I have been working on building a single 2.048v reference in order to check calibration of my meter and other equipment..I choose to use the Maxim Max6126 which is 2.048v and 0.02% tolerance with 5ppm Temperature Coefficient..The reason I chose to use this voltage because it will show full value on all my DMM and should work for most people ...I will be working the design and schematic in diptrace.. The design is not done or even built yet but I am working on finally details in order for me to buy the parts and test and it should be really nice IMO..The unit will powered with a single 18650 cell with a cheap ebay usb charger and battery protection circuit .. I was going to use a normal switch to turn the unit on but will go with a monetary switch circuit I think..My only problem is whether to use all smd parts or use smd and through hole ?? I was thinking all smd since I don't a drill press and I can get away with drilling a couple holes by hand but not set on the idea yet..
Any comments or suggestions ???
Hopefully I will be posting a full schematic..
Here is where I am pulling the circuit from and will be modding it to suit me
Chip schematic
Attached below
Any comments or suggestions ???
Hopefully I will be posting a full schematic..
Here is where I am pulling the circuit from and will be modding it to suit me
Chip schematic
Attached below
Attachments
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