Vacuum Tubes Valves
Musical & effects
Yagi Uda Antennas
Metal Detector Circuits
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Human Sensing Circuits
RF & Radiation
Optical Sensing Circuits
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AC to DC & DC to DC
Solar Cell Circuits
Micro Power Circuits
Switching Power Supplies
Light Laser LED
Digital to Analog
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Data Bus Circuits
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RF Converter Circuits
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voltage to frequency
Period to Voltage
Video Wall circuits
TV Video Circuits
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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
Monitoring Voltages with Scaling Circuits
I am using the UCD90124/A, among other things, to monitor multiple voltages. Several of these are > 2. 5v so I have scaling circuits so as not to violate the 2. 5v max on the Mon inputs. My question is, do I enter the raw voltage values in Fusion for such things as over/under voltage fault/warning or do I use the scaled values Are there provisions
Klee Sequencer Circuit Theory of Operation
Clock and Load functions, with Load being the first function described. U5, CD4013, performs the load function by controlling whether the shift register ICs are in the parallel or serial mode. For 99. 99% of the time, the shift registers are in the serial mode. In the serial mode, each shift register will cycle bits through the register, left to...
Klee Sequencer Circuit Theory of Operation
Atari punk console + Baby sequencer 4017 IC
Doing this atari Sequencer and I think there`s an error in the drawing can not see. the atari is working but when I press the switch to ring the Sequencer, the sound disappears. please help. I don`t know if it will solve your problem, but your pin 13 at the 4017 is the INHIBIT pin and should be tied to ground instead of being highas is in the...
Descrete Multistage Light Sequencer
The drawing below illustrates a multistage light sequencer using descrete parts and no integrated circuits. The idea is not new and I hear a similar circuit was developed about 40 years ago using germanium transistors. The idea is to connect the lights so that as one turns off it causes the next to turn on, and so forth. This is accomplished with
I tried photo paper, telephone book paper, color pages of magazines, dextrin covered paper, the various catalogs of electronic supply companies. I tried different temperatures of the hot iron, higher & lower pressure. I tried different board cleaning methods, different chemicals, until I could cut the chemicals down to the etching agent &...
10 channel led sequencer
A sequencer used for music is a device that sequences musical events for predictable playback. For early electronic instruments these sequencers often take the form of a collection of switches that are cued in series and which trigger some other device like an VCA. The switches may also be used to control a variable voltage source which controls t
4 step 4017 sequencer
This weeks project is a simple 4-step sequencer based around a 4017 decade counter chip. The basic schematic is based on this circuit, using a 555 timer as a clock source: I changed it a bit by having the 4017 outputs drive transistors that switch current to the pitch pots (instead of turning on LEDS). Also, I triggered the chips RESET on step 4 i
baby 10 sequencer
4017 based sequencer
Below that is the clock section. The knob controls the internal oscillator`s speed, and that can be voltage-controlled via the `Speed In` input. Or, you can insert your own clock signal via the `Clock In`. This is slightly unusual, but I think having the option is useful. -Then you get to the 10 steps. Each has a CV control (+9V to 0V), LED step i
10 channel led sequencer schematic
The CGS89 is a sequencer designed for delivering pulsed or gated events, for rhythm and percussion, triggering other sequencers, or selecting stages in Programmers such as the Serge R15 PRG. It can be used as a replacement for the first generation Serge R10 SEQ Sequencer. The main function of the board is as a sequential pulse generator. When cloc
16 stage bi directional led sequencer
The bi-directional sequencer uses a 4 bit binary up/down counter (CD4516) and two ""1 of 8 line decoders"" (74HC138 or 74HCT138) to generate the popular ""Night Rider"" display. A Schmitt Trigger oscillator provides the clock signal for the counter and the rate can be adjusted with the 500K pot..
18 stage led sequencer
When power is applied, the 15K resistor and 10uF cap at pin 15 will reset the counters to the zero count where pin 3 is at +12 and all other outputs are at zero. The 2 diodes (1n914) and 15 resistor form a AND gate so the clock pulse will be passed to the right side counter when the sequence starts..
12 stage neon sequencer ne 2 ne 51
This circuit is similar to the LED clock using 12 neon indicator lamps instead of LEDs. It operates from 2 high capacity ni-cad cells (2.5 volts) which keep it going for a couple weeks. High voltage (70 volts) for the neon lamps is obtained from a small switching power supply using a 74HC14 Schmitt trigger squarewave oscillator, high voltage...
one of nine sequencer
This novel circuit uses a flashing LED as the clock input for a 4017 decade counter. Typical flashing LEDs (eg, DSE cat Z-4044) flash at about 2Hz so the outputs Q0-Q9 will cycle through at that rate. For example, Q0 will turn on for half a second, then Q1, then Q2 etc up to Q8 then it will start at Q0 again. Up to nine outputs can be used. If...
led sequencer chaser ne555 4017
Here is a circuit of a LED sequencer / chaser using CD 4017 and NE555 IC. CD 4017 is a CMOS counter IC consist of 16 pins. This IC gives 10 outputs according to the clock pulse it receives from the clock input, which is pin 14. The another IC used in this circuit is NE555 which is a timer IC. NE555 is a very famous IC and used in wide verity elect
Super Sequencer?® With Margining Control And Auxiliary ADC Inputs
The ADRF6702 TxMod is an IQ Modulator with integrated PLL and VCO The PLL Synthesizer uses a Fractional-N PLL to generate a 2*FLO input to the I-Q Modulator The PLL reference input is supported from 12MHz to 160MHz. The phase detector output controls a chargepump whose output is integrated in an off-chip loop-filter. The loop Filter output is then
PS10 Quad Power Sequencing Controller - Supertex Inc
The PS10 saves board space, improves accuracy, eliminates Optocouplers or level shifts and reduces overall component count by combining four Timers programmable input UV/ OV supervisors, a programmable POR, and four 90V open drain outputs. A high reliability, high voltage, junction isolated process allows the PS10 to be connected directly across t
PS10NG Quad Power Sequencing Controller
Ultra Low Voltage Detectors PT7M6101 PT7M6102 series are designed for over current detector. They provide excellent circuit reliability and low cost by eliminating external components. These devices assert an OVRI signal when the voltage at IN pin rises above the high threshold. After IN pin declines below the low threshold, OVRI signal is de-asse
LEDs or Lamps Sequencers
The purpose of this circuit was to create a ring in which LEDs or Lamps illuminate sequentially. Its main feature is a high versatility: you can build a loop containing any number of LEDs or Lamps, as each illuminating device has its own small circuit. The diagrams show three-stage circuits for simplicity: you can add an unlimited number of stages
16 Stage Bi-Directional LED Sequencer
The bi-directional sequencer uses a 4 bit binary up/down counter (CD4516) and two â€œ1 of 8 line decodersâ€œ74HC138 or 74HCT138) to generate the popular Nigh..
Sequencer type switch opener closer circuit
up down led sequencer
I have a 10 light LED bargraph, I want to make the LED`s light one after the other until all the LED`s are lit, and then have the circuit cycle back down until all the LED`s are off again. A simpler (analog) way is a LM3914 - Dot/Bar Display Driver operating in the bar mode. If you put a triangular ramp voltage at the input, the LEDs will light up
Light Sequencer 5 Channels 220V
This circuit controls five outputs 220V. Potentiometer change speed and a switch select effect (one direction or both directions). The circuit has a divider by 10 (4017), a transistor oscillator (2N2646), the power stage and power supply. Each pulse on pin 14 of 4017 advance to the next (the order is: 3, 2, 4, 7, 10, 1, 5, 6, 9, 11 - In that orde
Relay Sequencer Board
A relay sequencer is used in a radio transverter and is use to activate particular stages in order after short delay. This project describes how to build this sequencer. It has the following features. This stage is used to switch the output / input of the driving radio to the corresponding RX IF output or the TX IF input depending the current stat
Christmas Lights Sequencer Circuit using a 4017B
Christmas is coming and its that time of the year again when the electronics student or hobbyists thoughts turn to making a Christmas circuit for their home and especially one that flashes a few lights. There are many circuits and kits on the market that can flash any number of lights periodically, randomly or sequentially but one very versatile I
Yes, both of those transistor types will be suitable. Is the ""sn9304"" a 2N3904? That`s a common type. You`re going to have four LEDs on at a ..
The model 4017 integrated circuit is a CMOS counter with ten output terminals. One of these ten terminals will be in a "high" state at any given time, with all others being "low, " giving a "one-of-ten" output sequence. If low-to-high voltage pulses are applied to the "clock" (Clk) terminal of the 4017, it will increment its count, forcing the next
60 Light Sequencer using a Matrix
The circuit below illustrates using a 10x10 matrix to sequence up to 100 LEDs with just three ICs and 20 transistors. The two 4017 decade counters control the 10 rows and 10 columns so that one LED is selected depending on the output of the decade counters. For example, to expand the circuit to 60 LEDs for displaying minutes or seconds of a clock,
10 STEP SEQUENCER
This analog sequencer was designed with the idea of cooperative play in mind. It can be used as a standalone instrument, or linked together with other sequencers running on the same clock speed. Mark Kleback and I were working separately working on sequencers based on Nicholis Collin`s schematics in his Handmade Electronic Music. We were playing m
555 Timer Circuits
RC Model Toy Circuits
H Bridge 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