A Christmas tree these days is unthinkable without a sparkling garland. There are a lot of them in the store, but you can do it yourself. Usually, small incandescent lamps for 2, 5 V, 3, 5 V and 6, 3 V are used for the manufacture of garlands. The easiest way to make a garland with a constant glow. They are made up of a large number of light bulbs connected in series. But on a holiday, I want the tree to sparkle, switch and delight with flashing lights.
The simplest Christmas tree garland can be made on starters from fluorescent lamps. In this case, there is no need for a relay.
The breaker will be a starter for lighting the lamps (a glass cylinder filled with an inert gas and having two electrodes). You can also use a dinistor (diode thyristor). If there is no dinistor, you can also use a triode thyristor (type KU201K, KU201L, KU202K, KU202N, KU208V, KU208G, TS 122-8, TS 122-9)
The garland itself consists of 10 lamps for a voltage of 26 V or 20 lamps for a voltage of 12.
Use a capacitor of the K50-6 type, resistors of the MLT type. Such a garland will work immediately after plugging into the network.
A small Christmas tree can be decorated with two alternately flashing garlands. For a large tree, use garlands with more powerful transistors, you will also need a power supply connected to the mains.
For the garland, you can still use ionic lamps of the MTX90 type or TX18A type. Lamps like MTX90, TX18A (for low-power devices).