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Reset MicroController Pendant Activation Relays

TuniMed

Jun 14, 2017
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Bonne Soiree.
* Projet: Couveuse d'oeuf complètement automatique
* Circuits: 16F876A, ULN2803, DHT11 (CAPTEUR DE TEMPERATURE ET D'HUMIDITE), Relais 12V (commande du système de chauffage, de ventilation, de rotation du plateau chaque heure et d'un moteur d'arrosage dans le cas de la diminution d ' Humidité).
Deux alimentation indépendante 12V 2A: Un pour la commande du PIC et LCD 2X16 a travers un 7805, L'autre pour commander les relais et le moteur d'arrosage.
* Problème: Reset de mon pic pendant l'activation des relais ou le fonctionnement du moteur d'arrosage malgré que les aliments son séparé ????
Si je peux vous envoyer les schémas isis, ares, programme, et image de ma circuit reel et Merci Bien.
Réellement Je Suis Besoin De Vos Aides Et Merci Bien A Tous
 

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Harald Kapp

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Salut TuniMed.

Please post in English, that's the language of this forum.
Also please post a schematic diagram of your circuit.

Even with separate power supplies there is a chance that noise couples via the common ground. We need to see the circuit and any measures you have taken to suppress noise from the activation of the relays or motor.
One thing is clear even from the photo of the pcb. there are no decoupling capacitors next to the ics. 100nF with very short leads (as short as possible) is a typical value.One for each IC.
There also seem to be lacking buffer capacitors next to the voltage regulator ics. The typical application circuit in the datasheet figure 7 shows 0.33µF at the input and 0.1µF at the output of the 7805. I see no such capacitor in your circuit.
Also a big electrolytic capacitor (>= 100µF) in the power supply for the motor and the relays is something I recommend. This will supply surge current at turn-on of these power hungry components.

Merci,
Harald
 

TuniMed

Jun 14, 2017
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THANKS A LOT SIR TO BE INTERESTED TO MY PROBLEM
THANKS SIR
THIS IS ALL DOCUMENT AND THE PROGRAM AND THANKS TO HELO ME SIR
 

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TuniMed

Jun 14, 2017
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AND THIS IS HOW THE TWO RELAIS RL3 AND RL5 WORK TO CHANGE MOTOR SENS ROTATION
 

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TuniMed

Jun 14, 2017
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THIS IS REGULATION CIRCUIT
 

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TuniMed

Jun 14, 2017
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I WOULD LIKE TO SAY THAT THE GROUND ARE NOT CUMMUN ALSO
ONE FOR PIC AND LCD ALIMENTATION
THE OTHER IS FOR THE RELAY AND THE GROUND IS CONNECTED TO THE PIN 9 OF THE ULN
 

davenn

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I WOULD LIKE TO SAY THAT THE GROUND ARE NOT CUMMUN ALSO
ONE FOR PIC AND LCD ALIMENTATION
THE OTHER IS FOR THE RELAY AND THE GROUND IS CONNECTED TO THE PIN 9 OF THE ULN

please turn your caps off
 

TuniMed

Jun 14, 2017
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Also i am not underestanding sir
* This is how my regulator is installed what can i add i use 330uF in the input and 33uF in the output with an 100nF

* About the decoplage capacitor where i put it btween Vcc And Gnd near the MicroControleur???( ceramique or electrolytique)

*About the 100uF it putted to evry relay or just in the power suply... I have a 2200uF can i put it

* The configuration of my MicroControlor about Boden or Pwrte there is some modification or i use the default configuration.

Thanks Sir
 

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Last edited:

Harald Kapp

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This is how my regulator is installed what can i add i use 330uF in the input and 33uF in the output with an 100nF
Looks good.
About the decoplage capacitor where i put it btween Vcc And Gnd near the MicroControleur???( ceramique or electrolytique)
Where: as near as possible. Use ceramic. You'd be hard pressed to find a 100nF electrolytic capacitor ;).
About the 100uF it putted to evry relay or just in the power suply... I have a 2200uF can i put it
Just in the power supply of the relays should be sufficient. 2200µF is very large but should work.
The configuration of my MicroControlor about Boden or Pwrte there is some modification or i use the default configuration.
I'm sorry, PICs are not my domain. I'm afraid I can't answer this.
 

TuniMed

Jun 14, 2017
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Looks good.

Where: as near as possible. Use ceramic. You'd be hard pressed to find a 100nF electrolytic capacitor ;).

Just in the power supply of the relays should be sufficient. 2200µF is very large but should work.

I'm sorry, PICs are not my domain. I'm afraid I can't answer this.
I Would like to say.. Thank You Veru Much Sir It Work Very Good... THANKS SIR
 
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