Will a 555 timer accomplish this?

Need a circuit that would switch to ground, then un-ground, then ground. This is for a automotive use to "fake" the DVD receiver to allow me to use the screen for engine management gauge displays.

So, turn car to "on"....the circuit would delay 5 seconds, then ground, then un-ground, then ground again until car's ignition is cycled off.

What I cannot figure is the delay issue on start up. The 5 second delay is important because it is a built in timing sequence used to assume the time it takes to reach to pull the E brake up and down. I can manually do this with a simple on-off switch to ground and flip it up and down whenever I drive. But that is a bit hokie.

Stu

Two timers. The first one for the 5 second delay which would trigger the second one for the ground/unground/ground

Sceadwian said:

Two timers. The first one for the 5 second delay which would trigger the second one for the ground/unground/ground

Click to expand...

Reading other forums, they claim this TR7 module for around $20 does the trick and needs no building. It is also programmable to suit various needs. It was designed for a specific Brand, but it can be fitted for all by changing the paremeters.

Stu

What about use a pic? The cheaper I know is pic10f200. It cost some cents and have 4 I/O pins.

Actuly, PIC10f200 have one timer and internal clock, so you should have just a few external components.
the datasheet is: https://www.electro-tech-online.com/custompdfs/2011/07/41239a.pdf

there are some time calculators in assembly. If you google it you should find one.
this is a simple routine for 5 seconds delay.