Maynuo M9812
Jump to navigation
Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
 | |
| Status | supported |
|---|---|
| Source code | maynuo-m97 |
| Channels | 1 |
| Voltage/current (CH1) | 300W / 0-30A / 0-150V |
| Connectivity | RS232 |
| Features | DC electronic load only |
| Website | maynuo.com |
The Maynuo M9812 is a programmable DC electronic load (300W 0~30A 0~150V) with serial connectivity (Modbus RTU).
See Maynuo M97 series for information common to all devices in this series.
Hardware
Digital control:
- 8-bit MCU with 64 KBytes Flash: Silicon Labs C8051F340 (datasheet)
- 64 Kbits I²C serial EEPROM: Microchip 24LC64 (datasheet)
Precision analog:
- 16 bits ADC: TI ADS8327 (datasheet)
- 16 bits DAC: BB DAC8831 (datasheet)
- Precision voltage reference (2.5 V): TI REF5025 (datasheet)
- Ultralow Offset Voltage Operational Amplifier: 4x OP07 (datasheet)
- Low Noise, Precision Operational Amplifier: 5x OP27 (datasheet)
Output stage:
- Power MOSFET: 8x IRFP250N (datasheet)
- General purpose JFET quad operational amplifiers: 2x ST TL084 (datasheet)
- General purpose JFET dual operational amplifiers: ST TL082 (datasheet)
Temperature control:
Power supply:
- 5 V Regulator: MC7805 (datasheet)
- 12 V Regulator: MC7812 (datasheet)
- -12 V Regulator: MC7912 (datasheet)
Miscelaneous:
- Dual 4-input NAND gate: NXP 74HC20D (datasheet)
- Power MOSFET: IRF540 (datasheet)
VFD controller + panel:
- VFD driver: Princeton Technology Corp. PT6314 (datasheet)
- 8-Bit Serial-In, Parallel-Out Shift Register: Faichild 74VHC164 (datasheet)
- Dual Amplifiers Operational: TI LM358 (datasheet)
Photos
Device, front
Device, front, booting
Device, front, powered
Device, back
Inside
Inside, from front
MCU, ADC, DAC, op-amps
MCU, ADC, DAC, op-amps
MCU, ADC, DAC, op-amps
Output stage
Output stage
Output stage
Current shunt
Power plug
Transformer
VFD controller
