Tamil Nadu HSE Second Year Basic Electronics Engineering case studies
Tamil Nadu HSE Second Year Basic Electronics Engineering · Put your knowledge to work in context.
Basic Electronics Engineering is the vocational-stream elective offered at the Higher Secondary second year (+2 / Class XII) level under the Tamil Nadu State Board, examined by the Directorate of Government Examinations, Tamil Nadu. It suits students who have chosen the vocational group and want a practical, technician-level grounding in electronics rather than a purely theoretical physics route. The Tamil Nadu HSE Second Year Basic Electronics Engineering case studies are 5 cases and about 4,327 words.
1Shunt-Regulated 12 V Supply That Dies at No Load
A student assembles a 12 V, 100 mA regulated supply for a small project. The transformer is rated 230 V/12 V–0–12 V at 500 mA and feeds a bridge of four 1N4007 diodes; the filter capacitor is 470 µF/25 V.
867 words, about 4 min2Common-Emitter Stage That Clips Despite a 'Perfect' Q-Point
A common-emitter amplifier is built with VCC = 12 V, R1 = 47 kΩ, R2 = 10 kΩ, RC = 2.2 kΩ and RE = 1 kΩ, with RE bypassed by a 100 µF capacitor. The transistor data sheet gives hFE between 100 and 300 at IC = 1–2 mA, VBE ≈ 0.7 V and VA = 100 V.
776 words, about 4 min3Thermocouple Front End With 741: Offset and Common-Mode Errors
A final-year project uses a K-type thermocouple to measure a furnace over 0–1000 °C, giving about 0–40 mV, and needs 0–4 V at the ADC input, i.e. The first prototype uses a µA741 in a non-inverting configuration with Rf = 99 kΩ and R1 = 1 kΩ, powered from ±12 V, with a 1 m unshielded twisted pair from the thermocouple whose loop resistance is about 20 Ω.
879 words, about 4 min4FM Receiver Ghost Station and Harsh Audio
A student builds a single-conversion superheterodyne FM receiver for 88–108 MHz with an IF of 10.7 MHz and a 180 kHz ceramic IF filter. The local oscillator is designed to run on the high side of the incoming signal.
872 words, about 4 min58051 Furnace Controller: Relay Chatter, ADC Jitter and Resets
An 8051 system at 11.0592 MHz monitors a furnace with an LM35 sensor (10 mV/°C) through an ADC0804 and switches a 5 V relay through a BC547, with a 1N4007 across the coil. The relay contact drives a 1 kW heater through a contactor.
933 words, about 5 min