Invisible IR spotlight
Another old project that I recently dug up and want to complete is this REALLY powerful invisible infrared spotlight. I chose 940 nanometer infrared LEDs for the job as they are completely invisible to the naked eye. I should insert a WARNING here: If you are thinking of replicating this project, you need to be aware that it is uncertain if very powerful IR light like this can damage the retina in the eyes of humans and animals. Therefore,…