Recent Posts

1

Beginners / SOURCE CODE of BSIDE01 : WHERE I CAN DOWNLOAD IT ?

« Last post by simbeault69@gmail.com on Today at 04:58:14 am »

I would like to see if i can add him a function generator.

2

General Technical Chat / Re: Russia and China to Build a Nuclear Plant on the Moon.

« Last post by coppercone2 on Today at 04:51:01 am »

this sounds like the plot of 'star wreck'

3

Buy/Sell/Wanted / Re: FS: Affordable DMM Checkers: AC Reference, DC Reference, OHMS Reference, etc.

« Last post by Majorassburn on Today at 04:41:12 am »

I design 'em and build 'em and they REALLY work! 
UPDATED eBay Links:
https://www.ebay.com/itm/285827428604
https://www.ebay.com/itm/285827427931
https://www.ebay.com/itm/285827426636
Also, Added a Brand New Fluke 87V DMM:
https://www.ebay.com/itm/285823885283
Thanx for looking! 

Updated all eBay links and added a brand new Fluke 87V DMM (2 extras) For Sale.

4

Beginners / Re: Under which conditions does NPN astable multivibrator start oscillating?

« Last post by KubaSO on Today at 04:37:39 am »

Astables are nasty because they really need at least one proper push pull emitter follower stage, ideally two for full symmetry. Just buffer the right-hand transistor's output with a complementary follower and use that to drive the capacitor going to the left transistor's base. You get square wave on the output.

5

Power/Renewable Energy/EV's / Re: Why are all Vicor PI3 modules suddenly out of stock or obsolete?

« Last post by mtwieg on Today at 04:34:42 am »

I browsed through some of these obsolete parts. For some, Vicor did issue a PCN Obsolescence/ EOL notice, mostly in January 2021 or January 2023.

But for many like this one, there is a document from Digikey stating that they were not given any notice by Vicor either. I've never seen such a thing before, definitely a very bad sign for Vicor and their customers.

6

Power/Renewable Energy/EV's / Re: Dual Complementary Rectifier PSU

« Last post by virusx2 on Today at 04:28:04 am »

Thanks a lot!

I don't want to calculate the currents strictly mathematically, but i want to go with some “design” equations to be as close enough as i can.

Maybe there are different rations of DC-to-RMS for the single ended loads and the common mode +-15V?

7

General Technical Chat / Re: Is LinkedIn worth keeping?

« Last post by Halcyon on Today at 04:26:28 am »

I hate social media, but to Linkedin's credit, I found my current job on Linkedin (it wasn't advertised anywhere else).

For certain industries it can be very useful.

8

Beginners / Connector name

« Last post by canadmin on Today at 04:25:38 am »

What is the name for this connector? Is there something other than 6 wire?

9

Projects, Designs, and Technical Stuff / What is the 'go-to' MQTT broker software for local home setup

« Last post by Wilson__ on Today at 04:22:53 am »

Which MQTT broker software is widely used, active community, run on home LAN (not facing internet), low traffic temperature sensors, small number of subscriber? 

Is Mosquitto on Raspberry Pi good?   

Pointer to learning material, get-started PDF guide, youtube, etc.   Many thanks

10

Projects, Designs, and Technical Stuff / Re: PC74hct4046ap Replacement

« Last post by BrianHG on Today at 04:14:02 am »

Thanks for the input:

1, its not my design
2, the colock works fine already, but I'm trying to get "more" out of it as its in a very important section.
3, I have no idea how to redesign it.

I'm just trying to get the lowest noise/jitter out of this VCO setup. I can't change the other custom chip only the VCO chip which is PC74hct4046ap made by Philips.

I have a scope and I did see the output 11.2XX frequency and it was pretty badish. I'm new to this and just want to get a better frequency output!  Thanks

instead of playing with the IC, try playing with R303, R304, R334 and C302.
Also adjust R302.