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1,5-Volts Medium Wave (MW) Radio

and now for something smaller.

1,5-Volts Medium Wave (MW) Radio
In this day and age when we’re surrounded by hi-tech we should leave it all behind and return to a very basic circuit. So stop thinking for a moment about faster and bigger — it’s the small things in life which are best!Since we’re continuously exposed to hi-tech gadgets, it’s easy to forget that we can still build interesting circuits with only a few components. There is nothing revolutionary about this circuit, but this shouldn’t deter the true electronics hobbyist. Apart from the educational aspect, it is satisfying to build a well-working circuit that uses only a few simple components.The circuit for a radio receiver is still a good example of this. A medium wave radio in particular becomes a very simple circuit when we go back to basics. It is also one of the most satisfying circuits to construct: you solder a few components onto a PCB, connect a battery and you’re greeted with music from the headphones. A very memorable experience!
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Component list
R1 = 100kOhm
R2 = 560Ohm
R3 = 33kOhm
P1 = 100Ohm preset H
C1 = 330pF (see text)
C2,C3 = 100nF
C4,C5 = 220nF
T1 = BC550
IC1 = MK484 (F-501), Conrad Electronics # 178535-88
Headphones 32Ohm (or more)
Experimenters' board type UPBS-1
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