Page 1 of 1

otgw partslist

PostPosted: Sun Jan 08, 2017 5:18 pm
by rickvanderzwet
Some of the parts listed at http://otgw.tclcode.com/schematic.html#partlist are no longer available at Conrad. I have an updated list for some of the common parts (the resistors), yet for some parts I am not able to find it next-gen alternative.

The replacements I found are:
    403334 - 89 -> 1089155 - 89
    403393 - 89 -> 1089161 - 89
    403130 - 89 -> 1089135 - 89
    403172 - 89 -> 1089139 - 89
    403083 - 89 -> 1089714 - 89
    403199 - 89 -> 1089141 - 89
    403261 - 89 -> 1089148 - 89

The ones I still looking for replacements are:
    155020 - 89 (Transistor BC548B TO92) -> ???
    156911 - 89 (Spanningsregelaar KIA7805API KEC TO 220) -> ???

Re: otgw partslist

PostPosted: Sun Jan 08, 2017 6:12 pm
by hvxl
The transistor doesn't really have to be a specific type. Pretty much any NPN transistor will do. If you still have some in your box of components, they will probably work. The only requirement is that they can handle a collector-emittor voltage of 30V. If you have to order one from conrad, just pick the cheapest TO92 NPN transistor. At the moment that is 1262957 - 89.

Unfortunately the voltage regulator is less clear. Without actually testing them it's hard to be sure if they are still able to produce a steady 5V output when the input voltage is around 25V. Experience has shown that not all TO220 7805 can do that equally well. The ones in TO92 package usually can't. Conrad currently seems to have 2 reasonable candidates: 175030 - 89 and 179205 - 89. The data sheets of both devices suggest that they should work correctly between 8V and 25V. Given their price I would just order both and check on the bench which input voltage range they can handle. If you do, it would help others if you report back your findings.

Re: otgw partslist

PostPosted: Sun Jan 08, 2017 6:27 pm
by marcelr
Had the same issue last spring.

I bought the 175030 voltage regulator and the 1262960 NPN transistor from Conrad for my second OTGW. Soldered them onto the pcb (together with all other components), programmed the PIC, plugged it in and it worked immediately. Has been working ever since, without glitches.

Re: otgw partslist

PostPosted: Sun Jan 08, 2017 6:56 pm
by Templar
This works for me too:
156911 - 89 (Spanningsregelaar KIA7805API KEC TO 220) -> 157954-89 9RECOM R-78E5.0-0.5 DC/DC-converter)

Re: otgw partslist

PostPosted: Sun Jan 08, 2017 10:54 pm
by hvxl
Thanks all. I will update the parts list.

Re: otgw partslist

PostPosted: Mon Jan 09, 2017 10:10 am
by adijk
@hvxl: maybe you could put a part in where the bigger transistor and the RECOM-replacement of the 7805 is mentioned? That way people know up front about the upgraded availabilities regarding powering other devices. I'm also happy to supply the text if you need me to.

Re: otgw partslist

PostPosted: Mon Jan 09, 2017 12:25 pm
by rjblake
Damn! I went and splurged on a more expensive transistor (well, only €0.16 more) - part number 563804 - 89.

I also installed the RECOM R-78E5.0-0.5 DC/DC-converter, print 24 V/DC 5 V/DC 500 mA (part 157954 - 89) and used the EI 30/15,5 printtransformator VB 2 VA Primair: Secundair: 2 VA VB 2,0/1/15 Block (part number 710564 - 89) transformer so I could run an Adafruit Huzzah ESP8266 directly connected without the need for additional power supplies or circuitry. All measurements were nicely in spec and has been solid as a rock since I installed it a month ago.

Re: otgw partslist

PostPosted: Mon Jan 16, 2017 11:55 pm
by rickvanderzwet
hvxl wrote:Thanks all. I will update the parts list.


Thanks for updating. I ordered the list. Will report back when assembled successfully to ensure the part list is indeed to our liking.

FYI: The optional components (enclosure & connectors) are the tipping-point of whether or not to pay shipping, so they basically comes free :-).

Re: otgw partslist

PostPosted: Tue Feb 21, 2017 4:52 pm
by wolfram5512
Can I order 1417693 - 89 instead of 1089139 - 89 ?

Yageo CFR-25JT-52-220R Koolfilmweerstand 220 Ω Axiaal bedraad 0207 0.25 W
instead of
Royalohm CFR0W4J0221A50 Koolfilmweerstand 220 Ω Axiaal bedraad 0207 0.25 W

The 175030 - 89 worked for me

Re: otgw partslist

PostPosted: Wed Feb 22, 2017 5:04 pm
by hvxl
I would be very surprised if that one doesn't work just as well.

Re: otgw partslist

PostPosted: Wed Feb 22, 2017 6:22 pm
by wolfram5512
Thanks Shelte

Re: otgw partslist

PostPosted: Wed Nov 29, 2017 10:04 am
by rickvanderzwet
rickvanderzwet wrote:
hvxl wrote:Thanks all. I will update the parts list.

Thanks for updating. I ordered the list. Will report back when assembled successfully to ensure the part list is indeed to our liking.


Finally got some time to assemble and test the unit. Working like a charm.