Huge digital symbol circuit

Probe high current needle 120 needle head diameter is 3.0 threaded needle high current needle total length is
Huge digital symbol circuit
A simple power supply can drive any number of digital characters. The height of these characters is 212 inches, which can form a luminous house number. The "broadcast" brand is for amateur radio stations. The "bar is closed" sign is for the party. The room. Connect a 3.3K, 150V resistor to pin 13 of each digital word.


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