Author Topic: Controller resistor network question - red version  (Read 1420 times)

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Offline Ian.

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Controller resistor network question - red version
« on: August 06, 2013, 04:01:28 PM »
Hi,

I'm working through building the controller (pcb 10 version 3. 7/2013) and I'm after a bit of advice on resistor network component RN41 this is made up of two, six pin packages but I don't know which way the 'dot' should be indicating the start of the network, or does it not really matter.

Thanks in advance
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Offline miraculon

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Re: Controller resistor network question - red version
« Reply #1 on: August 06, 2013, 04:30:16 PM »
Those are the isolated type and are symmetric. The other "star", bussed types are important to get the common pin correct (at the square) but these two don't matter. Why there are two "RN41's" is anyone's guess.

Greg H.


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Offline Ian.

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Re: Controller resistor network question - red version
« Reply #2 on: August 06, 2013, 04:44:40 PM »
Thanks Greg that's answered my question, so I can crack on.

Thanks again
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Offline Cutty Sark Sailor

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Re: Controller resistor network question - red version
« Reply #3 on: August 06, 2013, 06:07:27 PM »
Those are the isolated type and are symmetric. The other "star", bussed types are important to get the common pin correct (at the square) but these two don't matter. Why there are two "RN41's" is anyone's guess.

Greg H.

One for Ch A and One for CH B? Isolation? :?:
 

Offline miraculon

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Re: Controller resistor network question - red version
« Reply #4 on: August 06, 2013, 07:54:10 PM »
Those are the isolated type and are symmetric. The other "star", bussed types are important to get the common pin correct (at the square) but these two don't matter. Why there are two "RN41's" is anyone's guess.

Greg H.

One for Ch A and One for CH B? Isolation? :?:

Possibly, but I would think that crosstalk within the resistor network would be low enough with the resistor-to-resistor "isolation".

Greg H.
« Last Edit: August 06, 2013, 07:56:19 PM by miraculon »


Blitzortung Stations #706 and #1682
CoCoRaHS: MI-PI-1
CWOP: CW4114 and KE8DAF-13
WU: KMIROGER7
Amateur Radio Callsign: KE8DAF

Offline Ian.

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Re: Controller resistor network question - red version
« Reply #5 on: August 08, 2013, 03:25:58 PM »
All done, made a schoolboy error not bending the caps down under the discovery board, new ones fitted now and online, station ID 723, stand by for more questions  :grin:
CWOP - DW3371
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