Wire-controlled music lantern circuit (1)

It is a simple wire-controlled Zhanle lantern circuit . The audio voltage from both ends of the speaker
is connected to terminals a and b through wires, and the RP sub-gland of the ShanDian device is added to the primary of the audio transformer T.
After the audio voltage is boosted by T, it is added from the secondary to the thyristor
VTH. The control electrode and the second anode are asked. When the audio voltage is higher. VTfl
is turned on, and the colorful light string E emits light; 3' is not enough to trigger VTH when Zhanle is paused or weak
, and VTH is turned off when the AC power crosses zero. From the r analysis, we know that
the brightness of the light string E fluctuates and flashes with the rhythm of the music played by the speaker. Adjust
the resistance of the potentiometer RI to adjust the line control sensitivity of the circuit.
    T uses a small input transformer for a transistor radio. The original 8n terminal
is connected to the potentiometer RP. Since this transformer not only transmits audio signals but also
plays a role in isolating 220V AC power, the transformer is required to have good inter-stage insulation. Readers who have the conditions are
advised to make their own. Homemade method: Use F, ?4 La core, wind 600 turns on the primary side (connected to the potentiometer end), and
wind 1200 turns on the secondary side. Both are wound with 40.3mm high-strength enameled wire. It requires good inter-stage insulation and immersion in varnish Dry
before use. VTH can use small plastic bidirectional thyristors such as MAC94A, I or MAC97A6, whose maximum
current is 1A. For example, use BCR: 3AM-S, 1 l. The L'226 sluice tube has a maximum driving current of up to 3A,
but an aluminum heat sink plate with sufficient area must be installed;