After we had a timer in various forms. For example : the RC circuits or using IC generat and frequency divider. This time we try to run some microcontroller IC. The advantage of it is that we can assign different effects to it, and many other applications. So we recommend take a look at this Digital timer controller according to your needs or not. Special feature -Set the time from 0-99 seconds or 0-99 minutes. -There is EEprom-IC helps to keep the program, without the need for power supply. – Can be added or Delete times. At set the time. – Used with other devices such as vending machines, etc. – Show the times while the countdown set the time. How the circuit works As Figure 1 When 12 volts DC voltage into the point DC in 12V next wire is connected to a bridge circuit (D1-D4) which them is [...]

The microcontroller IC is a device that looks like a common IC. But inside it, the virtual a miniature computer. This device can be used instead of transistors and IC older those. 40 years ago Electronics fields used the transistors and ICs were equipment important the various circuit assemblie. but current dividend may become a memory. with the substitution of these microcontroller ICs.. The microcontrollers are also khow as Single computer chip, that smallest. Inside consists of central processing unit, Clock signal unit, input-output unit to connect external devices. Today, we can find microcontrollers have around us. They are used in appliances such as washing machines, microwave ovens, cell phones, printers, video recording, cameras, even in the car was also involved with the micro controller. Recommended circuit. This ICs used is the number MC68HC705K1 manufactured by Motorola. Which it is ICs that cheaper, suitable for amateurs to experimentation and use [...]

The digital time clock is circuit that electronic amateurs are most interested. And The clock ICs that most popular are LM8361, MM5387, Unfortunately these ICs looking for will be difficult. I highly recommend this clock circuits features to work for less than the original circuits. But there are advantages due to have output in Duplex LED display model, so reduce the number of wires between IC1 (LM8560) and LED display was 2 times more than the original. How it works In this circuits, the heart of the circuits are IC1 (LM8560), Which has output the 3 way are: 1. The output for drive display Duplex Model numbers (pin 1-14) 2. The output provide alarm signal at pin 16. 3. The output to control electrical appliances with automatic timer. Two R1, C1 together with was integrating circuit to Provide input to the clock signal 50 Hz input lock pin (pin 25) [...]

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 part timer.Which is set by R3 and C3 at a specified time period you want.Thus, when switch S1 (Start) IC1 work out a pulse signal generator via the output pin 3 of IC1.The VR1 function timer from 1-15 minutes. Then sent into the period to pin 2 of IC2 number [...]

This circuit is a basic function of the FET 2N3819, which acts as a switch. In the conduction and not conduction. It runs contrary to the transistor. The circuit can be used to delay the cycle is small. Such as delay, 9-volt light bulb, or motor delay to any DC 9 volts. When raising the power supply circuit FET Q1 is running. D and S stand by the legs of furniture to the Tong Q1 will flow together, current flows through R2, so the flow from the legs through the leg and S. D, and through R4 to ground. So no current flows into R3 to transistor Q2 does not conduct. Resulting in a voltage appearing at the output is 12 volt, but when I press the S1 switch current flows into the capacitor C1 fully. Then go to the legs G of the FET. Q1 stopped working. Therefore, the [...]

When has a thunderstorm. Electrical is off, or power surges the extreme, but sometimes we need to use the electrical appliances. And in sensitive electrical appliance damaged easily. Power surges a little. Might make it wastes. In particular surge. At you firstly turn on the switch. Should have the power to delay, gradually release it into these appliance. I would like to introduce the concept of a two ac delay circuits. Which both two circuit is designed in easily ideals for all people. Protection Surge with Delay the relay using ic 4011 This circuit can be used to delay other appliances connected to the output of the relay. After working set To prevent equipment damage from pressure. Surge. The IC number is 4011 Nand Gate CMOS .When switch S1 is current through R1. To charge at C1.This takes time to fully charge, and when a voltage input Pin 1 and [...]

This circuit will help facilitate in sleepy eliminating the need to get off or the radio. Etc., which can save energy costs down. When the switch S1 / 2 power input to the circuit C1 No.ua741. To a voltage comparison circuit. The pin 3 is the noninverting pin. for pin 2 to pin inverting. The pin 3 was divided voltage from R3 and R4. Used as a reference voltage for comparing the voltage at Pin 2 And the voltage drop across C2.The VR1, R1 and C2 is set to delay.To set up a long time. I add the R1 and C2.The switch S1 / 1 to determine the C2 discharge through R10 out.To start new work while off.The switch S1 / 1 and S1 / 2 are in the same But working conditions are opposite. Related Links 555 IC Timer control relay SwitchThis is easy Timer circuit projects. Control by [...]

This circuit is IC implementation schedule. No. 555 applied with IC number LM3905.(More circuits used LM3915) By the IC to the number 555 are the circuits Stable multi-vibrator. How often do produce it.This frequency is then forwarded to the scheduling with the integrated circuit number LM3905. When entering the power supply circuit IC1 No. 555. To be atable multivibrator circuit. Produce about 0.5 hertz frequency out.The R1, VR1, R2 and C1 determine the frequency.The output pin 3 will be out of a square wave LED1 will be lit.The signal is a negative split.and LED2 will be lit during a split positive signal.This will flash alternately throughout the duration of scheduled. IC2 is a timer IC.Includes VR2, R6 and C3.The setup time will be how long it can adjust the VR2.And while time is the output pin 7 of IC2 pin voltage will be 0 volt.And when it’s time to set [...]

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. 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 Q2, which work together to Darlington Compound. To have growth rates high to drive the LED2 light over time as C1 discharge all Q1 and Q2 stops LED2 is off if you want the timer circuit is longer. Then add the C1 and if you want a little time. to reduce it to C1. Related Links Electronic [...]

This be delay timer circuit model to be simple. It be the character delays to close electric all appliances. By fix the time about 5 minute. It can fine decorate the time. When see the circuit uses digital IC number CD4093 make good easy. And use transistor driver relay. It performs to edit the electricity gives with load or the electric appliances is all. When see our circuit uses electronic part that seek easy. May have no the problem about part. For LED1 use for display when feed power supply reach the circuit. It usability easily just press S1 for begin be usable. Buy Timer Switches control Related Links Minute Timer with alarm by IC555 This circuit uses a 555 IC timer number.This small, compact and portable. For the snooze alarm when some 10 or 15 minutes.It makes clear the brain is ready to continue to work.[...] 10 minute time [...]