So I wired in the alarm system as in your pic cully but it didn't work.. I couldn't get hold of a 850uF cap but I don't think the value would have made it work for me.
When I clicked the disarm button the alarm would disarm but then arm again.
I think it was due to the added capacitor not discharging quickly enough.
After much experimentation I found the solution was to add a resistor in parallel to the cap. I also tried with numerous values and found the best charge/discharge time was achieved using a 470uF electrolytic cap and a 390ohm resistor (see pic).
As a bonus, I found that my alarm system was already wired into the indicators so they would flash when the system was armed/disarmed nicely and so I didn't need to find the alarm box to wire into it as I was previously trying to do.
The final problem with the system was the wireless range.. It was so good I could open the car from 2 streets away and I was worried I'd press the button by mistake one day it would open... (leaving the crisp packets and empty bottles in the back open to theft).. I just tied the aerial up in knots which worked.
Thanks again to cully for your posts which spurred me onto do this, great work!
When I clicked the disarm button the alarm would disarm but then arm again.
I think it was due to the added capacitor not discharging quickly enough.
After much experimentation I found the solution was to add a resistor in parallel to the cap. I also tried with numerous values and found the best charge/discharge time was achieved using a 470uF electrolytic cap and a 390ohm resistor (see pic).
As a bonus, I found that my alarm system was already wired into the indicators so they would flash when the system was armed/disarmed nicely and so I didn't need to find the alarm box to wire into it as I was previously trying to do.
The final problem with the system was the wireless range.. It was so good I could open the car from 2 streets away and I was worried I'd press the button by mistake one day it would open... (leaving the crisp packets and empty bottles in the back open to theft).. I just tied the aerial up in knots which worked.
Thanks again to cully for your posts which spurred me onto do this, great work!