Stamp resetting with Servo on AUXIO?
FlyingFishFinger
Posts: 461
I want to control a servo based on recieved DTMF. Both the recieving and the servo alone work, but when I put it together it doesn't. Here's the Setup:
The servo is on an AUXIO pin. When I recieve a call, the Stamp activates a relay and decodes the tones. When I recieve a certain one, I switch to AUXIO and give the servo a pulse, then I return to MAINIO and keep monitoring for tones. The idea is that when the same tone is still present, the servo gets triggered again and keeps getting pulsed till the tone stops. That's the theory.
Practically, however, as soon as the servo gets pulsed once, the relay (which is on MAINIO) turns off, interrupting the phone call. Then I have to start from scratch.
The interesting thing is, if I disconnect the servo keeping the same code, it returns and keeps monitoring the tones without problems...
Rafael
Edit: A LED instead of the servo with a simple HIGH command works...
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
You've got to play the game.
You can't win.
You can't break even, except on a very cold day.
It doesn't get that cold.
~Laws of Thermodynamics~
Post Edited (FlyingFishFinger) : 1/9/2007 12:35:28 AM GMT
The servo is on an AUXIO pin. When I recieve a call, the Stamp activates a relay and decodes the tones. When I recieve a certain one, I switch to AUXIO and give the servo a pulse, then I return to MAINIO and keep monitoring for tones. The idea is that when the same tone is still present, the servo gets triggered again and keeps getting pulsed till the tone stops. That's the theory.
Practically, however, as soon as the servo gets pulsed once, the relay (which is on MAINIO) turns off, interrupting the phone call. Then I have to start from scratch.
The interesting thing is, if I disconnect the servo keeping the same code, it returns and keeps monitoring the tones without problems...
Rafael
Edit: A LED instead of the servo with a simple HIGH command works...
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
You've got to play the game.
You can't win.
You can't break even, except on a very cold day.
It doesn't get that cold.
~Laws of Thermodynamics~
Post Edited (FlyingFishFinger) : 1/9/2007 12:35:28 AM GMT
Comments
Do you have a back-EMF diode on the relay? If not, you need one, or you may destroy your Stamp!
Regards,
Bruce Bates
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
<!--StartFragment -->
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Chris Savage
Parallax Tech Support
The relay does have a protection diode. I am driving it through a 2N2222 transistor on MAINIO. The servo is connected to the main power supply, G. Daubach's 5V switching regulator (LM2574), and a signal pin on AUXIO.
Rafael
Edit: I just realized that the build-in regulator on his board can only deliver 500ma...I will try swapping it for a higher power one and see what happens.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
You've got to play the game.
You can't win.
You can't break even, except on a very cold day.
It doesn't get that cold.
~Laws of Thermodynamics~
Post Edited (FlyingFishFinger) : 1/10/2007 3:22:36 AM GMT