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This study aims to analyze digital literacy in thematic learning of elementary school students with the help of Flipbook media. To obtain data about digital literacy of elementary school students using questionnaires, observation sheets and in-depth interviews. Questionnaires were given to 23 grade VI elementary school students at SDN Trawas 1 who had operated flipbook media. For the validity and validity of the data conducted intensive interviews with students. Data analysis by reducing data in questionnaire tables, observation sheets and interviews. Then present it in narrative form to draw conclusions. The results of this study indicate that students' digital literacy in Thematic learning with the help of flipbook media is in the high category. Therefore thematic learning assisted by flipbook media needs to be developed and implemented so that elementary school students' digital literacy increases.

The development of transformerless 5 kW grid connected/offline bidirectional inverter simulation in PT. Len Industri is reported. The aim of transformerless is to reduce total cost and losses; making it more suitable for remote area application. The bidirectional inverter consist of two stage: bidirectional multiphase dcdc converter and single phase inverter. Double PI control loop is used in dcdc converter; controlling dc-link voltage in outer loop and ensuring balance of each phase current in inner loop. Single phase inverter also uses double loop control: unbalance dq to control inverter voltage in its outer loop and PI to control inductor current in its inner loop. The simulation run in PSIM and successfully conducted in stand alone (battery discharge), battery charge, and transition mode.

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