Arduino Power Supply v18.08: Difference between revisions
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Cac: [https://www.digikey.com/short/jfhbz2 CAP FILM 10UF 5% 400VDC RADIAL] | Cac: [https://www.digikey.com/short/jfhbz2 CAP FILM 10UF 5% 400VDC RADIAL] | ||
Cac discharge resistor: [https://www.digikey.com/short/qcz4jr | Cac discharge resistor: [https://www.digikey.com/short/qcz4jr UPL1.064 RES SMD 1M OHM 1% 1/4W 1206] | ||
Bridge diodes (x4): [https://www.digikey.com/short/q75w83 UPL4.004] | Bridge diodes (x4): [https://www.digikey.com/short/q75w83 UPL4.004 DIODE SCHOTTKY 40V 1A SOD123] | ||
Filter capacitor: [https://www.digikey.com/short/jfhvmt CAP ALUM 680UF 10% 10V RADIAL] | Filter capacitor: [https://www.digikey.com/short/jfhvmt CAP ALUM 680UF 10% 10V RADIAL] | ||
Revision as of 21:33, 18 August 2018
Design
Requirements
- Up to 300 mA supply (200 mA would likely be enough)
- 7-12 V DC output
- 120 V ac input
- Stable voltage reference of less than 5V
Research
Power requirements for Arduino Mega (usually <70 mA, 200 mA max) and RepRap Discount Smart Controller (40-100 mA?). 300 mA max to power control and display circuits.
Drawing Power from Grid without Transformer for *Low Power* Applications
Precise voltage measurement with the Arduino
High Efficiency 400W AC/DC Power Supply Reference Design
Calculations
Electronics Design
These designs are not guaranteed to be safe or functional. Use at your own risk.
Bill of Materials
Fuse: FUSE GLASS 1A 250VAC 5X20MM
Cac: CAP FILM 10UF 5% 400VDC RADIAL
Cac discharge resistor: UPL1.064 RES SMD 1M OHM 1% 1/4W 1206
Bridge diodes (x4): UPL4.004 DIODE SCHOTTKY 40V 1A SOD123
Filter capacitor: CAP ALUM 680UF 10% 10V RADIAL
Output zener: DIODE ZENER 9.1V 5W AXIAL
Voltage reference: IC VREF SHUNT 4.096V TO92-3
Voltage reference resistor: RES 5.6K OHM 5W 5% AXIAL
Total cost of components ~$10