Leon: Computer controlled power/current supply, multimeter
From DP
| Leon: Computer controlled power/current supply, multimeter | |
|---|---|
| Codename | Leon |
| Status | Design in progress |
| Development | development forum |
| ID # | {{{id}}} |
Contents |
Links
Goals
- 0-12V output
- 0-1.5A output
- Current sink/dummy load
- X channels ADC
- Computer controlled
- 12V+ DC supply
Parts
- MC34063EC from ST Microelectronics. Buck topology configuration. Package not yet chosen (DIP or SO-8 package).
- AD8293G80/160 from Analog Devices. Fixed gain of 80 or 160, factory calibrated. 1.88$ @ Digikey.
- DG508from Vishay. 8 analog inputs up to 44 V.
- PIC24H series microcontroller
Current measurement options considered
- LT1637
- ACS712 Low Current Sensor Breakout board
- AttoPilot Voltage and Current Sense Breakout (TI INA169 also INA139)
Concept drawings
Dia sketch program used for diagrams
Older designs
Power supply schematics
Constant load schematics
Design resources
App notes
- AN216-DCDC Converter Controller Using a PICmicro Microcontroller: For voltage supply and current supply schematics
- AN701-Switch Mode Battery Eliminator Based on a PIC16C72A: For buck converter calculations
- AN1114-Switch Mode Power Supply (SMPS) Topologies (Part I): SMPS topologies
- AN1207-Switch Mode Power Supply (SMPS) Topologies (Part II): SMPS calculations, very detailed
- AN1152-Achieving Higher ADC Resolution Using Oversampling: For increasing the ADC resolution
- AN954-Transformerless Power Supplies Resistive and Capacitive: For connecting the mains voltage
- App note: Variable resistor and temperature-indexed lookup table (LUT) compensate for regulator output
Chip notes
| ADCs by PIC family: |
| 24FJ family has 10+ 10bit @ 500ksps |
| 24H has 10+ 12bit @ 500ksps |
| 30F 12bit @200ksps, 10bit@1000ksps (1Msps) |
| 33F 12bit @ 500ksps, 10bit @ 1Msps (some with DAC, some with 1-2 16bit ADCs @ 100ksps) |
