If a poll was taken to determine what aspect of the hot rod hobby enthusiasts dislike the most, there’s a high likelihood that “diagnosing electrical issues/gremlins” would be the popular answer. An ...

Following on from our recent post about Pen testing for businesses, we wanted to talk a bit about the idea behind DIY pen testing. If you’re not familiar with the term – pen testing is short for ...

This circuit can be used to test up to three LEDs at once, connected in series. You can easily increase that number by using a higher supply voltage. If you do so, you should allow 2.7 V for each ...