The Design Corner / Hobby Corner - Electronic Field Disturbance Monitor
designed by David A. Johnson, P.E.
Updated on:  Thursday, December 17, 2015 01:44 PM

  Electronic Field Disturbance Monitor:  Introduction - Monitor Design - Monitor Operation

Circuit Description:    Front-end Circuit Section - Alarm Threshold Detector 
Power Supply Voltage Regulators
Battery Voltage Monitor - Monitor Assembly
Material List                       

Hobby Corner:   Electronic Tips - Hobby Circuits - Electronic Field Disturbance Monitor - 100+ Construction Ideas


Material List
Electronic Field Disturbance Monitor - designed by David A. Johnson, P.E.

Page 1

ELECTRIC FIELD DISTURBANCE MONITOR MATERIALS LIST REV A 2/10/99

Item

Qty

Designator

Vendor

Description

Unit
Cost

Total
Cost

1

1

 

Digikey L104

Metal Box, 5D X 4H X 3W, LMB L104

8.14

8.14

2

1

 

 

Circuit board, 4" X 3.5"

 

 

3

1

BPR 1

Rad. Shk. 273-075

Piezo beeper

6.99

6.99

4

 

 

 

 

   

5

3

D1,D2,D5

Rad. Shk. 276-307

LED, red, T 1 3/4 style, high efficiency

2.00

6.00

6

3

 

Rad. Shk. 276-079

LED plastic lens, red, T 1 3/4 type

0.10

0.03

7

2

S1, S2

Rad. Shk. 275-624

Toggle switch, SPST

2.79

5.58

8

1

 

Rad. Shk. 274-424

Plastic knob for alarm level pot

0.75

0.75

9

2

 

Rad. Shk. 274-346

Phono (RCA) jack

0.50

1.00

10

1

 

Rad. Shk 274-661

Banana jack, earth ground

0.49

0.49

11

1

 

Rad. Shk 274-725

Insulated banana jack, antenna

0.49

0.49

12

1

 

Rad. Shk 270-1405

Telescoping whip antenna

3.99

3.99

13

4

 

Digikey J247

Metal standoff, 1" x 1/4" X 6-32

0.37

1.50

14

1

 

Rad. Shk. 270-326

9v battery holder

0.50

0.50

15

1

B1

Rad. Shk 23-553

9v battery

2.00

2.00

16

1

 

Rad. Shk. 64-2343

Foam adhesive pad, to secure battery holder

0.25

0.25

17

1

 

Digikey J149

Banana plug, soldered to whip antenna

1.00

1.00

18

1

 

Hobby Store

Tin plated steel, for shielded can around front end circuit

0.25

0.25

19

1

 

Rad. Shk. 270-325

9v battery connector

0.25

0.25

20

1

 

Hardware store

1/4 - 20 nut, glued to inside bottom of box

0.05

0.05

21

8

 

Hardware store

Screw, pan head, 6-32 x 1/4"

0.01

0.08

22

 

 

 

 

 

 

23

 

 

 

 

 

 

24

1

A1

Digikey LPC661IN

Operational Amplifier, low power single, National LPC661

1.72

1.72

25

1

A2

Digikey LPC662IN

Operational Amplifier, low power dual, National LPC662

2.35

2.35

26

2

A3, A4

Digikey LMC6762BIN

Voltage Comparator, low power, dual, National LMC6762

3.89

7.78

27

1

A5

Digikey ZMR500C

Voltage Regulator, low power, 5.0v, Zetex ZMR500C

1.41

1.41

28

1

A6

Digikey ZMR250C

Voltage Regulator, low power, 2.5v, Zetex ZMR250C

1.41

1.41

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