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Thanks for clairifying that for me Bugi ,
I was coming to the realisation the buck stopped with me ,and either way Im stuck with the charge . :horse: ;
I was expecting  for Feeltech to cover any costs associated ,which I think is only fair really ,looks unlikely at this stage though.
Maybe the next package Fed-ex delivers I can produce the invoice and pay them on the spot in cash. :D

EEVblog Specific / Re: eevBLAB #53 - Beware of Trademark Scams
« Last post by EEVblog on Today at 12:15:09 am »
The one I'm seeing most of right now is companies making genuine-looking 'invoices' for domain name registration, which are actually just disguised offers for search engine optimisation.

I used to get those a few years back, but haven't had one for a long time now.
If you are OK working with static-sensitive devices, you may try to assemble my phono stage. It is also FET only, passive EQ circuit  ;) . To my ear it is better than the Pacific and you can get the FETs from a reputable source, like Mouser or Digikey. You can replace M4 with a 10 Ohm resistor for simplicity.


Yep it is a current shunt. The whole idea behind it is that the battery ground and the supplied circuit ground will remain separate.

Measuring the charging current with a low-side resistor is therefore easy and practical (you just measure its voltage referenced to ground).
The 87V is ideal for the regular poky proddy work. It's very quick and though there aren't many features, those features work well.
AFAIR, PCLKT* inputs are "true" clock inputs and PCLKC* are "complementary". Not 100% that it matters when dealing with single-ended clocks, but I would connect your 40 MHz oscillator's output (which I assume is single-ended) to a PCLKT* input instead of PCLKC0_1. This is what I've always done with single-ended clocks on those FPGAs. You may check in the datasheet if it really matters or not.
Circuit Studio / Re: How's CS progressing? Is it no longer "beta"?
« Last post by trevwhite on Today at 12:10:16 am »
My experience is the same as others. It does the job but has its qwerks. For the money I am happy with the product itself.

My one gripe is that support is a layer removed from Altium. I believe Farnell are supposed to support the product but if you have any difficult questions that require a response from the actual company, they pretty much are not interested. They do not reply to emails regarding CS issues. It leaves a slighlty bad taste in the mouth and is the reason I have stuck with V1.4 instead of paying the yearly figure to upgrade.
The software does work and import of step files for library parts is a great feature. I just wish they woul emply someone to handle customer support.


Test Equipment / Re: Test Equipment Anonymous (TEA) group therapy thread
« Last post by bd139 on Today at 12:08:09 am »
I'm going to review it next to the BM867s and the U1241C so will see who gets beaten. It's going to be a tough match :)

Bored so browsing aliexpress. These look like a cheap bit of time nuttery fun ....
Buy/Sell/Wanted / Re: Wanted budget power supply
« Last post by coromonadalix on Today at 12:07:30 am »
Well  if you do build, repairs things  etc ...  the current limiter is an obligation to have ...

It depends of the psu you find,  some of them as i said can be safely hacked of can be made variable ...

The Ebay links i gave you are enough for a start ...

Here's an link to an variable current and voltage DIY psu

You have an thread here :

The circuit 3 design is very good, and doesn't cost a fortune in parts, but you have to get an ammeter with an shunt in it ??? around 0.47 - 0.5 ohms i think, to be in the 3 amp current range,   (for the current limit, pins 2 and 3 of the lm723)

Hameg 8122 Universal Counter - teardown, repair and test
Kaizer Power Electronics
Published on Sep 24, 2018
The Hameg 8122 is a programable universal counter / timer that has 3 inputs. Channel A and B from DC-150 MHz at 300 Vp-p and channel C from DC-1.6 GHz at 5 Vp-p.

I accidentally broke a knob off the instrument when moving and while I wanted to repair it, I might as well give a teardown of the unit. Finding a replacement part was not easy, but a cheap alternative solution was found.
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