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This page will go over the test plans for the solar sense board and all the unit/integration tests for each subsystems subsystem implemented. It will be written out based on what to populate, then subsequently what to test so we populate only the subsystems we need to.
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As a side note so that things can be done in parallel: there will need to be firmware written or at least set up to read values in spi SPI from the nomuras Nomuras (which arshan Arshan has), and code to read from the thermsitorsthermistors, set the chip select lines for the spi SPI communication, control the relay and read voltage measurements from the ADCs. See schematics on my branch for details.
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The ideal diode design was taken from the typical applications in the LTC4359 Ideal Diode Controller Datasheet and was used in the ideal diodes purchased from Nomura for MS12. The implementation uses zener Zener diodes to clamp the reference of the input to 12V wrt Vss. The remainder of the 200V drops across R1, allowing the IC to stay at a LV reference. The purpose of this ideal diode is to implement diode features (near ideal) in which all current in a forward bias is conducted, while it is isolated in reverse bias.
To test the ideal diode, first, populate the following components in the order from first to last:
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The following is a list of the tests that need to be run and instructions to do so. Make sure YOU ARE ALWAYS CAREFUL AND CONFIDENT IN WHAT YOU’RE DOING, else seek help from a ee an EE lead:
General connectivity
You’ll want to test all the nets (refer to schematic diagram) at each node. Simply use a DMM on ohm mode and turn on the sound with the sound button (if the probes make noise when they touch each other its the right mode). This is just a quick test after population to make sure everything seems right.
The following tests will be conducted with 1 mppt connected to the 6th slot on the board (the slot on the right side) with a jumper going from the ground pin of the mppt to the “to battery terminal”.
Voltage drop across diode all cases
Measure the voltage difference across the diode for each of the following cases.
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