MOTOBRICK.COM

TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: dale on August 02, 2018, 09:08:11 PM

Title: Adding a resistor to reduce the flashing speed of indicators
Post by: dale on August 02, 2018, 09:08:11 PM

I am about to add in resistor(s) in parallel between ground and the positive wire coming from the relay box which goes to an indicator.
Ive been reading a lot of different methods for rectifying the old indicator speed but havent seen this.

I will add a couple of resistors per indicator in parallel as i am anal and want to avoid overheating.

Someone stop me before i try this tomorrow

Title: Re: Adding a resistor to reduce the flashing speed of indicators
Post by: rbm on August 02, 2018, 10:55:05 PM

Although you haven't explicitly mentioned it in your post, should we assume that you are replacing the incandescents with LEDs.

If so, then don't use ballast resistors as you intend.  They may work for Jap bikes with a simple flasher relay but they aren't great for BMWs with a complex flasher module.  There are three techniques to slow down the hyperflashing:
1. cut a trace on the PCB of the flasher module (http://www.motobrick.com/index.php/topic,659.0.html) to prevent hyperflashing
2. add a parallel capacitor to the circuit (https://maru-labs.com/wp-content/uploads/2017/02/Blinkfrequenz_verlangsamen.pdf) in the flasher module
3. modify the flasher module (http://www.motobrick.com/index.php/topic,659.0.html) to make a LED friendly DIY version

Title: Re: Adding a resistor to reduce the flashing speed of indicators
Post by: kioolt on August 03, 2018, 12:03:56 AM

If you add a couple of resistors to each indicator make sure that you double the resistance of the individual resistors used.

Title: Re: Adding a resistor to reduce the flashing speed of indicators
Post by: dale on August 03, 2018, 12:12:30 AM

I am actually just using normal 6watt globes for the indicators and had planned on adding Power resistors.
I have accounted for adding the resistors in parallel.


Thanks for the links, RBM. I have read links 1 and 3 before but haven't seen the Maru labs one.
Translating and reading now

Best regards

Title: Re: Adding a resistor to reduce the flashing speed of indicators
Post by: Laitch on August 03, 2018, 12:27:20 AM

Quote from: dale on August 03, 2018, 12:12:30 AM

I have been searching for an English version of the Maru labs link but have not had luck.

Try here (https://cafe4racer.eu/en/others/296-marulabs-bep-3.html), click Downloads then scroll down the list. The English version is next to the last selection.

Title: Re: Adding a resistor to reduce the flashing speed of indicators
Post by: dale on August 03, 2018, 12:30:26 AM

thanks Laitch i ended up using google translate

Title: Re: Adding a resistor to reduce the flashing speed of indicators
Post by: dale on August 05, 2018, 05:22:29 AM

Adding the two resistors in parallel is now working. I'll update the post if it fails

Title: Re: Adding a resistor to reduce the flashing speed of indicators
Post by: Laitch on August 05, 2018, 08:29:26 AM

Quote from: dale on August 05, 2018, 05:22:29 AM

This is now working. $3 and 15 minutes to connect. I'll update the post if it fails

How about verifying what worked right now, Dale?

Title: Re: Adding a resistor to reduce the flashing speed of indicators
Post by: dale on August 05, 2018, 04:59:39 PM

Adding 2 separate resistors in parallel, in order to reduce the speed of the indicators to 1 per second, Liatch.