Vacuum Tubes Valves
Musical & effects
Yagi Uda Antennas
Metal Detector Circuits
Liquid Sensing Circuits
Light Sensing Circuits
Voltage Detector Circuits
Air-Gas Detection Circuits
Human Sensing Circuits
RF & Radiation
Optical Sensing Circuits
Free Energy Circuits
AC to DC & DC to DC
Solar Cell Circuits
Micro Power Circuits
Switching Power Supplies
Light Laser LED
Digital to Analog
Analog to Digital
Data Bus Circuits
Voltage to Pulse
Current to Voltage
Frequency to Voltage
RF Converter Circuits
Sine to Square Wave
Voltage to Current
voltage to frequency
Period to Voltage
Video Wall circuits
TV Video Circuits
Motor Control Circuits
8051 / 8052
PCB CAD Software
Car bike Circuits
555 Timer Circuits
Remote Control Toy
H Bridge Circuit
DIY HV Variable Cap
DIY PMA alternator
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
Sensors & Detectors
Regulated Power Supply
4 Band Resistor
5 Band resistor
6 Band resistor
Meter Counter Circuits
Sequential Actuator for powering up to four devices
It is common that sometimes we need to power some devices σuccessively one after the other. This function forces us to handle a large number of switches, which are located where the access is difficult, especially in the case of informational devices and their pipelines. This sequential actuator ensures by itself the activation of one to four...
Thermal electromagnetic circuit long delay over-current release
DK-5A, 5D, SDb control box, all with a thermal electromagnetic overcurrent release, the circuit shown in Figure 6-80. Trip has overload and short circuit instantaneous action l
Conducting pipe control rechargeable delay circuit
Delay action, the instantaneous reset control circuit is divided into conducting pipe rechargeable delay circuit, tube cut-off control rechargeable delay circuit and a delay ci
Delay circuit diagram of energy-saving lamps
Delay saving lamps as shown is a sound and light control delay energy-saving lighting double. It can directly replace ordinary light switch without changing the original lighti
Delay starting a motor control circuit
Delay starting a motor control circuit
Conducting pipe control one rechargeable short delay circuit
Delay time is 0.5 ~ 3. 5s, adjustment potentiometer RP, can change the delay time.
Simple delay lamp circuit 1
FIG. 57 is a simple delay lamp circuit, which is connected with the lamp E uses two-wire connection, so security bars when installed, can be directly replaced by an ordinary wa
Bedside lamp with CD production delay
FIG inverter I, II and R1, R2, CI and SB constitute bistable trigger switch, each time the switch SB, the anti- phase II level to the output of a change. Composition R3, C2, VD
A simple bedside lamp delay circuit
FIG IC, ICR, Ri, R ,. AN composition and bistable contact cast Ge circuit. ICc. lc world where;, c2, Dj New Zealand into one-shot delay circuit meaning: [CL. ICrr W well-linkin
JEC-2 delay circuit diagram consisting of b
Delay application circuit is shown in Figure purposes JEC-2 consisting of two. When the input end is logic 0 to 1, the output also immediately end 1 ; but when the input end is
With a CD4013 Touch delay saving lamp production
Diode VD2 ~ VD5, SCR vs consisting touch switch main circuit, R5 and VDI constitute a power supply circuit, the output of about 12V DC voltage of about, for manifold A electric
Conducting pipe rechargeable long delay control circuit
Conducting pipe rechargeable long delay control circuit Adjustment potentiometer RP, can delay up to several tens of seconds.
Conducting pipe control rechargeable short delay circuit 2
Conducting pipe control rechargeable short delay circuit 2 Adjustment potentiometer RP, allows the delay time of several hundred milliseconds to several seconds.
Ultra-precise long time delay relay
Predictable time delays from as low as 0 milliseconds to over 3 minutes are obtainable without resorting to a large value electrolytic-type timing capacitor
Circuit (a) lets you delay the leading edge of a positive pulse while leaving the trailing edge almost unaffected. A positive input transition, inverted hy IC2, has no effect on IC1B. However, when the positive transition reaches IC1A, (delayed hy the adjustable network of R1, R2, and C1), it toggles both NOR gates, initiating the output...
A single monostable multivibrator delays a pulse train by a variable amount; nonetheless, this amount can be no less than the minimum allowed pulse width fwÂ· The exclusive-OR gate, IC1, generates a short pulse following every leading or falling edge of the input waveform. These pulses cause one-shot IC2 to produce a negative-going pulse with...
You can obtain well over 360Â° of phase delay by cascading two monostable multivibrators. In a typical configuration, a single monostable multivibrator is used to introduce delay in a pulse train; the multivibrator triggers on each incoming pulse, provided it resets in time for the next pulse. Yet even when it resets in time, the single...
The time delay, T, in seconds is: T = 1.1 x Cl x (Rl + R2). The resistances are in megohms and capacitances in microfarads. The sum of R1 and R2 should not be Jess than 1000 0 nor higher than 20 MO. Pressing S1 starts the timing cycle. A low-going pulse, instead of S1 can also be used to initiate the timing cycle. With the values shown and...
Power is applied to the circuit with the initiate switch open. The 25-JtF capacitor charges through the A14, or equivalent, diode and 2.2-KO resistor to full supply voltage. When the initiate switch is closed, the low side of the capacitor is suddenly raised to +12 V. This raises the diode side of the capacitor to approximately +24 V.
After the first cycle. the relay will normally be energized. When normally closed pushbutton 51 is activated, the SCR turns off, the relay is de-energized, and power is applied to the relaxation oscillator and the load. Mter a time delay varying from less than a second to approximately 2.5 minutes, as determined by the setting of the...
Delayed Alarm Circuit
The alarm/sensor circuit shown is built around two SCRs, a transistor, a 4049 hex inverter, and a few support components, all of which combine to form a closed-loop detection circuit with a delay feature. The delay feature allows you to enter a protected area and deactivate the circuit before the sounder goes off.Assuming that the protected...
Time-Delay Auto-Kill Switch Circuit
The automobile delayed kill switch is simple in concept. When you get out of your car, a secretly located pushbutton switch is pressed. Nothing apparently happens, but at the end of a predetermined time, a relay is pulled in and locked. When the relay is pulled in, contacts open, and the hot lead from the ignition to the coil and the hot wire...
Delayed Pulse Generator Circuit
Three 555 IC timers are used in this circuit to construct a simple delayed-pulse generator. IC1 acts as a waveform shaper to produce a rectangular waveform. IC2 produces a delaying pulse to trigger 103 on the trailing edge of the delaying pulse. Rl controls delay time and R2 controls pulse width.
Hour time-delay sampling circuit
The circuit lowers the effective peak current of the output PUT, Q2. By allowing the capacitor to charge with high gate voltage and periodically lowering gate voltage, when Ql fires, the timing resistor can be a value which supplies a much lower current than IP. The triggering requirement here is that minimum charge to trigger flow through the...
With a CD4011 dual-produced sound and light control delay lamp circuit
The main circuit uses a two-input NAND gate four digital integrated circuits, wherein the composition
With NE555 making push-button delay section lamp circuit
With NE555 making push-button delay section lamp circuit shown in Figure 3-5, the circuit from when base integrated circuits,
Touch light switch delay circuit
Is a good touch-down can delay the lamp, the circuit is characterized by: the static power consumption minimal; External switch terminal
A bedside lamp delay circuit
1C is a CD4 cries O. A (16) feet for the Vcc terminal. (8) feet for the ground. (12) feet for the reset terminal. (7) feet for Qt end, (3) feet to q. End (Sh, U). (Il) FW exter
A flash voice delay circuit
1C is SK - 2 integrated voice, when the object hit the sound is received in the body Xi ester cylinder MIC, the audio signal goes through a coupling obstacle to 1C. After ampli
0-60sec start-stop timer with 555
This timer is ideal for small aplications. Due to its simple structure, its usage and nevertheless its universal character, this mini timer is usable in the most current applications needing time intervals, from some seconds through approximately 60 minutes. By simple modifications it is possible to adjust the maximum time and the timing scale,...
555 IC using a delay circuit 2
555 IC using a delay circuit 2 It is actually a one-shot circuit. A delay time of 1. 1R3 C3. Typically R3 taken lkfl ~ lOMfl, C3-5000pF ~ lOOOpF, gave a delay of 5y s-15min.
555 IC using a delay circuit of the four b
555 IC using a delay circuit of the four b They are a jump from high to low transition of the delay circuit. That button is pressed SB snow, the output is high, after some dela
Frequency Meter Circuits
VU Meter Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
DIY HV Variable Capacitor
DIY PMA Alternator Plans
Digital Signal Integrity