Search found 3578 matches

by Flashbang
Fri Apr 23, 2021 9:50 am
Forum: Electrical & Electronics
Topic: LED resistors
Replies: 26
Views: 396

Re: LED resistors

You are correct. But doing this gives the MINIMUM resistor value in Ohms required. Increasing the resistance a little lowers the current consumption but does not reduce the LEDs illumination level and it also allows more LEDs to be add to the power source! Of course, if the Ohm value is increased sh...
by Flashbang
Fri Apr 23, 2021 8:25 am
Forum: Electrical & Electronics
Topic: Flashbang's website problem?
Replies: 5
Views: 95

Re: Flashbang's website problem?

I've scoured Flashbang's website and for the life of me I cannot find a diagram called "Panel Indicators - Using Seep PM 1 or PM 4 motors With one wire to panel" Has it been removed? Thanks End2end No, Its here https://www.brian-lambert.co.uk/images/Point%20Switching%20Ind-single%20wire.g...
by Flashbang
Thu Apr 22, 2021 9:52 am
Forum: General Model Railway Discussion / News
Topic: Build railway dioramas
Replies: 3
Views: 54

Re: Build railway dioramas

Hi
Welcome to the forum.

I would suggest the 'Scenery' section is the best place.

Look forward to see your work :D
by Flashbang
Fri Apr 16, 2021 7:39 pm
Forum: Electrical & Electronics
Topic: third party power supply DC 19V 2800 mA
Replies: 4
Views: 130

Re: third party power supply DC 19V 2800 mA

Hi all A word of caution - Sorry! Ex PC power supplies or those that can provide excessive current that exceeds around 2 Amps at 12 volts need extra special wiring and some form of circuit distribution with individual down stream circuit protection - Fuses or self resetting Circuit Breakers. I would...
by Flashbang
Thu Apr 15, 2021 12:22 pm
Forum: Electrical & Electronics
Topic: Point motor CDU is weak
Replies: 11
Views: 331

Re: Point motor CDU is weak

Hi The diode in the main feed (D1) is there for two good reasons. A) On a DC supply it ensures positive is feed to the capacitors positive thus blocking accidental reverse polarity connection. B) On an AC supply it allows the positive half cycle only to reach the capacitors positive terminals. I wou...
by Flashbang
Wed Apr 14, 2021 8:42 pm
Forum: DCC Forum
Topic: Retrofitting LED directional lighting
Replies: 7
Views: 214

Re: Retrofitting LED directional lighting

Glad to of helped :D
by Flashbang
Tue Apr 13, 2021 8:19 pm
Forum: DCC Forum
Topic: Retrofitting LED directional lighting
Replies: 7
Views: 214

Re: Retrofitting LED directional lighting

As we have moved to DCC powered directional lighting then how about?.... https://www.expressmodels.co.uk/catalogue/head-and-tail-lights/dcc-locomotive-lights-4mm-scale/dcc-lights-for-diesel-locomotives-4-function/lima-class-66-detail With any DCC lighting via a decoder, the decoders Blue wire is Pos...
by Flashbang
Tue Apr 13, 2021 6:48 pm
Forum: DCC Forum
Topic: Retrofitting LED directional lighting
Replies: 7
Views: 214

Re: Retrofitting LED directional lighting

Hi As you have posted in the Electrical section of the forum I have to assume the locos are all DC, and not DCC powered. Have you looked at ready made lighting kits from suppliers such as Express Models or Illuminated Models? While Express Models are for the Lima model, Hornby used these, so they sh...
by Flashbang
Mon Apr 12, 2021 9:05 am
Forum: Electrical & Electronics
Topic: LED resistors
Replies: 26
Views: 396

Re: LED resistors

Hi
No problem and pleased to read you have your indications working.

The only stupid question is the one not asked :o Always ask and be sure :D
by Flashbang
Sun Apr 11, 2021 6:00 pm
Forum: DCC Forum
Topic: DCC Theoretical Question.
Replies: 18
Views: 307

Re: DCC Theoretical Question.

Biggest issue, is as always, Battery size needed to run a N or OO/HO loco for any reasonable time and also power to any Receiver too and then fit the lot inside the loco plus the RC receiver. You also need to either open the locos body and remove the battery for re charging or have some charging cir...
by Flashbang
Sun Apr 11, 2021 5:31 pm
Forum: Electrical & Electronics
Topic: LED resistors
Replies: 26
Views: 396

Re: LED resistors

Resistors are limiting the current to the LED, That is their most important job. By default they also drop the volts too. It doesn't matter if they are all in the supply wires or the return wires. But where for example a panel pair of LEDs indicate Normal or Reverse point position, then can share on...
by Flashbang
Fri Apr 09, 2021 9:18 pm
Forum: Electrical & Electronics
Topic: LED resistors
Replies: 26
Views: 396

Re: LED resistors

Thanks for that guys. I am using Guagemaster WM1 as the PSU. It is rated at 1.25 amps. I may be approaching its limit with these extra 26 LEDs as it is also powering station platform lighting and goods yard standards. We shall see when I fire it all up. If necessary I will separate into different c...
by Flashbang
Tue Apr 06, 2021 12:24 pm
Forum: Electrical & Electronics
Topic: LED resistors
Replies: 26
Views: 396

Re: LED resistors

Brian, Here is the link https://www.rapidonline.com/truohm-cr-025-10k-carbon-film-resistor-0-25w-pack-of-100-62-0394 Hi Thanks for the link. That is a good price. Your link goes to a 10K (10,000 Ohm) resistor, it should be 1K (1000 Ohm) is this one, same price though of £1.05 for 100 including VAT....
by Flashbang
Tue Apr 06, 2021 11:17 am
Forum: Electrical & Electronics
Topic: LED resistors
Replies: 26
Views: 396

Re: LED resistors

Either will be fine. 100 for 0.88p is an exceptionally good price Can you provide a link please as its seems far too cheap! You need to add Postage that Rapid slap on! Ebay sellers in the UK often have 100 1K for around £2.20 including P & P Example... https://www.ebay.co.uk/itm/1-4W-0-25W-Metal...
by Flashbang
Tue Apr 06, 2021 9:57 am
Forum: Electrical & Electronics
Topic: LED resistors
Replies: 26
Views: 396

Re: LED resistors

Just times the lit number of LEDs by their calculated current and you will have their total load placed on the power supply. Always allow headroom for the power supply current wise having it provide a larger current output than is needed. Usually a 12 volt 1.0 or 1.5Amp Regulated power supply is use...

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