Arduino Power Supply v18.08: Difference between revisions
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* 7-12 V DC output | * 7-12 V DC output | ||
* 120 V ac input | |||
* Stable voltage reference of less than 5V | * Stable voltage reference of less than 5V | ||
=Research= | =Research= | ||
Revision as of 03:24, 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: UPL4.009
Voltage reference: IC VREF SHUNT 4.096V TO92-3
Voltage reference resistor: 5.6 kOhm