CD4511 DIY Eight-way Digital Display Answering Machine Kit Training Electronic Production Skills Competition

8-way answering machine kit CD4511 PCB welding kit for electronic production technology competition The answering machine can display the number of priority answering machines based on the answering situation, and the buzzer sounds to indicate a successful answer. The answering machine is composed of answering, coding, priority, latching, digital display and circuit reset. The circuit of this preemptive answering device can perform 8-way preemptive answering at the same time. Press the key to sound the buzzer and the priority responder is displayed on the Nixie tube. After the answer is completed, press the key again, the display will not change unless you hold down the reset key. After resetting, the display will be cleared and you can continue to ask questions.