Junctionmad

Vf isn’t a fixed point anyway it has a range powering leds from a non current limiting power source is simply bad design practice, don’t do it end of story

yes that can power up the Digital IP Cobalts fine , you just cant use DC track power, but you clearly understand that You can use the CLR switch on the Cobalt independently to switch the frog using the DC track supplies from your Dc controller of course

not a clue whats drawn here - sorry

jeepers , many posts arguing about not using a 2 cents resistor Leds need a current limit , thats easiest to implement as a resistor . End of story ( minute edge cases not withstanding )

A short circuit is a theoretical circuit with zero ohms , in theory powered by a perfect voltage source ( output resistance =0) means that in theory infinite current flows instantly in that circuit , it would not be possible to “ frog juice” such a circuit however , real circuits( including so called short circuits ) have finite resistance and power supplies are not perfect voltage sources , ie they have >zero output resistance . There are also capacitances and inductance in the circuit, both stray and deliberate hence in a situation where a wheel bridges the DCC supply, which is what happens in a incorrectly set frog , the command station “ sees” a substantially lower loop resistance , ( but not zero ) , equally the command station is not a perfect voltage source . Hence there is an appreciable rise time to the current that starts to flow hence the juicer electronics , which can react much faster then the rising fault current can therefore “ intervene “ and switch the polarity before the booster trips. Nothing in this is “ stressing “ the electronics , in any part of the circuit , the DCC voltage never changes , it’s no difference then if a pile of motors got switched onto the track at the same time obviously to prevent the electronics competing , the frog juicer current trip point needs to be lower then the booster protection trip point current sensing , including short circuit current sensing is a completely common and valid detection technique in electronics. Despite comments from the unaware that they feel its “ wrong “ it’s entireky practical , common and safe

We use the Z21 with all wireless phone/tablet throttles , five operators , works great , we have a dedicated signal man with a conventional mimic panel and interlocked Lever frame. Drivers drive to signals JLTRT dave

This is electrical nonsense , juicers detect rising current and switch around 1-2A , voltage never changes , no arcing , no , zero risk to decoders as they simply don’t see anything . It’s simply current sensing as the loop resistance is not zero and the current rise is far from instantaneous ( it’s quite slow as far as modern processors and electronics go ) The people that criticize juicers seem to have a less then adequate understanding of current sensing technologies and basic electronics and then advance “ theories “ based on that faulty logic , they rarely seem to have any direct experience with 50 juicers and being an electronics professional , they work well , the short you described after derailing has nothing to do with juicers , it occurs on conventionally switched points as well if the old fashioned manual frog switching works for you , then carry on

Grill is gone on the Leaf and Kona

for 3mm leds , on 5V I regularly use 1.8KOhms , as I find modern LEDs only need about 1-2mA these days

Yes

In my experience juicers are excellent and have the advantage that you can trail through points without a short circuit

all looked after by the wondrous built in microprocessor !

you did notice the emoji !!! I commented because the OP is using switches and looking to fix the issue . Its an say issue to fix and it doesnt need ripping out everything stud and contact is fine but its rather dated at this stage dont you think. Switches can be got for a dime a dozen etc

we just finished 100s of dropper onto the bottom of PECO rail. ( anybody can solder to teh side ) I (a) cut away 2-3mm of the web, just enough to get the iron head in (b) rub the area with a file to create a bit of grip (c) tin both sides , ie the rail bottom and the wire (d) I then bend the wire through 90 degrees (e) and usually using NO additional solder, bring the wire to the rail and bring the iron to the wire I use a Hakko 50W with a 3mm chisel bit and Sn63Pb37 (eutectic) flux cored solder no issues

Saturday 15th June 1pm to 5pm , come along and see our O gauge layout "Little Siddington " up close , discuss its construction , natter about all things O Gauge , use our O gauge test track , Light refreshments provided

A bit like saying “ a sure fire way to ensure you don’t wear out your car , use a horse “

There’s a very good review of dc controllers and their waveforms here https://www.scottpages.net/ReviewOfControllers.html Along with some circuits for simple feedback unit

The only issue with this is where the two controllers meet via a connected track and one controller is in " reverse " , at that point you will create a short , but the comspeed ( from memory ) has short circuit protection . The proviso in red you mention is largely if the layout is wired as Common Return . Where you connect multiple AC devices , ie each controller has a bridge rectifier , there can exist an imbalance in the ground return circuit where potentially current from one controller can return via the ground of another , often exceeding the specifications of the bridge rectifier. The common solution is a very small value resistor in the DC ground line . However in many cases the issue simply never materialises ( to the extent that it causes issues ). MERG AC powered kits often added this resistor as they were driven off a common AC bus

If there were drawn up by you based on reverse engineering the circuit there is no copy right issue , as you cant copyright a design or an idea, merely a written description of it

I agree the zimo chips are brilliant at that price

There is no need for TR1 equally a CD40106 CMOS Schmitt input Hex inverter would do the job , and provide support for eight sets of LEDS in one package , will run directly off the 12 v supply .

The only good thing about the duette was the chunky control knobs , I duplicated them in my 3D printer

Great layout , terrible music !

Edge cases are just that best practice is not to rely on joiners and do rely on copper ! Theres good reason to follow best practices even if from time to time you meet the odd case that works

I’m in the business of selling digital downloads the new rules since 2018 do not require me to (A) supply the download to every EU country (B) offer the download at the same price across the EU what I can’t do is force people to buy through a specific country web site nor can I discriminate the nationality of the purchaser but the specific web site does not have to suppprt download into that persons country ( and many copy right licenses often prohibit it ) hence train controller can have a uk web site and a German one. The pricing does not have to be the same what he can’t do is prevent a uk national buying on his German website but he can prevent a download into the uk from that site provided that provision applies to anyone buying on that site. Ie a German In Germany must also be prohibited from downloading it to a uk location note that such geo fencing is full of issues that the digital directives overlook and verification can be very problematic. I do do not see how train controller is breaking the digital directives even if I don’t agree with what he is doing as for the 12 April , 29 may or whatever I just keep humming that iconic eagles song !!!! The dongle sale will of course fall outside the digital directives Dave