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1  Forum 2005-2010 (read only) / Interfacing / Re: Relay control to start and run my car on: May 16, 2010, 03:26:45 pm
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2  Forum 2005-2010 (read only) / Interfacing / Re: Relay control to start and run my car on: May 10, 2010, 10:40:18 pm
jackare,
I had resistors connected between Digital pins and base just forgot them in schematic
3  Forum 2005-2010 (read only) / Interfacing / Re: Relay control to start and run my car on: May 10, 2010, 08:20:26 am
they didn't smoke fast, it took like a hour. i had it working and installed in the car i was test driving it when they burned up.
here are the new relays i am using http://relays.tycoelectronics.com/datasheets/T9A_DS.pdf
using and 1N4003 diodes, 1k resistors, 2N2222A transistors.
can't do any tests till relays get here. smiley-sad

on the diode the white stripe is the direction of flow right?
4  Forum 2005-2010 (read only) / Interfacing / Re: Relay control to start and run my car on: May 08, 2010, 06:29:38 am
i tested the diodes as i took it apart to see what had gone wrong.
the diodes were still operational, but when i tested the transistors they were burned up. only one that still worked was the transistor that is on for 1000 ms to start the car, then off.
i believe the transistors are what failed.
5  Forum 2005-2010 (read only) / Interfacing / Re: Relay control to start and run my car on: May 07, 2010, 02:57:05 pm
thanks ill try that and let you know my results.
6  Forum 2005-2010 (read only) / Interfacing / Re: Relay control to start and run my car on: May 07, 2010, 02:02:49 pm
the part number for the transistors are 2N2222.

i have 4K7 resistors for output pins connected to base of the transistor.

and need new relays.

but the ones i had were nominal voltage = 12  DC resistance 10%(ohms) = 144   nominal current(mA) = 83
just forgot the resistors in the digram
7  Forum 2005-2010 (read only) / Interfacing / Relay control to start and run my car on: May 07, 2010, 11:26:41 am
I am using a arduino duemilanove to read a rfid tag and control 5 realys to start and keep the car running till i push the kill button.
every thing is working properly but the relays. i am running off the 12v constant behind the stereo in the car. it will run all five relays for the 1000 ms. after the starter relay turns off and the other four to stay on, after about 5 min the transtors start burning up.


Can anyone help??
smiley-sad
8  Forum 2005-2010 (read only) / News / Re: Single-page Arduino Cheat Sheet on: May 07, 2010, 11:26:19 am
very nice work wonders for newbies like me
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