Divergence Meter Project


Parts Lists for IN-18 version (8-29-2015)

This page has parts and sources listed for components needed to build the IN-18 version of my Divergence Meter (a work in progress). Some of the parts are actual functioning electronics, while others are dummy components for mounting on top of the case. There is also a list of parts needed to build the case itself.


Part I Have For Sale:

The only part I have left for sale is the pre-programmed PIC processor chip (just because many people don't have the equipment needed to program the chip). I'm not a business... I'm just willing to help out my fellow fans by supplying some of this special part. I will do my best to respond and ship in a timely manner.

Pre-programmed processor chip PIC16F628A. Price: $3.00

Cost of shipping is extra:

I generally ship via Priority Mail in a USPS box.

I will ship to other countries, but you will need to tell me if you want your items sent by some slow cheap method, or by some faster more expensive method, and then I will look into the cost.

I will accept payment to my personal PAYPAL account:

Contact me via email at tomtitor@mindspring.com and let me know which of the above parts you want and your address. I'll send a return email with payment information (don't send payment using the tomtitor email address, since that is not my PAYPAL address).

These Web pages are the instructions for building the device. Also, if you have an questions, ask me via email: tomtitor@mindspring.com


The other parts you need to build the IN-18 version Divergence Meter are listed below, with sources indicated:


Actual Electronics

Quantity Description Part Number Source
1 Main Printed Circuit Board IN-18 version Ordered from ExpressPCB. I have the necessary files needed to order the boards if you want them.
1 Tube Printed Circuit Board IN-18 version

U3: PIC16F628A processor
(programmed with version 1.05 of the Divergence Meter software)


mouser.com $2.23

U1: LM7805 1A 5V regulator TO-220

(Also get a short machine screw and nut that fits the TO-220 mounting hole to hold it to the board. From hardware store.)

512-LM7805CT mouser.com $0.69
1 D1: 1N4007 512-1N4007 mouser.com $0.18
1 Fuse 0.8A 5mm x 20mm 504-BK/S500-800-R mouser.com $0.32
2 Fuse Holder Clips 534-3519 mouser.com $0.18 each
1 J2: DC Power Jack 2.5mm 806-KLDX-0202-B mouser.com $0.87
1 U4B: DS3232 Real Time Clock* 700-DS3232SN# mouser.com $9.15
1 C4B: 0.1uF Capacitor MLCC - SMT0805* 10-CGJ4J2X7R1H104K mouser.com $0.33
1 U2: 1364 High Voltage Power Supply 1364 HVPS-H tayloredge.com $13.95 (price includes shipping cost)
1 C2: 330uF Electrolytic Capacitor 75-515D337M025CC6AE3 mouser.com $0.46
3 U5, U6, U7: Supertex Serial to Parallel Converters 220V 32Ch Open Drain Outputs. Get the PQFP-44 package! 689-HV5622PG-G mouser.com $6.70 each
8 IN-18 Nixie Tubes (Soviet manufacture. No longer produced, but still available on eBay) I recommend getting tubes that are "New Old Stock", not used ones. Look for these on eBay. They can typically be found for around $50 each.
1 C1: 33uF Electrolytic Capacitor 75-517D336M025JA6AE3 mouser.com $0.33
4 C3, C7, C8, C9: 0.1uF Capacitor MLCC


mouser.com $0.26
6 R0*, R1, R2, R3, R4, R32: 10K Resistor 660-CF1/4C103J mouser.com $0.15 each
1 R31: 470K Resistor 660-CF1/4C474J mouser.com $0.15
8 R7, R8, R9, R10, R11, R12, R13, R14: 15K Resistors (current limiting resistors for nixie tubes. This value is different from that used with the IN-14 tube version) 271-15K-RC mouser.com $0.15 each
1 R18 (current limiting resistor for decimal point). I didn't know the resistance this should be to give the LED the brightness to match the tubes, so I made the board with the option to hold a trimmer pot instead of a fixed resistor. This way the resistance can be adjusted as desired (start at about 1K...NOT at zero K, or you'll fry the LED!) 652-3006P-1-502-LF mouser.com $2.08
1 For the LED that will go in front of one of the tubes to act as the decimal place, I used an ornage surface mount LED (mouser 630-HSMD-C150) soldered to wires (a bit tricky, but I was able to do it 3 out of 4 times I tried) 630-HSMD-C150 mouser.com $0.40 each (I bought extra in case I made soldering mistake)
1 R5: Trimmer Resistor 100K Sealed 6mm Square 12-turn 81-PV37W104C01B00 mouser.com $2.29

J1 (8 pins), J3 (6 pins), and four 2-pin headers are cut apart from:

Mil-Max 64 PIN HEADER 2.54mm spacing

575-010064 mouser.com $8.85

J1 (8 position) and four 2-position sockets are cut apart from:

Mil-Max 50 PIN SOCKET 2.54mm spacing

575-093050 mouser.com $5.26
1 18-pin DIP Socket for U3


mouser.com $0.22
1 Battery Holder for B1 534-103 mouser.com $1.73

B1: CR2032 3V Lithium coin cell

(This item will limit shipping choices, so you may want to purchase this battery locally)

658-CR2032 mouser.com $0.33
2 SW0*, SW1, SW2: Micro miniature tactile switch 506-FSMRA4JH04 mouser.com $0.23 each
1 SW3: Slide Switch SPDT Right-Angle PC mount (for 9V battery power)


mouser.com $4.00
1 9V Battery Snap Connector 534-84-6 mouser.com $0.92

Power Adapter 9V, with tip to match J2 jack listed above. I bought: Velleman Compact Universal DC Adapter Power Supply.

The tip that matches power jack J2 has a 2.5mm inside contact diameter, and a 5.5mm outside diameter, with the +9 volts on the center contact and Ground on the barrel.

PSSMV1USA amazon.com $14.50
192 Gold plated pins for IN-18 tubes to plug into. Search eBay for socket pins for IN-18. The pins are about 15 to 15mm long, and they look like the picture on the right. IN-18 socket pins eBay

*Note: For this version of the Divergence Meter I used the the DS3232 clock option. The IN-18 board does NOT require the extra jumper wires described in the DS3232 Option page. Parts U4B and C4B are surface mount parts that go on the backside of the main board.

*Note: Many of the parts marked on the boards are not actually needed:
Parts X1, C5, C6 (they were there if I wanted to use a faster external oscillator. NOT used);
Parts D2, R6 (a LED originally used as a test output during software development. Not needed);
Parts SW0, R0 (an extra pushbutton, not used. But I will put it on in case I later program a feature that uses it);
Parts X2, U4, C4 (parts for the old clock chip. NOT used in this version. U4B and C4B on the back replace these);
Parts LS1, Q1, R33, R34 (place for a beeper in case I want to add an alarm function. Never worked out the exact values for these parts or programmed any alarm functions);
Parts R21, R27 (these would be limiting resistors for "colon" displays, which I will not be using).


Dummy Components

These are sized for the IN-18 version, which is about 170% larger than the IN-14 version.

Quantity Description Part Number Source
9 Black Electrolytic Capacitors, 8mm diameter by 15mm long 647-UPW1E331MPD6 mouser.com $0.32 each
1 Supercapacitor (lower-left part of board). This part is 21.5mm diameter. Unfortunately, this part is only 8mm tall, which is shorter than desired. I used two of these (with one glued on top of the other), which is taller than desired. At $4.08 each, you may want to use just one. 598-EDLNF105B5R5C mouser.com $4.08
1 Ceramic Disc Capacitor, ~7.5mm diameter. The part I orderd from mouser (75-125LD22-R) is a good diameter, but fatter than I'd like. I'm going to use a 0.1 uF disc capacitor I had lying around from Radio Shack. 272-135 radioshack (2 for $2.49)
3 IC 16-pin DIP (any chip this size is fine... these are the cheapest chips I found at Mouser.com). These go behind the tubes.


mouser.com $0.45
1 TO-220 package device (I can't tell for sure what component is back there, so I stuck this in.)


mouser.com $0.69
1 Diode. DO-201 package. (This part looks a bit large...but the 512-1N4007 used on the IN-14 versions would be too small here) 576-LCE45A mouser.com $0.76
7 Resistors, 1/2 watt. I used 12K. 293-12K-RC mouser.com $0.19 each
5 Blue Resistors, 1/2 watt, metal film 1% (those are blue ones). I used 27.4K 660-MF1/2CC2742F mouser.com $0.19 each
4 Yellow Capacitors... Well, I couldn't locate capacitors of the correct shape or color. I'll have to spray paint some. Should be about 12mm wide by 9mm tall. Mouser 667-ECQ-E4473JF are 11mm by 7mm. Mouser 667-ECQ-E4104KF are 10.5mm by 9mm. None of these have the tapered-toward-the-top shape of the ones in the anime.


Parts for the Case

Quantity Description Part Number Source

Perf board for top piece.
Cut one pieces: 314.5mm x 90.5mm

574-169P59XXXP mouser.com $16.54

1/16 clear acrylic sheet plastic for bottom.
Cut two pieces: 314.5mm x 90.5mm
This could be some other sheet material.

This was plastic meant for putting in a picture frame. Purchased at a hobby store

Aluminum Sheet 0.032 thick:
Width: 51mm, Length: 309mm
(front/back of case)

  I had these pieces of aluminum cut at a metal shop. Thicker metal would be OK, but I had these cut from 0.032" metal at the same time I was getting pieces cut for the smaller IN-14 case.

Aluminum Sheet 0.032 thick:
Width: 51mm, Length: 83m
(sides of case)

1 1/16" basswood for spacers when mounting tube pc board to top of case. Made by Midwest Products Purchased at a hobby store

Styrene plastic angle stock 3/8" (9.5mm) for the corners of the case. Cut 4 pieces, 51mm long.

Plastruct 90508, Catalog no. AFS-12 Purchased at a hobby store
6 HEX STANDOFF 1/4" diameter, 1/2" length, 4-40 male/female 761-4534-440-AL-7 mouser.com $0.50 each
6 HEX STANDOFF 1/4" diameter, 1" length, 4-40 female/female. These (along with the part below) will be the corner and center posts for case construction method 2. 761-2112-440-AL-7 mouser.com $0.40 each
6 HEX STANDOFF 1/4" diameter, 15/16" length, 4-40 male/female. The length of the corner/center posts can be adjusted by screwing the twoparts together a little more or less to get the desired length, as needed. 761-4541-440-AL-7 mouser.com $0.59 each
6 4-40 Pan Head Machine Screws 3/8" long, to hold the bottom on.   hardware store
16 Small Phillips Pan Head Machine Screws to decorate the corners. 2-56 size, 1/8" long. I couldn't find them this short at my hardware store, so I order a pack of 100 on eBay.   hardware store or eBay



--"Tom Titor" of /a/