情境
A technician needs to align a satellite dish by watching a 10-LED bar graph that shows relative signal strength from the LNB.
這張圖裡有什麼
看懂背後的決策。
01
Use an LM3914 to drive ten LEDs in bar mode
02
Rectify RF input with a 1N4148 detector and RC filter
03
Power the meter from a 9V DC supply
Reuse this netlist when building or documenting a handheld satellite finder or signal strength meter with LED bar display.