CD 4060 is the versatile Binary counter IC that can be used in Timer applications.When a resistor is connected to its pin 10 and a capacitor in its pin 9, it forms an oscillator that gives pulses to its pin 11.According to the timing cycle, each output goes high one by one. Output gives around 10 mA current and a voltage near to the supply voltage. Timer oscillates only when its Reset pin 12 is grounded. Continue reading “How to set CD 4060 IC as Timer”
Mosquito Repelling vaporizers are generally switched on throughout night to repel mosquitoes. This is not necessary because Mosquitoes become active during the evening hours for feeding. If it enters the home in the evening, it will bite in the night also if gets a chance. So the best method is to use the vaporizer in the evening hours. This circuit automatically turns on the vaporizer around 6 pm and keeps it on till 9 pm and after that, it switches of the vaporizer. This reduces the quantity of inhaling fumes and also increases the usage days of vaporizer. The circuit can be enclosed in the switch box itself.
Continue reading “Evening Timer for Mosquito Repellent”
You can use this Flashing LED light for Projects, Model vehicles, Toys etc. It blinks in a peculiar fashion with bursting flashes.
Continue reading “LED Strobe Light. Simple Design 26”
Confuse the burglars with this Mock alarm. It gives an impression that the Home is guarded with a highly sophisticated Security system. The Front panel of the unit fixed in the gate pillar gives that impression, but inside it, there nothing except a flashing circuit. The system automatically becomes active at night and stays on till morning. So no switch is needed. I have fixed it in my gate and many people asked me about its cost and I simply told it is a high cost one.
CD4024 is the CMOS Ripple- carry Binary counter / Divider IC used in Control counters, Frequency dividers, Timers and in Time delay circuits.CD 4024 is the 7-stage ripple counter with Master slave Flip-Flops. The counter advances with each negative going pulse in its input. A high going pulse in the reset pin will reset all the counters in zero state. Schmitt trigger action in the input pulse line permits unlimited rise and fall times. All the inputs and outputs are buffered.
Continue reading “CD 4024 Toggle Switch- Design Trick 2”
Some Microcontroller based Laboratory instruments such as Digital balance, pH Meter etc have rechargeable battery inside. This inbuilt battery should be properly charged for the error free operation of these instruments. If the instrument is not using (or charging) for long time, its inbuilt battery will be destroyed permanently. This timer circuit helps to keep the battery in top condition through automatic charging for 5 to 6 hours daily so that the instrument can be left unattended. The battery will be charged only during the day time.
Continue reading “Timer for Charger”
You can fix this circuit in the switch board that provides power to the loads such as Water heater, Electric Iron etc to remind you that the load is switched on. LED blinks indicating the load on status and the buzzer beeps every 30 minutes. This helps to prevent the wastage of energy usually happens when we forget to switch off these devices. This can be also used to remind, if remote lights such a terrace light is switched on unnoticed.
Continue reading “Timely Beeper”