How to fix a garland for a Christmas tree

The most common malfunction of a Christmas tree garland is the burning of one or more bulbs.

To repair the garland, it is necessary to find a defective one among a sufficiently large number of bulbs that make up it. Of course, you can check each bulb separately with a probe, but this is long and not rational.

You can quickly identify a blown bulb using a probe using the following well-known technique. Suppose the string contains 34 bulbs. We divide the garland into two parts, take, for example, an ohmmeter as a probe and dial each part. The section of the garland in which the device shows a break, that is, there is no deflection of the device arrow and contains a defective lamp. Then we divide the non-working part of the garland into two halves and find a new non-working section. Having found a non-working section, we divide it in half and again find a new non-working section, and so on several times until a defective lamp appears in the last non-working section.