I need a power supply for a 3D printer, my Kossel XL. I figured that a cheap LED supply would suffice, so long as I over rate it, and have a wide margin for safety, i.e. 30+ A.
So, how much is a SMPS in Bangkok? Cheaper than eBay or Amazon? Let’s find out…
Power supply. A 12V supply that can deliver at least 5A (without heated bed) or 15A (with heated bed). Be careful with cheap Chinese ones. They are cheap for a reason (safety!). We like to use computer power supplies, especially with modular cables to keep it tidy.
One problem with the LED supplies is that the mains connections are not covered.
I couldn’t find any dual 12/24 V supplies
12 V 35 A B$850
12 V 2 A B$100
12 V 30 A B$450
24 V 30 A B$1000
If you are not wishing to hack the ATX PSU internally, then following Using an ATX PSU for your RepRap project without modifying it (and without voiding its warranty), these are required:
- CPU Power Converter 4 Pin Male to 8 Pin Female Extension Power Cord FZ, AUS$1
- LK_ 24Pin Male to 24Pin Female PC PSU Power Adapter ATX Extension Cable Connec, £1.52
- 1 x 4 way screw terminal block
- 5 short lengths of heatshrink for colour coding:
- blsck – GND
- yellow – 12 V
- red – 5 V
- blue – standby 5VSB
- pink – PS_ON, power sense on, to remote control the ATX PSU from the RAMPS
- Molex Extension Cable 4 Pin 5.25 Male to Female IDE PSU Internal PC Power, 5 pieces, $1.99 (£1.58) cheapest on eBay and AliExpress
- 2pcs 4 Pin Molex Male to 3 port Molex IDE Female Power Adapter Cable, $2.49,
- 2pcs 4Pin ATX Molex 1 Male to 2 Female Extension IDE Power Supply Splitter CCYN, $1.16