DETAILED DESCRIPTION
This is a Step-Down switching regulator LT1766 and optional LM1117DT-ADJ.
PCB is compatibility with Arduino UNO rev. 3. If you want you power supplay Arduino you can select between voltage LT1766 and LM1117DT-ADJ.
Parameters project - DC/DC:
Input voltage (Vin) from 8 to 60 V.
Maximum current output (Iout max) 1.5 A.
In this configuration the output voltage 5 V. You can change voltage output be means of shift two resistors.
R2 → R1
R4 → R2
Hysteresis:
Voltage input:
- Voltage output OFF → ON, 0 → from ~13.5 V to 60 V,
- Voltage output ON → OFF, 0 → from 60 V to ~12 V.
Feedback resistor in this configuration - 387 k Ohm.
Parameters LDO (optional):
Post Regulator for Switching DC–DC Converter
Voltage input (Vin) - 20 V,
Voltage output (Vout, in this configuration - 3.3 V,
Current output (Iout) - 800 mA,
WARNING !!
MLCC capacitor and diode can be different (Maximum voltage or capacitors).
Connectors:
Power in:
- Power Jack x 1
- Terminal Block x 1 (2 Position 3.5 mm)
Power out:
DC/DC:
- Terminal Block x 2 (2 Position 3.5 mm)
LDO:
- Terminal Block x 1 (2 Position 3.5 mm)
Power supply selector Arduino Uno:
DC/DC or LDO
Select power supply Arduino → Vin
Measurement PCB:
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