Csongor Varga
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Description
Input Selector
I am using this board to pre-select power supply for me garden layout. I primarily use Marklin Digital, but sometimes I also have guest trains running on DC power, also external digital station. One of the 5 inputs will be reouted to the output connection. I have created this board so safely switch up to 10A power to the rails. The rotary selector switches I was able to find in the shops were all rated just for 1-2A.
Please note
- I run this board from 12V, but if you pick different relays you can use lower voltage as well. In that case you need to check the resistors
- There is no polarity protection on the supply input terminal, please double check your connections
- In the schematics, I included 2.2K resistor for the LED, but actually for the LED I picked (random LED from my parts bin), I ended up using a 5K resistor.
BOM
- IC4017 decade counter IC, optional IC socket
- 6pcs 10k resistor
- 5pcs 5k resistor: you may need to pick different values depending on your LED type.
- 5pcs 5mm LED (I used a generic high power white LED)
- 5pcs 1N4004 diode
- 5pcs BD547 transistor
- 7pcs double 5.08mm pitch screw terminals
- Generic push button
- 100nF ceramic capacitor
- 5pcs AZ733W-2A-12DE (12V relay, switching current 10A)
Schematic and Layout
Oct 10,2021
1,634 views
Input Selector
2 Layers PCB 85.6 x 101.8 mm FR-4, 1.6 mm, 1, HASL with lead, Yellow Solder Mask, White silkscreen
DC Input Selector
1634
1
0
Published: Oct 10,2021
Download Gerber file 45
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- Petrichenko Sergey Vasil'evich Oct 13,2021
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