Here’s a link with useful info about relay pinouts. I use standard 5-pin configuration for the signals: These pads are for soldering the base board and have the automotive relay form factor.Ībout this base board, schematic is really simple and is here: DSN_BASE_RELE_5P_V01. I also put a connector for microcontroller serial port, I use it on debug stage, to send ADC values and check the accuracy of the measurement.Īs you can see, on the top right of the board (TOP LAYER) there’re four pads, and there’s another pad in the middle right of the bottom layer. I also add a user led (D1) and two leds on series with the SSR input that lights when SSR is activate. Network resistors are configured to measure up to 15V, adjusting this voltage to maximum 4.096V input voltage on PIC using internal voltage reference (FVR). I add a MOSFET on the input stage to protect the device against polarity inversion when connect the battery. The schematic of the control board is here: DSN_CONTROL_BATERIA_V01. One for the electronics and another one for the base, where goes the faston connectors. Test with this board are also OK, so I design a PCB with all. Output ratings are 30V / 1A, so perfect to connect a external relay.
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