Arduino Power Supply v18.08: Difference between revisions
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Filter capacitor: 680 uF | Filter capacitor: 680 uF | ||
Output zener: [https://www.digikey.com/short/ | Output zener: [https://www.digikey.com/short/jfhbzz DIODE ZENER 9.1V 5W AXIAL] | ||
Voltage reference: [https://www.digikey.ca/short/jf40b9 IC VREF SHUNT 4.096V TO92-3] | Voltage reference: [https://www.digikey.ca/short/jf40b9 IC VREF SHUNT 4.096V TO92-3] | ||
Voltage reference resistor: 5.6 kOhm | Voltage reference resistor: 5.6 kOhm | ||
Revision as of 04:17, 18 August 2018
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
Electronics Design
These designs are not guaranteed to be safe or functional. Use at your own risk.
Bill of Materials
Cac = 10 uF
Cac discharge resistor: 1 MOhm
Bridge diodes (x4): UPL4.004
Filter capacitor: 680 uF
Output zener: DIODE ZENER 9.1V 5W AXIAL
Voltage reference: IC VREF SHUNT 4.096V TO92-3
Voltage reference resistor: 5.6 kOhm