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LED’s Replace that Halogen Lamp

Economical alternative for the GU4

LED’s Replace that Halogen Lamp
There are numerous LED alternatives available these days for most types of incandescent and halogen lamps. But as an electronics hobbyist you can of course design and build something like this yourself, as this article illustrates. The LED lamp presented here can replace a GU4 model 10-watt halogen lamp, uses only one-tenth of the power and is barely bigger than the original.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor 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.

R1 = 0.620Ohm (SMD1206)
R2 = 1kOhm (SMD0603)
C1 = 2.2µF 25V (SMD3528)
C2 = 1µF 16V (SMD0603)
L1 = 100µH (e.g. LPS5030-104MLB)
D1a,b,c,d,D2 = PMEG4010CEJ (SOD323F)
D3 = SMAJ24A (SMA)
LED1 = Luxeon Rebel LED
U1 = MAX16820ATT+ (6 TDFN–EP)
PL1 = right angled pinheader (4 per lamp)
Lens: RS Components # 697-4288
Starry Night set: e.g. Conrad Electronics #’s 570590–89, 570591–89, 570592–89 or 570593–89
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