Modify a LED chaser circuit into the easy timer
Basic Circuits
The a LED chaser is popular, so we will modify it into the easy and cheap timer. First,a appliance will works, while respective LEDs will flash, and until all LEDs go out. Then the appliance stop. How it works. In Figure 1 is the circuit. To begin with, to apply the cord and the appliance to outlet of the circuit. Secondly, briefly press the pushbutton switch-S1 and release slowly. Figure 1 the circuit diagram of the easy timer Suddenly, LED1 will shortly light up and LED2 will switched up instead, but LED1 will go out and will switch ON-OFF as …
Timer control 1-15 minutes by Triac 2N6075 and LM555-LM358
Controls & Timers
Most timer circuits. Often used with electrical transformers containing low as 9V and 12V, and use of electrical control relays.but the 1-15 minute timer circuit.It uses a triac instead of electrical control.This can be used with a 220V power house it is not connected to the transformer. Make smaller and easy to use. This circuit is divided into three parts: work special high-voltage level, the scheduling and control electrical appliances. When 220V power supply circuit R1, C1 and ZD1 a special level voltage 220V to rest 10V. The 10V input voltage is power supply to IC1 No. 555. which is …
Timer set for 30 minutes by transistor
Basic Circuits
This circuit is based on learning of the discharge and charge of the C, which can be used as a timer circuit and can be applied in the off electrical appliances. The application has also put relay instead of LED can be enabled. This circuit is working as video below: When you click the switch S1 will cause LED1 light told state ready to run S2 is a timer switch. On press switch S2 current will flow to the C1 charge fully. Then to discharge out through R2 to limit current flow to the bias for transistor Q1. Q1 and …
Simple Timer by CA3140 + NE555
Controls & Timers
This be the circuit sets the time to model is simple,at can fix the time had long ago and have tall good accuracy. By use pillar equipment be IC CA3140 for fix time mouth and NE555 perform sound electric bell origin. By we can fine time value done to a turn VR1 can fine since 10 second arrive at 3 hour. When the time expires will have an electric bell that a loudspeaker. For the equipment that should choose specially. Be C1 100uF 16V values should are a kind Tantalum. Because tall quality more Electrolytic. The moderately but if no …