原贴电路
元件清单:
1. u1 - cmos 555 timer
2. r1 - 4k7, 1/4w, 5%
3. r2 - 100k, 1/4w, 5%
4. r3,4 - 470r, 1/4w, 5%
5. c1 - 0.01uf, 50v ceramic
6. c2 - 10uf, 25v tantalum
7. c3 - 0.01uf, 50v ceramic
8. c4 - 0.001uf, 50v ceramic
9. d1,2 - pin diode, mpn3404
10. rfc1 - rf choke, 8 turns magnet wire space-wound over 1/4w carbon comp resistor (100k or greater).(注:按这个做法,估计约为1uh的电感,不知是否正确?请diy大师讨论一下。)
11. s1 - switch spst (toggle or slide)
12. misc. - pcb, 9volt battery, battery holder, stiff wire (for ant.), rg-58 coax and bnc connector.