Mini lantern CNC circuit

This article introduces a numerical control circuit that controls the selection function of TWH9104. The circuit uses a four-bit binary counter 74LS161. Its outputs QA, QB, and QC are connected to the ①, ②, and ③ pins of TWH9104 respectively. At the same time, it is connected to the 74LS48 decoder and drives the common The negative digital tube displays 8 numbers from "0 to 7". The functions corresponding to these 8 numbers are shown in the table below. Functions corresponding to the display words: 1: The light chases forward and then backwards 2: The light chases forward and backward, speed changes 3: Compound cycle 4: Light → dark → bright cycle 5: Light forward and backward wave dimming 6: Two adjacent channels at the same time Dimming 7, compound cycle 0, the lights are chasing again. Now click AN to select a function to control the colored lights. If you also want to add a voice control function to it, you can amplify the voice signal into a 5V pulsation control signal and input it to terminal B, and at the same time disconnect the synchronization signal obtained from the AC220 mains.