[Multi-Colour] Automatic Night Lamp Circuit Diagram Using LDR And CD4017

Automatic Night Lamp Circuit Diagram Using LDR And CD4017 Components Required: Resistors (All 1/4W)R1 – 220ER2 – 1M(Preset)R3 – 33K LEDs:(3m/5mm/8mm)L1- WhiteL2- YellowL3 – GreenL4 – BlueL5 – Red Transistor:Q1 – BC547Q2 – 8050 or SL100 IC:U1 – CD4017 LDRMomentary Switch (Push to on)PS – Power source 12VGeneral purpose PCB Nіghtlіghtѕ are uѕеful to show thе gеnеrаl …

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Simple Battery Monitor Circuit Diagram Using NPN Transistor BC547 | Car Battery Monitor Circuit

Parts Used:Transistor : BC547 (Q1)Resistor (All are 1/4Watts)R1 – 10KR2 – 1KR3 – 1K Diode:D1 – 6V, 500mW ZenerD2 – LED (any color)Circuit Description:This circuit indicates a warning whenever the battery voltage falls below the level set by 10K pot. It can indicate that the battery is defective or needs charging if cranking drops …

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12V BATTERY LEVEL INDICATOR USING LM3914 | BATTERY LEVEL INDICATOR CIRCUIT DIAGRAM

Part Used:IC:U1 – LM3914 Resistors (All 1/4 watts)R1 – 4.7KR2 – 4.7K (preset to set upper limit)R3 – 1.2KR4 – 4.7K (preset to set lower limit – 10.5V) Circuit Description:The LM3914 acts as a LED driving voltmeter that has its basic maximum and minimum readings determined by the values of R1 and R2. When …

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12V Battery Charge/Discharge Indicator Using The Dual Op-Amp LM358 | 12v battery level indicator

Parts Used:Resistors: (1/4 Watts)R1 – 10KR2 – 10KR3 – 10K (preset)R4 – 10K (preset)R5 – 1.5KR6 – 1.5KR7 – 1KR8 – 1.5KR9 – 1.5KIC:U1 Dual Op-Amp LM358LEDs:RedGreenYellowFuse:100mA12V Battery General purpose PCBCircuit Description:This circuit monitors the 12V battery voltage. It provides an indication of normal supply voltage as well as low and …

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Water Level Indicator Circuit Project Using IC 555 With Motor Dry Run Protection Alarm

Components Required:Resistors (All 1/4W)R1 – R6 – 1MR7 – R12 – 220KR13 – R17 – 1KR18 – 3.3KR19 – 1MR20 – 100K (Preset)R21 – 1KR22 – 1.5K Capacitors:104(0.1uF) – Ceramic Disc – 1 no.100uF,25V – 1 no.470uF,40V – 1 no. IC:U1- CD4049 (with Base)U2-555(with Base) Diodes:D1 – LEDD2 & D3- IN4148DB1- W04 (Bridge …

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