The Blinker in a Side-View Mirror - What's Inside?

RE: The Blinker in a Side-View Mirror - What's Inside?

jw0752 — Sat, 05 Sep 2020 02:37:40 GMT

Only an engineer would turn a traffic accident into an electronics experiment. Bravo!!

My car goes in to the garage on Tuesday for new tire pressure sensors. I already have it on my list to get the old ones to put on my operating table.

John

RE: The Blinker in a Side-View Mirror - What's Inside?

DAB — Fri, 04 Sep 2020 17:52:10 GMT

Nice analysis Jan.

DAB

PS, I think you meant to say four resistors in parallel to get the wattage.

RE: The Blinker in a Side-View Mirror - What's Inside?

Jan Cumps — Fri, 04 Sep 2020 16:50:47 GMT

More sleuthing: the zener is a Nexperia BZX84-C4V7BZX84-C4V7. A 4.7 V Zener.

RE: The Blinker in a Side-View Mirror - What's Inside?

Jan Cumps — Fri, 04 Sep 2020 16:38:10 GMT

I think the first component, that looks like a capacitor but is all white (and does not look ceramic, and in this schema's context makes no sense if it is a capacitor) is a TVS input protection diode.

Würth and Murata have a few that look exactly the same as the one on this PCB:

[View:/resized-image/__size/455x230/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-9082f995-d2c2-46ea-9674-9dbf0cc607ec/contentimage_5F00_192238.png:455:230]

RE: The Blinker in a Side-View Mirror - What's Inside?

phoenixcomm — Fri, 04 Sep 2020 16:33:28 GMT

Wonderful write-up. I like how you generated the schematic from the PCB (neet). Sorry about the Benz. [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-9082f995-d2c2-46ea-9674-9dbf0cc607ec/contentimage_5F00_2.png:16:16]

RE: The Blinker in a Side-View Mirror - What's Inside?

kmikemoo — Fri, 04 Sep 2020 16:08:58 GMT

Very cool. So sorry on losing the mirror but nice that you got something out of the event. Even nicer that you shared it.

RE: The Blinker in a Side-View Mirror - What's Inside?

balearicdynamics — Fri, 04 Sep 2020 14:58:36 GMT

Nice job [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-9082f995-d2c2-46ea-9674-9dbf0cc607ec/contentimage_5F00_2516.png:16:16] [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-9082f995-d2c2-46ea-9674-9dbf0cc607ec/contentimage_5F00_2516.png:16:16] [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-9082f995-d2c2-46ea-9674-9dbf0cc607ec/contentimage_5F00_2516.png:16:16]