Difference between revisions of "HYELEC MS8236"
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File:Hyelec ms8236 pcb top.jpg|<small>PCB, top</small> | |||
File:Hyelec ms8236 pcb bottom.jpg|<small>PCB, bottom</small> | |||
File:Hyelec ms8236 interface.jpg|<small>USB interface</small> | |||
</gallery> | </gallery> | ||
'''USB cable:''' | '''USB cable:''' | ||
Revision as of 17:47, 6 October 2015
 | |
| Status | planned |
|---|---|
| Counts | 6000 |
| IEC 61010-1 | CAT III (1000V) / CAT IV (600V) |
| Connectivity | USB |
| Measurements | voltage, resistance, diode, capacitance, frequency, current, hFE, temperature |
| Features | autorange, true-rms, data hold, delay hold, min/max, relative, bargraph, backlight |
| Website | hy-elec.com |
The HYELEC MS8236 is a 6000 counts, CAT III (1000V) / CAT IV (600V) handheld digital multimeter with USB connectivity.
See HYELEC MS8236/Info for more details (such as lsusb -v output) about the device.
Hardware
- 8-bit MCU with 4x40 LCD driver and 18-bit ADC: Hycontek HY11P14 (datasheet, user's guide)
- USB to serial IC: WCN CH340G (datasheet)
Photos
Multimeter:
PCB, top
PCB, bottom
USB interface
USB cable:
Standard USB to miniUSB.
Protocol
TODO.
The device's LCD segments are layed out as follows:
| G | ||
| C | F | |
| B | ||
| A | E | |
| D |
To the left of each LCD digit there is another segment which represents a dot / decimal point (DP).
An LCD segment is represented in the protocol as follows:
| Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
|---|---|---|---|---|---|---|---|
| DP | A | B | C | D | E | F | G |
Example: In the protocol a byte of 0x3F (0 0111111) represents the digit 9 on the LCD, where the decimal point is not displayed (bit 7 is not set). All other bits except for bit 6 (segment A, see above) are set, i.e. the respective LCD segments are displayed.