Radio with LM1820 IC

LM1820 Radio

• CA is 140 pF, 
• CB is 60 pF, 
• L1 has 110 and 5 turns for AM band, 
• L2 has 98 and 12 turns for oscillator, 
• T1 has 140 turns center tap and 2 turns, 
• T2 has 142 turns and 7 turns, 
• T3 has 142 turns center tap and 71 turns. 
• IF value is 455 kHz. 
• L3 has 3 turns on ferrite bead.

AM Radio with ZN415/ZN416

A ZN415E Radio Receiver - a amazing 12 transistors on just one nick, managing on 1.2-1.5 v.. One awesome element of this nick is that it pushes a conventional 2x32Ohm earphone immediately as one 64 Ohm cellphone. This indicates that it uses any inexpensive staying personal stereo, discman, mp3player earphone or earplug. It gets some 20-30 channels in the evening without any exterior aerial, just using the  ferrite rod. Note the attaches for the coils. I use this set to analyze the rings for my amazingly radio's as well.

Simple Audio Video Tarnsmiter

 
Component:
R1 1 kΩ                   C1 10 µF 16V      D1 1N4007
R2 3.3 kΩ               C2 220 µF 16V     D2 1N4007
R3 1 kΩ                   C3 100 nF
U1 Aurel TX AV UHF
R4 22 kΩ
C4 10 µF 16V
U2 LM741
R5 22 kΩ         C5 1 µF 16V
R6 680 kΩ       C6 10 µF 63V
C7 1 µF 16V
C8 10 µF 16V
C9 150 pf
C10 100 nF