Comments for The LED Artist - blog

Comment on Aurora 12 bar – Kit and PCB by Arun S Raj

Arun S Raj — Tue, 18 Aug 2020 10:01:26 +0000

hai
i am intrested this circuit board, how can i get this one & how much is the price

Comment on A Gatcha with PCB Panel by Wantoro

Wantoro — Wed, 28 Aug 2019 02:18:27 +0000

I made a hole version of JT Filament and it was very satisfying. Thank you for sharing. Now I am interested in the SMD version, can you share the schematic of the SMT JT Filament and what size of coil / Inductor do you use in this version?

You can send it to my email.

Thank you very much.

Comment on T962A Reflow Oven Hack Instructables by BETTY HUNT

BETTY HUNT — Mon, 29 Jul 2019 10:36:53 +0000

Great solution on Instructable. Thanks for sharing the hacks.

Comment on SMT Soldering 101 by BETTY HUNT

BETTY HUNT — Fri, 12 Jul 2019 12:25:27 +0000

Thanks for sharing the details of the tools. Can you please share any video related top SMT soldering? Thanks in advance!

Comment on Pocket High Voltage Generator Upgrade by Hank

Hank — Thu, 07 Feb 2019 07:34:02 +0000

After searching through my junk box for good transistors I came up with the 2SD669A for Q2.
Another one I will try whenever I order parts is the SFT1202E.

This is a great project but I found it gives low readings for zener diodes under about 80V, changing R5 to 68k gives it about a 1 ma short circuit output which helps.

It runs great on a AAA battery.

Thanks for posting this. Nicely done.

Comment on Variations on Nixie Power Supply Design by David Brenner

David Brenner — Fri, 14 Dec 2018 04:40:06 +0000

Thank you.

For opening the file you need Proteus 8.
Here is a screen capture of the test schematic: https://drive.google.com/open?id=1dpvToqal-dWDvKK9cVldF1_mBOGnHXHO

I will try to explain it a bit:
Bat2 + L2 + C6 are used as a few ms timer.
Rl1 simulates the real switch.
Bat1 is a 6 cell 1300mAh Ni-Mh battery.
R4 is the internal resistance of Bat1.
I use C5 because at startup the oscillator requires more power than usual.
R5 is the internal resistance of L1.
I use C7, C8, R9, R10 just in this schematic to collect data.
R8 discharges C2 at poweroff (without it the driver won’t start next time).
D2..D7 simulates a 6 x 6 2.7 V led matrice.

Comment on Variations on Nixie Power Supply Design by The LED Artist

The LED Artist — Wed, 12 Dec 2018 15:04:34 +0000

Hello David,

I can’t open the schematics you posted. Can you provide PDF or image files?

Comment on Variations on Nixie Power Supply Design by David Brenner

David Brenner — Wed, 12 Dec 2018 14:24:26 +0000

Hi.
Very good schematic.
Thank you.

I am trying to switch a schematic to use MOSFETs instead of bipolar transistors.
This is the schematic (made in Proteus 8):
https://drive.google.com/open?id=1Ir1-AEk6AAYCymXuCfZjmHmMZFkeVnOq
It has 2 versions (one for 16 mA output and one for 32 mA).
The input voltage can vary from 4..5 to 8.4V (default is 7.2V).
I used pnps because I couldn’t find the spice model for the STN851 (found only for STN951).
But in the final version it will have npns and/or n-channels.
My question is: is it worth switching to MOSFETs in this schematic?
If yes, can you please give me a few ideas/tips?

Thank you again.

Best regards,
David

Comment on Pocket High Voltage Generator Quick Build by 200V DC HIGH VOLTAGE POCKET GENERATOR - ATMega32 AVR

200V DC HIGH VOLTAGE POCKET GENERATOR - ATMega32 AVR — Thu, 29 Nov 2018 05:54:04 +0000

[…] Read more: 200V DC HIGH VOLTAGE POCKET GENERATOR […]

Comment on Pocket High Voltage Generator Upgrade by Javier

Javier — Tue, 27 Nov 2018 01:56:18 +0000

Thanks!