Voting resources, early voting, and poll worker information - VOTE. ... Adafruit is open and shipping.
0

Adafruit Vecter 5v
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Adafruit Vecter 5v

by Kudu_bob on Fri May 29, 2020 2:32 pm

Hi

I am new to all this and just getting into electronics and LEDs for model building as a relaxing hobby. Trouble is... I am getting my first frown and rubbing of forehead.

I have initially set up to test my Adafruit Buck Boost 5v on a breadboard. I get a LED light which I presume means power on. Trouble is... I can't get any LEDs to light up individually or in series. I am unsure what the problem is. I do have the correct resistors on order based on my calculations but thought I would test it anyway.

I am using a 4 x AA battery pack

Any help would be much appreciated.

Thanks

Kudu_bob

Kudu_bob
 
Posts: 4
Joined: Fri May 29, 2020 1:34 pm

Re: Adafruit Vecter 5v

by adafruit_support_bill on Fri May 29, 2020 2:49 pm

Check the output of the Verter to make sure you have 5v.
Make sure that you have your LEDs wired correctly (Anode = positive, Cathode = negative)

If you post some photos of your setup we can take a look too.

adafruit_support_bill
 
Posts: 78774
Joined: Sat Feb 07, 2009 10:11 am

Re: Adafruit Vecter 5v

by Kudu_bob on Fri May 29, 2020 3:23 pm

Hi

Here is my email purchase link
Adafruit VERTER 5V USB Buck-Boost - 500mA from 3V-5V / 1000ma from 5V-12V [ADA2190]

Yes Anode positive long leg and Cathode negative short leg.

Please see photo attached

Thanks

Kudu_bob
Attachments
IMG_20200529_153935 (1) (1).jpg
IMG_20200529_153935 (1) (1).jpg (98.27 KiB) Viewed 56 times

Kudu_bob
 
Posts: 4
Joined: Fri May 29, 2020 1:34 pm

Re: Adafruit Vecter 5v

by adafruit_support_bill on Fri May 29, 2020 7:11 pm

A few issues there:

1: Your connections do not appear to be soldered.
2" There is no current limiting resistor in series with your LED.
3: There is no connection from the cathode side of your LED to GND.

adafruit_support_bill
 
Posts: 78774
Joined: Sat Feb 07, 2009 10:11 am

Re: Adafruit Vecter 5v

by Kudu_bob on Sun May 31, 2020 1:20 pm

Hi

Thanks for the help.
Got it working now my resistors have arrived.
Trouble is...
Using a 33 ohms resistors does not seem to work according to my calculations with two x 2.2 volt 20 amp red LEDs?

According to my calculations
R is Vs - Vf / I

R is 5 - (2.2 + 2.2) / 0.02 = 30 ohms

Please see photo

Thanks

Kudu_bob
Attachments
IMG_20200531_174310 (1).jpg
IMG_20200531_174310 (1).jpg (143.14 KiB) Viewed 51 times

Kudu_bob
 
Posts: 4
Joined: Fri May 29, 2020 1:34 pm

Re: Adafruit Vecter 5v

by adafruit_support_bill on Sun May 31, 2020 1:45 pm

On a breadboard, the 5 holes in each numbered row are all connected together. So the LED that is plugged into the 'g' and 'i' columns of row 23 has both anode and cathode connected together.

adafruit_support_bill
 
Posts: 78774
Joined: Sat Feb 07, 2009 10:11 am

Re: Adafruit Vecter 5v

by Kudu_bob on Tue Jun 02, 2020 10:24 am

That's great. Worked it out now and works fine.
Very much appreciated.

Cheers

Kudu_bob

Kudu_bob
 
Posts: 4
Joined: Fri May 29, 2020 1:34 pm

Please be positive and constructive with your questions and comments.