About the article

EEDTS Pro Budget Booster

EEDTS Pro Budget Booster
For many people, the existing EEDTS booster, which has an output current capacity of 10 A, is perhaps a bit too much of a good thing. Although the existing booster is significantly superior to the ‘Budget Booster’ described here in many respects, the latter booster is more suitable for making the transition from analogue to digital control for your model railway. You can even use your old reliable train transformer (AC) from the analogue era to power the new booster!Note: although the Budget Booster can also be used with other controllers, since a symmetric signal can be connected to K1 and K2, this circuit is intended to be connected to the EEDTS Pro controller. The connectors are labelled to match the connectors on the EEDTS Pro controller board.
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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.

Extra info / Update
The type numbers BDY66C (T3) and BDV64C (T4) printed in the parts list and the circuit diagram are wrong and should be replaced by:T3 = BDV64T4 = BDV65The alternative type numbers BDW84 for T3 and BDW83 for T4 are correct.
Component list
R1 = 470?
R2 = 4k?7
R3,R4,R8,R9 = 10k?
R5 = 100k?
R6,R7 = 22k?
R10,R11 = 0?22 5W
C1,C2 = 4700µF 40V radial
C3 = 1µF 25V radial
C4 = 15nF
D1,D2,D3 = 1N4001
D4 = LED
D5-D12 = 1N4148
T1 = BC547
T2 = BC557
T3 = BDY66C
T4 = BDV64C
K1,K2 = 2-way PCB terminal block, lead pitch 7.5mm
S1 = on/off switch
RE1 = 12V, changeover contacts, e.g., Schrack V23037
PCB, order code 014098-
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