Pinball MAGNETISM circuits

Posted on Feb 6, 2014

Had noticed balls getting stuck in the ball trough, not loading into an upkicker or not sitting directly on trough ball microswitches/optos, causing the machine to think a ball was missing. My first thoughts were that the ball trough itself had become pitted . I also doubted the angle of the ball trough for a moment, as a slight adjustment allowed the balls to roll down normally. It then became apparent that

Click here to download the full size of the above Circuit.

the balls were magnetised and pulling together stronger than the force of gravity, or simply sticking to the metal ball trough. This did not happen for every game; only when certain balls landed in the trough next to other magnetised balls and also when they randomly lined up with magnetic polarity matching or opposing. This would cause the pinballs to not line up with the microswitches in the ball trough, as they were pushing the top ball back up the trough by about a centimetre. A magnetic field can be represented by lines of induction or flux lines/dipoles. These lines are invisible and are produced by magnetized material or by electrical currents. Magnetic flux measured in Gauss (G) It is named after Carl Friedrich Gauss, an early researcher in the field of magnetism. Magnetic objects are surrounded by a magnetic field. Some devices can detect this field and also give information about the direction/polarity of the field and even its strength. Show on magnetic flux paper/pole sensor foil gives a good visual indication of magnetised pinballs, although not very precise (see the picture & the video below). Polarity indicator test magnet only indicates polarity on pinballs that are quite heavily magnetised, i. e. ~30 gauss. Electronic indication from a gaussmeter gives an electronic reading that equates to an actual magnetic force in Gauss. Also indicates north & south polarity, which is difficult otherwise with a spherical...

Visit page

Leave Comment

characters left:

Related Circuits

Color sensor

Color sensor. Colour sensor is an interesting project for hobbyists. The cir- cuit can sense eight colours, i.e. blue, green and red (primary colours); magenta, yellow.

Dew sensor

Dew sensor. Dew (condensed moisture) ad- versely affects the normal per- formance of sensitive electronic devices. A low-cost circuit described here can be used to.

Audio Visual Ringer

Audio Visual Ringer. Many a times one needs an extra telephone ringer in an ad-joining room to know if there is an incoming call. For example, if the telephone is installed in.

Multipurpose Circuit for telephone

Multipurpose Circuit for telephone. This add-on device for telephones can be connected in parallel to the telephone instrument. The circuit provides audio-visual indication of on-hook,.

Off line Telephone tester

Off line Telephone tester. Here is a circuit of an off-line telephone tester which does not require any telephone line for testing a telephone instrument. The circuit is so simple that.

Telephone Headgear

Telephone Headgear. Acompact, inexpensive and low component count telecom head- set can be constructed using two readily available transistors and a few other electronic.

Telephone line based audio muting and light on circuit

Telephone line based audio muting and light on circuit. Very often when enjoying music or watching TV at high audio level, we may not be able to hear a telephone ring and thus miss an important...

Telephone Ringer using 556 dual timers

Telephone Ringer using 556 dual timers. Using modulated rectangular waves of different time periods, The circuit presented here produces ringing tones similar to those produced by a telephone. The.

New Circuits

Zero consumption Anti-theft High power Code Switch for E-Bike Batteries

This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
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....
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....
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....
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....
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,....
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....
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....
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.....

Create NOW your QR MENU for your Restaurant / Hotel / Bar / Caffe,

Comprehensive ordering/paying features. fully personalized to suit your Business.

Update Anytime! Easy and Simple!

Popular Circuits

Quad op amp generates 4 waveforms

A quad op amp can simultaneously generate four synchronized waveforms. The two comparators (Al...

Mosfet Buffer Amplifier Circuit

A MOSFET is used as a wideband buffer amplifier. T1 is wound on a toroid of approximately /f...

The Crystalizer

A classic amateur radio transmitter topology, the oscillator-amplifier (sometimes called master...

FSP107-2PS01 two-in-one power panel circuit analysis

Main matched LG26 one inch of screens of FSP107-2PS01 two-in-one electrical power package, direct...

Voltage-controlled cipher scheme of constant-current source of output high-power of bipolar

The output current range of the parameter current regulator is little, the current regulator is...

simple thermocouple amplifier

The OP07 is in a non inverting amplifier so as not load the mV of thermocouple, the zeners are to...

automatic dual output display circuit diagram

This circuit lights up ten bulbs sequentially, first in one direc- tion and then in the opposite...

LM2876 amplifier configuration

A single power amplifier circuit LM2876 crrL constituted. VTf external transistor to form the...