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Yanick Rochon
Yanick Rochon
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When connecting a 4 channel relay to a Arduino Pro mini, there is a noticeable power drain from the board when relays are active. This is clearly visible as the 16x2 LCD dims. I remember reading that this could damage the Arduino, is this true?

In any case, since the entire project will be powered by a rechargeable 12V battery, I bought some buck converters to lower the voltage from 12V to 4.66V (this is what I identified the output to be from the Arduino, I even tried increasing it to 4.8V), so I can power the relay switch directly instead of going through the Arduino.

However, the relay does not power on and I have no idea why. Can someone help me understand? I'm new to this.

Connections specs

Parts

Edit

I found this answer but I do not know if it applies and, if it does, what changes I would need to make with my current connections.

When connecting a 4 channel relay to a Arduino Pro mini, there is a noticeable power drain from the board when relays are active. This is clearly visible as the 16x2 LCD dims. I remember reading that this could damage the Arduino, is this true?

In any case, since the entire project will be powered by a rechargeable 12V battery, I bought some buck converters to lower the voltage from 12V to 4.66V (this is what I identified the output to be from the Arduino, I even tried increasing it to 4.8V), so I can power the relay switch directly instead of going through the Arduino.

However, the relay does not power on and I have no idea why. Can someone help me understand? I'm new to this.

Connections specs

Parts

When connecting a 4 channel relay to a Arduino Pro mini, there is a noticeable power drain from the board when relays are active. This is clearly visible as the 16x2 LCD dims. I remember reading that this could damage the Arduino, is this true?

In any case, since the entire project will be powered by a rechargeable 12V battery, I bought some buck converters to lower the voltage from 12V to 4.66V (this is what I identified the output to be from the Arduino, I even tried increasing it to 4.8V), so I can power the relay switch directly instead of going through the Arduino.

However, the relay does not power on and I have no idea why. Can someone help me understand? I'm new to this.

Connections specs

Parts

Edit

I found this answer but I do not know if it applies and, if it does, what changes I would need to make with my current connections.

added 6 characters in body
Source Link
Yanick Rochon
Yanick Rochon
  • 95
  • 4

When connecting a 4 channel relay to a Arduino Pro mini, there is a noticeable power drain from the board when relays are active. This is clearly visible as the 16x2 LCD dims. I remember reading that this could damage the Arduino, is this true?

In any case, since the entire project will be powered by a rechargeable 12V battery, I bought some buck converters to lower the voltage from 12V to 4.66V (this is what I identified the output to be from the Arduino, I even tried increasing it to 4.8V), so I can power the relay switch directly instead of going through the Arduino.

However, the relay does not power on and I have no idea why. Can someone help me understand? I'm new to this.

ConnectionsConnections specs

Parts

When connecting a 4 channel relay to a Arduino Pro mini, there is a noticeable power drain from the board when relays are active. This is clearly visible as the 16x2 LCD dims. I remember reading that this could damage the Arduino, is this true?

In any case, since the entire project will be powered by a rechargeable 12V battery, I bought some buck converters to lower the voltage from 12V to 4.66V (this is what I identified the output to be from the Arduino, I even tried increasing it to 4.8V), so I can power the relay switch directly instead of going through the Arduino.

However, the relay does not power on and I have no idea why. Can someone help me understand? I'm new to this.

Connections

Parts

When connecting a 4 channel relay to a Arduino Pro mini, there is a noticeable power drain from the board when relays are active. This is clearly visible as the 16x2 LCD dims. I remember reading that this could damage the Arduino, is this true?

In any case, since the entire project will be powered by a rechargeable 12V battery, I bought some buck converters to lower the voltage from 12V to 4.66V (this is what I identified the output to be from the Arduino, I even tried increasing it to 4.8V), so I can power the relay switch directly instead of going through the Arduino.

However, the relay does not power on and I have no idea why. Can someone help me understand? I'm new to this.

Connections specs

Parts

added 2 characters in body
Source Link
Yanick Rochon
Yanick Rochon
  • 95
  • 4

When connecting a 4 channel relay to a Arduino Pro mini, there is a noticeable power drain from the board when relays are active. This is clearly visible as the 16x2 LCD dims. I remember reading that this could damage the Arduino, is this true?

In any case, since the entire project will be powered by a rechargeable 12V battery, I bought some buck converters to lower the voltage from 12V to 4.66V (this is what I identified the output to be from the Arduino, I even tried increasing it to 4.8V), so I can power the relay switch directly instead of going through the Arduino.

However, the relay does not power on and I have no idea why. Can someone help me understand? I'm new to this.

DesignConnections

Parts

When connecting a 4 channel relay to a Arduino Pro mini, there is a noticeable power drain from the board when relays are active. This is clearly visible as the 16x2 LCD dims. I remember reading that this could damage the Arduino, is this true?

In any case, since the entire project will be powered by a rechargeable 12V battery, I bought some buck converters to lower the voltage from 12V to 4.66V (this is what I identified the output to be from the Arduino, I even tried increasing it to 4.8V), so I can power the relay switch directly instead of going through the Arduino.

However, the relay does not power on and I have no idea why. Can someone help me understand? I'm new to this.

Design

Parts

When connecting a 4 channel relay to a Arduino Pro mini, there is a noticeable power drain from the board when relays are active. This is clearly visible as the 16x2 LCD dims. I remember reading that this could damage the Arduino, is this true?

In any case, since the entire project will be powered by a rechargeable 12V battery, I bought some buck converters to lower the voltage from 12V to 4.66V (this is what I identified the output to be from the Arduino, I even tried increasing it to 4.8V), so I can power the relay switch directly instead of going through the Arduino.

However, the relay does not power on and I have no idea why. Can someone help me understand? I'm new to this.

Connections

Parts

added 1010 characters in body; edited tags
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Yanick Rochon
Yanick Rochon
  • 95
  • 4
Changed images and added design
Source Link
Yanick Rochon
Yanick Rochon
  • 95
  • 4
Source Link
Yanick Rochon
Yanick Rochon
  • 95
  • 4