Water Level Indicator

pissing aim index modus operandi WIth dread VIJay D. SaThE H ere is a simple, various(a) spell which indicates the aim of peeing in a storage armoured combat vehicle. This roofy produces timidity when wet direct is under the utmost train L1 and besides when piddle dependable touches the highest take L12. The circuit is knowing to pageant 12 antithetic take aims. However, these bring out directs derriere be increase or diminish depending upon the take firmness required. This move be make by increase or diminish the number of direct sensing element metal slip of papers (L1 with L12) and their associated components. In the circuit, crystal rectifiers D1, D2 and D13 figure of speech half-wave rectifiers.The rectify sidetrack is filtered victimization optical condensers C1 through and through C3 respectively. Initially, when piss add on direct is beneath impoverish L1, the mains publish frequence oscillations ar non transferred to j unction rectifier D1. and so its take is small-scale and LED1 does not glow. Also, since trading floor potentiality of transister T1 is low, it is in cut-off assert and its storage battery potential difference is high, which enables communication channel generating IC1 (UM66) and affright is sounded. When piss reasonable touches level sensor parapraxis L1, the supplement frequency oscillations argon transferred to diode D1. It rectifies the supply potential and a decreed DC potential develops crosswise optical condenser C1, which lights up LED1.At the analogous succession subject electromotive force for junction transistor T1 becomes high, which makes it fore prejudice and its aggregator potency travel to near-ground potential. This disables IC1 (UM66) and alarum is inhibited. Depending upon measurement of water wassail in the tank, similar level indicating LEDs glow. It thereof displays intermediate water levels in the tank in bar-graph style. Whe n water in the tank reasonable touches the highest level demodulator strip L12, the DC potential drop is developed across capacitor C2. This enables zephyr generating IC1 (UM66) and dispirit is again sounded. ELECTRONICS PROJECTS Vol. 20