anyone know of one?

 

The Bosh is what we call a "form C" relay or "Single Pole Double Throw" relay.

One can make logic gates from relays. Making a relay from a logic gate would be sort of like making a coldcut from a sandwich.

Are you perhaps looking for a solid state relay?

 

The Bosh is what we call a "form C" relay or "Single Pole Double Throw" relay.

One can make logic gates from relays. Making a relay from a logic gate would be sort of like making a coldcut from a sandwich.

Are you perhaps looking for a solid state relay?

well what i am doing is making sequential turn signals. the problem is if i have the parking/running lights on and i turn my turn signal on that the leds need flash and not just stay on as running lights.

having problem cordinating both

solid state relays are expensive i am hoping i dont have to go that route

 

Okay. Where does the Bosh relay equivalent come in?

 

Okay. Where does the Bosh relay equivalent come in?

dont think this could work?

 

This doesn't show the internal workings of the relay. A "C" form relay has one or more sets of contacts, each set with three terminals, a normally open [NO] & a normally closed [NC] contact wired in series with a common terminal connected to the junction between them. My guess is that wires #85 & 86 are the coil leads, wire #30 goes to the common, #87a to the NC & #87 to the NO contact.

I'm not familiar with the wiring on newer cars but the older ones had bulbs with two filaments or more than one bulb, one for the parking/running lights & the other, brighter one for turn signals & brake lights [on the rear]. Hopefully you have two sets of LEDs or have the space to add them.

As for operating the sequential turn signals you can use either a stepping relay or a shift register & LED driver transistors. To save some time & money you might cruise a few auto salvage yards & see what's there.

 

Schematic of the Bosch relay as used in this application:


Schematic of solid state circuit which should accomplish same thing:

Select Q1 and Q2 to handle not less than 120% of the expected current and not less than 120% of B+.

Select R2 and R4 as not less than (120% of B+ voltage divided by 0.8 Amps.)

Select R1 and R2 as not less than (120% of "Turn Signal Active" voltage divided by 0.2 Amps.)

 

Disregard this post