Question regarding IR Signal Rcvr/Transmitter

There is an Article on see following:

This article is great and while there is a schematic included there is only a topside picture of the circuit with the components mounted. Is there anyplace I can go or someone that might have both top and bottom side pictures of the device so I can duplicate how they connected things?

Thank You in advance

Weclome to the Technical Forum. I honestly do not think there is any more on this one. This is something that Maker put together with very good information. I would say they provided everything they had for this post.

Its a shot in the dark but thought i would try…Im soldering what I have onto the board now and will fudge together the other side… Thanks for responding!

Hello Brian,

Welcome to the world of electronics. I’m very glad to see that you are attempting to build a circuit using perfboard.

You are correct that the “one hole” pads are a bit difficult as you cannot see what is on the other side. May I recommend you use a “5-hole” pad such as this:

This particular board has the same layout as a breadboard allowing you to quickly transfer a working breadboard circuit to a more permanent soldered PCB. You may find this video useful to explain the distinction:

Best Wishes.


P.S. Don’t get frustrated if you make a mistake or two. That’s how we learn. Over the years I’ve made thousands of little mistakes all in the process of pushing myself to improve my skills.

I have it all assembled and working but damn what a mess if I could find a place to make a pcb just for this build it would be much better…perhaps you know of a place that will make a custom pcb?

Excellent Brian!

As for custom PCB’s, you can design your own. One popular PCB editor is Eagle. The following videos will guide you through the process:

Once you have a completed PCB you can send the design files to a PCB house using resources such as:

I’ll tell you now, there is a learning curve, but it’s well worth the time.

Best Wishes,


I spoke to soon i guess. While the article is great aside from not being very exact on showing how they wired things up top and bottom, I got it all assembled and while it receives data via lirc fine. However when I got to send I can see the LED transmitting (flashing) using the camera on my smart phone but it fails to turn my TV on or off. I downloaded a prebuilt conf. file for my remote and it doesnt work. Digging deeper into the problems i seen 1 thing it could be and have ordered a different IR LED to “hopefully” fix it. The IR Sensor is mainly suitable for receiving IR signals ( which I can receive just fine) at around the 950 nm wavelength. The IR LED is built to transmit at 880nm which isnt high on the receive band of the receiver. I feel if your building a IR Sensor thats peaked for around 950nm then the IR LED you should be using should also be around 950nm ?? Ive ordered a replacement IR LED and when it gets in ill either prove or disprove this theory. I also ordered a Raspberry Pi IR Shield to play with and see if I can get that working.

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Keep us posted bfpa40, and what you find out.

Thank you, Brian.

I wish you every success.

On a personal note, this struggle is one of the reasons I love working with electrons and mechanical devices. I empathize with you as there are so many uncertainties and decisions to be made. However, the reward comes with perseverance. You will be very happy and proud of your accomplishments when the project is working.

Best Wishes,


P.S. We don’t win them all. Don’t be discouraged by failure. It took me a long time to understand that failure is just another opportunity to learn. Believe you, me, I’ve had plenty of failures. You could say I am where I am today because of all those learning opportunities. Keep trying with a variety of projects.