Tuesday June 18, 2024

How to Use Solderless Breadboards

Step 3: Add the Resistor

The resistors important in this circuit cause I'm using a 6v power supply and need to bring the voltage down within spec of the LED to between 3.2-3.6v.  If the resistors not in the circuit we risk burning up the LED.

Connect the Resistor

Resistors don't have polarity, so can be oritented either way.  Notice how in the picture above we are connecting into the same row of 5 tie points that the LED's cathode (negative) is hooked into with one of the resistor's leads.  The other resistor lead is then connected to the ground rail (which is then connected to the power source since the entire rail is electrically connected).  That's how we tap into the 6v power supply.

Step 4: Add A Jumper Wire To Finish The Circuit

As it is right now, if you connected the batteries nothing would happen cause the positive power rail is not electrically connected at all to the middle row that the LED's anode lead is connected.  So we could either move the LED's anode to a power rail tie point, or connect a jumper wire from the middle column to the positive rail.

Connect Jumper Wire

The jumper wire (in purple) is now connecting the middle rows to the postive rail.  So we've completed the full circuit.  With these power rails, you can connect *anywhere* on the rail, but usually it's good to keep the jumper wires as short as possible and tie to the closest tie point on the rail to stay neat.

Next we'll test it out..

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Posted 03/22/12 4:44PM by Anonymous Techdoser
Now where do you buy them? I found an interesting place to buy them at nordevx.com Anybody know of some other places?
anonymous techdoser
Posted 01/22/12 2:44AM by Anonymous Techdoser
i did this and blowed an led!
Internal Connection of Breadboards
Posted 12/17/11 10:55AM by ashoksharmaz87
The article is really very good!
Another good link that I found about breadboard is http://www.engineersgarage.com/insight/how-breadboard-works
Short circuit?
Posted 10/16/11 4:34AM by Anonymous Techdoser
Hi, can anyone please explain why putting both the LED leads into holes which are electrically common would create a short circuit? I'd say there would just be no potential difference across the LED, hence it wouldn't light up. Am I wrong?
Posted 04/23/11 1:22PM by Anonymous Techdoser
hello can anyone please help me find out how to connect a switch with the board? Thanks.
attach a switch
Posted 02/23/11 8:11PM by Anonymous Techdoser
how can I connect a six pin right angle slide switch to this set up
Posted 01/05/11 12:09AM by Anonymous Techdoser
This is a clear explantion for anybody tryuing tono about solderlessbreadboard. Thanks a lot
bread board
Posted 10/28/10 8:56AM by ragraghu_k
very good for the learners , its climbing the ladder step by step , i think i can learn a lot
thank you very much
Posted 10/18/10 6:41PM by dvdove
good info,easily understood.
Diagram error
Posted 09/23/10 7:35PM by Anonymous Techdoser
In the diagram showing the LED connection to the battery, the resistor needs to be connected between the positive lead of the battery and the LED. The diagram is shown backwards, therefore, the voltage will be too much and probably blow the LED.
Posted 08/01/10 12:52AM by Anonymous Techdoser
Simple but Useful...:D
Posted 10/31/09 12:01PM by RikiKiki
You've made my day! Very useful!
Thanks for this great site
Posted 10/27/09 3:28PM by Voiseriaffona
Thanks for the information

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You have a good site www.techdose.com all very tastefully done!
Posted 10/02/09 6:27AM by rittachkas
You have a good site all very tastefully done! I really liked.
Sincerely Ritt.
Breadboards - How to...
Posted 09/26/09 10:36AM by Anonymous Techdoser
Superb!!! As an electronics novice I'm very thankful for your informative intro...Cheers