Vacuum Tubes Valves
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AC to DC & DC to DC
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Data Bus Circuits
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RF Converter Circuits
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Video Wall circuits
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8051 / 8052
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555 Timer Circuits
Remote Control Toy
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DIY HV Variable Cap
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Digital Signal Integrity
Digital & Bipolars
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4 Band Resistor
5 Band resistor
6 Band resistor
Electronic Cricket Match Game
This electronic cricket is a present for Kids. This simple battery powered circuit can be used to play Cricket Match with your friends. Each LED in the circuit indicates various status of the cricket match like Sixer, Run out, Catch etc. The Circuit uses two ICs, one in the Astable mode and the second in the display driver mode. IC1 is wired as an
This project can be used for a quiz with up to 4 contestants (or teams). Each contestant has a trigger push-switch and LED. When a trigger switch is pressed it lights the corresponding LED, sounds the bleeper and prevents the other trigger switches from working - therefore showing which contestant was the first to press their switch. A reset push-
PIC 16F84 Tetris Video Game
12V simple CFL driver
Fun Game Circuits
Play this game alone or with your friends. The circuit comprises a timer IC, two decade counters and a display driver along with a 7-segment display. The game is simple. As stated above, it is a scoring game and the competitor who scores 100 points rapidly (in short steps) is the winner. For scoring, one has the option of pressing either s
H66T32BA CMOS LSI Designed For Use In Door Bell Telephone And Toy Applications
49MHz Toy RF Transmitter
This circuit was taken from a remote control tarantula transmitter operating at 49. 86MHz. The schematic can also be found at the FCC web site, if you look up the FCC ID. This operates under Part 15. 235 of the FCC rules and regulations Do you need help with an electronics design Daycounter provides contract electronics design services. Contact us
Electronically Designed Dice Game Circuit by LM555
The objective of the circuit is to build an electronic dice based on the functions of a 555 timer integrated circuit that operates in the astable mode. LM..
Infrared Toy Car Motor Controller
This add-on circuit enables remote switching on/off of battery-operated toy cars with the help of a TV/video remote control handset operating at 3040 kHz..
First Response Input Monitor Game Circuit
First Response Monitor, Input Selector, Game Circuit You can find first response using this circuit, because it helps many response monitor, games..
Games and fun stuff schematics
Pachisi Game Circuit
Pachisi game is designed for two persons. Each player has one figurine; the figurines are found in the early game on positions indicated by arrows. The goa..
Electronic Cricket Match Game
This electronic cricket is a present for Kids. This simple battery powered circuit can be used to play Cricket Match with your friends. Each LED in the cir..
Resurrecting Tennis for Two a video game from 1958
Tennis for Two presented a tennis court shown from the side on an oscilloscope screen, where handheld controllers allowed the two players to toss the ball to each other. Each controller had two controls: a button and a knob. With the button, you could hit the ball at any time of your choosing when it was on your side of the net, and with the...
Electronic Dice circuit
The IC1 is a 555 timer IC is connected for, Astable operation the clock pulses are fed to the IC2 via the 10K resistor. The IC2 is a 10 stage counter, output 6 (pin 5) is connected to RESET (pin 15), thus giving us a 6 stage counter, outputs 0 to 5. The 6 of the LEDs are connected as 3 pairs, thus requiring 4 different signals, these signals come
Digital Roulette with Display circuit
This circuit is a small digital ?roulette``. It is constituted by oscillator IC1, the counter IC2, the transistors Q1-7 that drive the display common cathode DSP1. The supply basically becomes from a battery 9V, but can become also from one power supply..
Electronic Dice circuit
The particular circuit is substantially a generator of accidental numbers, from 1 until the 6. The clue him we see in a line from led, that each one corresponds also in a number from the 1-6, if push and leave, the S1 (push button). This movement corresponds in a movement of dice. The led that it turned on will remain turned on for five until...
Game Show Indicator Lights (Whos First) circuit
The circuit turns on a light corresponding to the first of several buttons pressed in a "Who`s First" game. Three stages are shown but the circuit can be extended to include any number of buttons and lamps..
123 Game - All MCU-free circuit
This electronic game pits a human player against the ˜machine. The opponents use a common ˜game token and take turns moving along a path by one, two or three steps, and the winner is the first one to reach the goal exactly. Incredibly enough, this simple version of the ˜123 game can be built without a microcontroller, and it s almost impossible...
The circuits in Figure1 and Figure 2 exhibit certain advantages over the circuit shown in the Design Idea in EDN, "Circuit detects first event, " May 3, 2001, pg 89. The n-player first-event-detection circuit offers several improvements: It has fewer passive components. It
To make the unit easy to use, it was intended to be handheld and operate from a PP3 battery. But using a 9V battery meant that a voltage regulator was needed. The standard 3 pin regulator, the 7805, was fine except for one thing, the standby current of 5mA! Searching through Maplin I found the Holtek HT 1050 Low dropout regulator. This had a stand
Christmas card with inbuilt retro video game
You can download the schematic below. Have a look at it since you will need to match the circuit you are building, to this schematic. It is very like..
Arduino-Powered Jack-in-the-Box Toy
You`ve probably seen many of these toys. They`ve been around for years, from the talking tickle me elmo to the talking furby, like the one shown above. How do these devices do what they do when you perform an action such as tickle them or press a certain part of them How do they talk In this article, we will go over how you can build a circuit w
Interactive Toy Traffic Lights
This toy traffic signal uses a single low-cost hex Schmitt-trigger inverter IC (IC1a-IC1f) to directly drive three coloured LEDs (red, green and amber). At switch-on, the circuit lights the red signal for 30s, then shows green for 6s, then amber for 3s. It then repeats the sequence. Interaction is provided by pushbutton S1 which abbreviates the re
Modding a NES to run Unisystem VS arcade games
Play Games with Nixie Tubes
Nixie tubes were used for numeric - and sometimes alpha - displays back in the days before LEDs and LCDs. They were more light bulbs than tubes, but were encapsulated in evacuated glass shells like vacuum tubes and had round, multi-pin bases like tubes. Separate filaments were provided for each character. There were two basic varieties:...
Playing football game circuit diagram
Touching eight-sound five-flash dynamic toy circuit diagram
Touching eight-sound five-flash dynamic toy circuit diagram is shown in the diagram. It consists of HFC3018 module, and it can generate eight kinds ofdifferent voices: like step gunfire, aviation gunfire, game sight, telephone sight, bomb 1, bomb 2 sound, machine guns 1 sound and machine guns 2 sound, at the same time, itcan drive five small...
Ball Game Scoring Device (CD4027CD4055CD40192)Circuit
Ball game scoring device s circuit is as shown in the picture. It is used to record and display the performance of a ball game. The first Nixie tube has only two states, that is extinguishing or displaying 1; the next two Nixie tube can display ten states from 0 to 9. Therefore, the maximum scoring of the scoring machine can reach 199. The...
Game-scoring Display ScreenCircuit
Game-scoring display screen circuit diagram is shown as in the above picture. The circuit is composed of add/subtract scoring input circuit, add/subtract scoring circuit, counting - decoding display circuit and reset circuit..
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