AM radio receiver using FM IC chip Circuit Diagram
Simple Electronic Applications June 1st, 2012This AM receiver employs a TDA7000 single-chip FM receiver (U1) as the primary radio component, and an LM386 chip for low-voltage audio-power amplifier (U2) circuit. The receiving coils are hand-wound coils (L1 and L2), and a couple of additional components. This coils, in collaboration with the variable capacitor, is selected to match the AM frequency. To wind your won coil, L1 and L2 are 100 turns of #28 wire on toroidal cores (about 240 ?H each). At 30 turns, L1 is tapped . Here is the schematic diagram :
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