![]() ![]() LM358 is not a rail-to-rail operational amplifier and if you are experiencing problem vith voltage calibration try to replace it with preferably MCP6002 or similar,. ![]() 2008.10.24 Corrected swapped A0 and A2 address pins of EEPROM IC1 (thanks to Achira).Later firmware upgrades will use USB bootloader, so you will probably not need another programmer later. COM84, connect it to ICSP connecter at the PCB center. To load firmware for the first time you will need another programmer with ICSP plug, i.e. Hex file will be copied to application directory. Search for "PICkit 2 v2.55.01 Setup B.zip" or similar archive. Software and firmware is available at Microchip website.To get a printout suitable for PCB etching click View, Display/Hide layers and select (only) layers: Bottom, Pads, Vias, Dimension, Holes, centerDrill.Enter "ratsnest" in command line to generate ground plane. ![]() brd file ground plane probably will not be visible - you will see only cut-off polygon (dotted line). ![]()
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