- on Test & Measurement
- Published in issue 7/2011 on page 51
We’ve all been here: you operate the TV remote and nothing happens. Is the device broken or do you just need to renew the battery? Eyesight alone is no help for testing the operation of the infrared LED. Help is at hand, however, and this circuit will produce a useful gadget that can test all infrared (IR) remote controls simply and rapidly.