击落模型定位器电路 (Downed Model Locato
时间：11-25
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directed toward the input signal lead and away from the negative side. Power in this circuit is minimal and you can use the smallest resistors you can get your hands on (get 1/8 watt if you can, but any power rating will work).
| 273-065 | peizo buzzer | $2.99 | ||
| 273-054 | electric buzzer | $2.59 | ||
| 276-1604 | 2N3906-type PNP transistors, 15 per | $2.29 | ||
| 276-2016 | 2N3904 NPN transistor | $0.59 | ||
| 276-1723 | LM555 timer IC | $1.29 | ||
| 272-1434 | 1uF tantalum capacitor | $0.59 | ||
| 271-xxx | 1/4 watt resistors (10k, 47k, 4.7k, 5 per) | $0.49 | ||
George Steiner's book, crammed with cool R/C radio info, can be had for $19.95 postage paid from the following:
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