Maharashtra SSC Electronics and Hardware Pre-Voc/NSQF case studies
Maharashtra SSC Electronics and Hardware Pre-Voc/NSQF · Put your knowledge to work in context.
The Maharashtra SSC Electronics and Hardware Pre-Vocational/NSQF subject is a Class 10 elective offered under the Maharashtra State Board of Secondary and Higher Secondary Education (MSBSHSE). It gives students an early, practical footing in electronics and computer hardware alongside their regular SSC subjects, blending theory with hands-on skill work assessed internally. The Maharashtra SSC Electronics and Hardware Pre-Voc/NSQF case studies are 5 cases and about 3,531 words.
1Series Resistor or Buck Converter for a 12 V LED Sign
A workshop must power a 12 V, 1.5 A LED sign board from a spare 19 V, 3.42 A laptop-type SMPS adapter. The sign will sit 8 m from the adapter, and the only wire in stock is single-core copper of 0.5 mm² cross-section, whose resistance is about 0.034 Ω per metre.
755 words, about 4 min2Overheating a 7805 Regulator in a Small Power Supply
A trainee is building a fixed 5 V, 0.4 A supply for a sensor board. A 14 V AC transformer feeds a bridge rectifier and a 2200 µF reservoir capacitor, giving about 18 V DC at the intended load and nearly 19.5 V at light load.
682 words, about 3 min3Tombstoning and Rework on a 0805 LED Board
A small assembly unit produces 200 boards a week carrying 0805 LEDs, 0603 resistors and one QFN regulator, using SAC305 solder paste and a stainless stencil. After reflow, about 6 per cent of boards show LEDs standing on one end, and many joints look dull and grainy.
724 words, about 4 min4Intermittent APIPA, an IP Conflict and a DNS Failure in a School Lab
A school computer lab has 12 desktop PCs, one network printer and a Wi-Fi router that also acts as the DHCP server. The router's pool is 192.168.1.100 to 192.168.1.150; the printer is manually set to 192.168.1.55 and the router itself is 192.168.1.1.
661 words, about 3 min5Leaking Geyser, Tripping RCCB and a Request to Bypass It
A customer's 2 kW, 230 V storage water heater has started tripping the 30 mA RCCB in the distribution board about 20 minutes after switch-on, once the water is hot. The house wiring is about 12 years old.
709 words, about 4 min