ATiny-4

[Geo]

Hello Geo.

Your right, there are some parts that are not easy to get, the opto is for sale at Conrad.de , not cheap.

Hi Ap.
Thanks for your reply.
There is a big problem............ i don't understand German so i will look for a English language shop.
Anyway... thanks
Regards.

[Max]

Hello Geo.

Your right, there are some parts that are not easy to get, the opto is for sale at Conrad.de , not cheap.

Hi,
yes it's an insulated gate driver (2.0A rated output) for IGBT thing.

Here is datasheet. It's not easy to find and , as far as I know, it hasn't any direct replacement... so if one can't find it he must do another way... using e.g. some discrete components and ic to drive gate... then bypass the problem.

PS: mouser.com has it in dip8 and cost is $2.21 each so about 1.5eur each, but you have to make international order (they are in the USA... and Europe site will mail you stuff only if they have in stock there...otherwise from US... anyway you'll pay much more than 1.5eur about shipping).

[ApBerg]

Hello Geo.

Your right, there are some parts that are not easy to get, the opto is for sale at Conrad.de , not cheap.

[Geo]

Hi Ap.
I have seen this forum.
Now about the pcb you can make the original pcb. They give the schematic and the one side pcb. But the big problem is the HCPL3120. I found some shops but they sell only big quantities. If you have any adress of eshop that have this IC please give it to me.
Regards

[Geo]

...2.8m with a coil 28cm...!!!?

Even if it was from German - it is to much!

I agree. But for 28 cm coil if i will detect the half (1.4m) it is a good depth for me.
I have a practical way for the depth. As i have seen i can detect a big object at max distance equal to 3...4 times (very difficult x 5 times) the coil diameter.
So 28 cm x 4 = 112cm, or 28x5 = 140cm.
This is the reason that i want to construct it

[ApBerg]

Hello Geo

There is a forum on the same site, the people that have built the ATiny-4 give good results, I have ever had the plan to make it, made the layout in SprintLayout-4 , but never made the pcb , so there can be errors in the layout ! The original layout can also be used, but i found the pads to small.

Best regards.

Ap

[roberts]

...2.8m with a coil 28cm...!!!?

Even if it was from German - it is to much!

[Geo]

Hi.
I am interesting to construct the ATiny4. As i readed at http://www.pulsdetektor.de/index.html ATiny4 can detect an object (max distance) at 2.8m with a coil 28cm. This distance with this coil is far better from any PI detector that i have made.
One problem for the time is the IC...HCPL3120. Does anyone knows where i can find it or if there is a similar one???
Or if anyone knows any problem of this detector please tell me.
Generally i want your opinion about this detector.
Regards