Arduino Power Supply v18.08: Difference between revisions
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==Calculations== | ==Calculations== | ||
<html><img src=https://wiki.opensourceecology.org/images/2/2e/Ardpwrcalc.jpg width=500 height=300></html>[https://wiki.opensourceecology.org/images/2/2e/Ardpwrcalc.jpg] | <html><img src=https://wiki.opensourceecology.org/images/2/2e/Ardpwrcalc.jpg width=500 height=300></html>[https://wiki.opensourceecology.org/images/2/2e/Ardpwrcalc.jpg] | ||
==[https://ra3xdh.github.io/ QUCS-S] Simulation== | |||
[https://drive.google.com/drive/folders/1c9mJFP0FCcYF59Hx3DD-oRPK5-yKZYoQ?usp=sharing Simulation providing 9V at >250mA] | |||
==Electronics Design== | ==Electronics Design== | ||
Revision as of 05:48, 21 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
QUCS-S Simulation
Simulation providing 9V at >250mA
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 rectifier: RECT BRIDGE 2A 40V 4SMDIP or 4xUPL4.004 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