Inverter DC current into AC current with IC 555 ( timer oscillator )
Power supply 5V with IC 7805 regulator
Notes.
- The bridge D1 can be also made by yourself by using four 1N 4007 diodes.
- If more than 400mA current is supposed to be taken from the circuit , fit a heat sink with to the 7805 IC
- Take note to input, output, and ground to IC, see the figure
- Voltage Regulator 7805
CDI (DC) for ignition system
FM Receiver with IC-TDA7000
capacitance of Cs should be reduced (to 15 pF, 10 pF etc.), or it should be short-circuited. You can also try compressing or stretching the L1 coil, etc. The setup of the oscillatory circuit is completed when with C=Cmax some station that operates on app. 88 MHz can be heard, and with C=Cmin the one that works on 108 MHz.
The input circuit setup (it is connected between pins 13 and 14), is performed by tuning the receiver to some mid-range station (about 98 MHz). Then, the best possible reception is searched, by changing capacitances C13 and C12 and inductance L2.
