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Surplus Science Equipment
This section lists our latest items that are surplus to our requirements. Some items are new and unused, some have been custom made and are unused. Others may be items we have used and do not need anymore. All items are tested and working unless described otherwise.
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Electronics & Robotics Items


Zener Diode - 15V 5W
Zener Diode - 15V 5W

Zener Diode - 15V 5W

1N5352B
This 15V zener diode is great for protecting circuits against voltage spikes.

Nominal Voltage: 15V
Impedance: 2.5R
IZ: 75mA
Stock Level: 54
Item Price: £0.34



Ultra Fast Diode - 600V 30A
Ultra Fast Diode - 600V 30A

Ultra Fast Diode - 600V 30A

FFPF30U60STU
Ultra fast diode in a TO-220ACFP isolated package. Great for use as a free-wheel diode.

VRRM - 600V
IF - 30A
IFSM - 180A
VF Max - 2.3V
Max Recovery time - 90ns
Stock Level: 4
Item Price: £0.71



Voltage Regulator 12V
Voltage Regulator 12V

Voltage Regulator 12V

L7812CV
12V regulator in a TO-220 package. It has built in current limiting and thermal shutdown for protection.

Output Voltage: 12V
Output Currnet: 1.5A
Max input voltage: 35V
Stock Level: 16
Item Price: £0.55



Timing Capacitors
10pF Timing Capacitor

10pF Timing Capacitor

Tiny Capacitors ideal for use as timing capacitors in circuits like our Pulse Generators or Resonant Signal Generator.

These small capacitors use a COG dielectric for compactness and stability which makes them great in timing applications. They also make ideal decoupling capacitors.

The range of capacitor values here when used with the circuits mentioned above can be used for creating signals from 0.5 Hz to 2 MHz.
Stock Level: 19
Select an option from below to display information above
10pF Timing Capacitor - £0.24
100pF Timing Capacitor - £0.24
470pF Timing Capacitor - £0.24
1nF Timing Capacitor - £0.24
10nF Timing Capacitor - £0.24
47nF Timing Capacitor - £0.24
220nF Timing Capacitor - £0.34
1uF Timing Capacitor - £0.99
Item Price: £0.24



MC33204PG Quad Comparator
MC33204PG Quad Comparator

MC33204PG Quad Comparator

Quad Low voltage rail to rail operational amplifiers
2.2MHz
Stock Level: 3
Item Price: £1.74



IC Sockets
DIP14 IC Socket

DIP14 IC Socket

DIP/DIL IC socket - 14 Pn
SALE: was £0.20 Save £0.05
Stock Level: 16
Select an option from below to display information above
DIP14 IC Socket - £0.15
DIP16 IC Socket - £0.15
Item Price: £0.15



1N5820TSC Schottky Diode
1N5820TSC  Schottky Diode

1N5820TSC Schottky Diode

1N5820TSC Schottky Diode 3A, 20V

Max. average forward current: 3A
Peak forward surge current: 80A
Max. DC reverse current: 2uA
Junction capacitance typ.: 250pF
Temperature range: -65 to +125C
Max Reverse Voltage: 20V
Max RMS Voltage: 14V
SALE: was £0.35 Save £0.10
Stock Level: 9
Item Price: £0.25



EMI Line Filter 20A 115-250V AC
EMI Line Filter 20A 115-250V AC

EMI Line Filter 20A 115-250V AC

This is a compact filter unit for preventing interference from Tesla Coils getting onto your mains line.

This is an essential feature for mains powered Tesla Coils as RF on the mains could damage anything else that may be plugged in.

Suitable for both US and European mains, 115-250V, 50/60Hz, 2x20 Amps.

New and Unused
Stock Level: 2
Item Price: £9.99



LM393 Comparator
LM393 Comparator

LM393 Comparator

These are dual independent precision voltage
comparators capable of single or split PSU operation. They allow a common mode range−to−ground level with single PSU operation.
DIP8 Package
New and Unused
Stock Level: 25
Item Price: £0.34



Shape Memory Alloy
Flexinol SMA wire 375 µm

Flexinol SMA wire 375 µm

1 metre length of Flexinol® Muscle wire®. 375 µm
This amazing material can be set into all sorts of shapes that can be 'remembered' by the atomic structure of the metal. By mildly heating the wire with an electric current it will return to any shape that you have allready set.
You can make robotic insect legs, self contracting or expanding springs, and much more.

Activation Temp: 70 Celcius
Resistance: 8 ohm/m
Rccomended current 2750mA
Stock Level: 0
Select an option from below to display information above
Flexinol SMA wire 375 µm - £4.99
Flexinol SMA wire 250 µm - £4.99
Flexinol SMA wire 150 µm - £4.99
Flexinol SMA wire 100 µm - £4.99
Flexinol SMA wire 50 µM - £4.99
Item Price: £4.99



555 Timer IC - DIP8
555 Timer IC - DIP8

555 Timer IC - DIP8

Very common timer oscillator IC used for generating squarewave signals and pulse width modulation.
These are used in several of our DIY Devices.
DIP8 Package
New and Unused
Stock Level: 24
Item Price: £0.29


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