October 16, 2019, 10:22:15 pm »
Wow, that's cool! Could you please post schematic files in pdf?

Scroll down to "Releases" and click "Download files" on the right, everything is there.
 

Offline MosherIV

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Re: What did you buy today? Post your latest purchase!
« Reply #9297 on: October 17, 2019, 08:54:37 pm »
Another bargin.

Picked up this tool chest



In Halfords for £30
« Last Edit: October 17, 2019, 08:59:11 pm by MosherIV »
 

Offline vk6zgo

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Re: What did you buy today? Post your latest purchase!
« Reply #9298 on: October 18, 2019, 03:14:26 am »
Another bargin.

Picked up this tool chest



In Halfords for £30

I have one, just like that, but I left it out in the Sun, & it has faded to a lovely shade of pink!
 

Online Marck

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Re: What did you buy today? Post your latest purchase!
« Reply #9299 on: October 18, 2019, 11:31:10 am »
I got home from work and my new to me EBay Rigol DS1052e was waiting for me.  Fired it up amd it appears to be doing what it says on the box.  Now to learn how to use it.
 
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