A low-voltage electromagnet with
built-in electronic switching. When a magnet approaches the top face of the device at sufficient velocity the coil is switched on for a brief period (about 5 milliseconds).
Depending upon magnet polarity, either an attractive or repulsive force is applied to the magnet.
Can be used to build unusual electric motors, maintain a pendulum etc. For accurate pendulum driving please see
our SPC-3 below.
There is a YouTube video here
demonstrating the coil in action.
- Fully potted construction
- LED indicator
- Operating voltage 1.5V to 4.5V DC
- Dimensions 23mm diameter by 24mm overall height.
Negligible current consumption when not triggered, therefore a power switch is not required.
Single mounting hole in the flat base, tapped M3, also serves as the + connection.
Supplied with an 8x3 neodymium magnet, M3 base screw and a solder tag for the positive connection.
Looking for a solution to accurately drive a timekeeping pendulum?
The SPC-3 has an ironless core thus it does not interfere with pendulum swing.
It works down to near zero bob velocity thus very small swings are possible.
Features adjustable pulse power (pulse width) and wide operating voltage range
4 to 24 volts. It is capable of driving a large bob eg. for Foucault's demonstrations.
- Separate coil and P-Drive circuit
- Coil is fully potted and can be customised to fit the application.
- LED indicator
- multi-turn power adjuster
- Operating voltage 4 to 24 volts
- Drawing: SPC3 assy.pdf
- Instruction sheet: SPC3 and P-DriveR5.pdf
Materials kit for the "Tripulse" motor as shown in our demonstration video.
Everything needed to build the Tripulse except for an SPC-1. Order separately.
Kit contains: High density plastic material for the base, conical spring, two ball races, spindle, CNC routed rotor made from FR4 material, solder tags, brass and aluminium barstock, screws and three 8x1 neodymium magnets.
Tripulse materials kit. Price each £26.50
(includes UK postage)
Drawings and Build Notes for our "Tripulse" demonstration motor are available for download:
Drawings for our pendulum demonstration are available for download:
