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There are two devices appearing in the device manager when I connect the camera, but I wasn't able to install any of the drivers for those devices. Is there a guide somewhere on how to install the correct drivers?
you need to install the zadig drivers (winusb).

See Attachment, its for the pro, but similar to the regular seek.
best wishes.
Test Equipment / Re: Advice on buying Multimeter in India
« Last post by arif_senpai on Today at 06:00:15 am »
I already checked on the European store website. Unfortunate for me, they don't ship to India.  :(

The USD 180 is not the problem. I would gladly buy the EEVBLog Brymen BM235 (that's the only one on which I can get international shipping anyway). As I said I love the meter, especially the feature found only on the new range - Visible Beeplight on continuity mode. Super useful for me.
But the thing is , for something that costs USD 100, I am paying more than USD 100 just for taxes.

Anyway, I guess international shopping is the only way to get a decent meter.

In regards to using credit card on Aliexpress, that is super useful information. I'll try with a credit card(gotta ask some friend, no one in my family uses credit card  :P )

Thanks a lot, have a good day.
send a note to Texaspyro, Mark Simms, ask him if he knows anything about it.  They try the time-nuts archive if you haven't.
Test Equipment / Re: Siglent .ads firmware file format
« Last post by tv84 on Today at 05:54:03 am »

but where can I find the block with the fw file system.
How to read/interpret your listing, see attached file that I
cut & paste from your recent fw summary.


Oh, I see your problem!

The example that you provide is a SDS2000X file. Not a SDS2000X-E file!

This scope has a Blackfin proc and several FPGAs.

The X-E has an ARM proc. The structure of ADS is completely different, although the basic encryption envelope is pretty much the same.

You don't have a shadow file in the X version because it doesn't have a "file system" and/or linux environment.

Which is the equipment that you want to "analyze"?
Test Equipment / Re: Tektronix 2465B oscilloscope teardown
« Last post by z01z on Today at 05:53:09 am »
Also I'd like to replace the Keeper battery at some point but I cannot find a source for it on this side of the pond. There is an LTC-7PN sold on Ebay UK ( under a (rather convincingly named) brand called EVE or "Energy Very Endure". Has anyone used one of them? Looks like the difference is that the casing is metal rather than plastic. The US sellers I've looked at either won't ship overseas or charge an arm and leg.
Yes, the availability of the original battery in Europe is limited. Mouser sells it, sadly only in the US.
I did manage to get one from ebay a few years back, as you've mentioned it's not urgent for you, so you could wait and see if one appears.
Btw, these other brands can be had from retailers, for example Conrad sells the one you've found. These might be just as good as the original, but you never know. Unless you buy one and use it for 30 years :).
PEBKAC (or more accurately PEBOAK) error perhaps?
General Chat / Re: Brian Krzanich (Intel) has Left the Building
« Last post by NANDBlog on Today at 05:44:44 am »
This guy is still not in jail since his insider trading before Spectre and Meltdown?
I would've quit myself in that case.
FWIW Spectre and Meltdown had barely any effect on share price.
This has cost them 6%.
So only 1.5 million dollars...
It could've been disastrous for the company, Imagine if they would need to recall all datacenter CPUs.
Circuit Studio / Re: Advice Please
« Last post by Simon on Today at 05:43:48 am »
You can't open AD PCB files in CS unless you choose an old file format. Dave's ĀµCurrent project cannot be opened in CS and it's been around a while. It's sort of a dysfunctional family this Altium one and us children on CS are kept away from the grownups on AD. This would be why there is a separate support forum and separate so called documentation which is I guess a stripped down copy of the AD documentation. AD documentation and tutorials often shed light on things not explained for CS. there is the CS youtube channel that tells you the obvious and then they stopped posting video's right before they could have made it interesting. They have the comments disabled on the youtube channel and i can't think why....

It is almost all good now thanks to SMdudes idea! I've 'resoldered' the big Advantest chip next to the video RAM. (Would it be crazy to call that a GPU?)
Now only warning windows and pop up messages are broken ... ?
And I don't have a step attenuator installed yet ... 400$ replacement part :-\

I also tried fixing the the red stripe on the display, but nothing helps or even changes, so I bought a reasonably priced replacement display.

Test Equipment / TC1 lcr-meter transistor-tester fix
« Last post by zappenduster on Today at 05:38:36 am »
Hello eevblog forum,
here is my TC1 (TC-V2.12k) experience. If your tc1 doesn't switch on anymore check capacitor C11 and C12.

I got the meter two weeks ago (18 Euro ebay purchase, shipped from china to germany).
I tested about 20 components successfully and then: screen black. I no longer could turn it on.
It was not my fault - i surely did not connect a charged capacitor or external voltage to input terminals.
Only usb-charging function seemed still be OK: red LED for some time, then turned green.
U5 boost-IC of my flawed meter was getting hot; voltage at Cathode of D2 about 15V.
With some web-hints i figured out a faulty component: a short circuited C (C11 or C12 - not sure anymore which one; they are connected in parallel).
One of them got a 'short' of 120 Ohm. The other's value is 5uF. I replaced both with 100nF and 4,7uF electrolytic 100V-rating. Now the meter works again.
Cathode of D2 is now at 37V (47V during usb-charging). This voltage is generated for zener-diode testing.

While pcb-inspection i measured some capacitors: C8 = C9 = C14 = C15 = 9 uF. C10 = 118 nF
D1 = D2 = D3 = 'SL' marked diodes (schottky-type because U_f ~ 250mV).
U1 = 44-pin uC Atmega 324PA ; Y = 16MHz crystal
U4 = 8-pin uC STC15L104W for wake-up from sleep / measurement cycle / subsequent automatic power-off
U5 = 6-pin boost/step-up IC. Marking AL718 (another forum-post states AL605)
U6 = 6-pin charge-IC
ZD1 = zener-diode 6V8 ; DZ2 6-pin marked V05. Some pcb miss those two elements - maybe earlier layouts...
battery = li-ion 3.7V 450mAh ; some tc1 got a much larger battery (2x base area)

At this position there would be a picture of my handmade pcb-to-schematic translation together with the actual pcb - but i can't insert them here... You can find them attached at the end of this post.

Current consumption is 300..400 mA (On-state) and 0,2mA in Standby/power-off). That means 150mAh per month (0,2mA * 24h * 31 days). So a fully charged battery would be drained after three months of non-use.
While measuring the circuit sometimes this happened: Standby current 0,2mA switched to 10mA for 25 seconds. Then it sank to 15 uA and remained there till next (On-)Button pressing.
After some trial and error i ended up adding a 33k resistor to the 5V-regulator output (soldered piggyback onto C15). This seems to do the job of triggering the 10mA_for_25s period immediately after shutdown. By that sleep-mode is reached safely.

Operational states (duration/current): 25s -> 25s -> sleep
25 seconds: On-button was pressed, screen is lit, meter tries to identify connected component. I = 300..400 mA
25 seconds: 10 mA current draw after automatic shotdown, screen black
xx seconds: 15 uA sleep-mode till next button pressing / measurement cycle
If i keep my tc1 busy (pressing button repeatedly) sometimes the sequence is 170s-170s-sleep. I don't know what goes on here...

IR remot control detection:
The ir-indicator (red dot in upper-right corner of screen) is flickering sometimes although input-area is covered up. I added a 100nF capacitor between Ground and Vcc of ir-receiver. But no change, this intermittend behavior is still there...

My guess about U4 port-configuration: Pin_1 is configured as interrupt: pressing button wakes device from sleep. Pin_3 switches on U5 boost-ic. Pin 5+6 used as common input to determine desired automatic power-off time (10s/15s/20s/25s - depending on connections P1/P2 <-> Ground/U4_Vcc).
About U4 functionality see also$20-lcr-esr-transistor-checker-project/msg1553608/#msg1553608

TC1 manual:$20-lcr-esr-transistor-checker-project/?action=dlattach;attach=310740
TC1 high-resolution pictures:$20-lcr-esr-transistor-checker-project/2225/
TC1 review + hr-pics:
uC STC15L104W is described/listed here:

Some web search brings up T6 labeled models (monochrome display, ir-receiver is placed on screen's right side). T7 looks the same as tc1. At startup it shows a brand/firmware name for a second.

Indicated data of tc1-testet components:
As review states, scr/triacs are partly recognised as resistor or BJT; h_FE values of darlington-transistors with BE-resistors are much too low. 
To me also capacitor ESR-values seem low: My Peaktech 2063 LCR-meter shows much higher values (it's presumably identical to Extech 380193 meter; component test-frequency can be switched from 120Hz to 1kHz)
What do you think of those misrepresentations/discrepancies? Can i just add a fixed offset to displayed capacitor ESR-values?

Thank you to eevblog and previous contributors to that matter...

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