Oz DIY-WB Location Guide

This guide should allow you to quickly find components. There are 3 parts, the location guide image, the same image but showing component values rather than component designations, and the component list as text (rather than an eXcel spreadsheet). This document should print successfully, but larger versions can be obtained by saving each GIF image and scaling it by a factor of two and printing in a portrait, rather than landscape, direction.

Resistors are show in ohms, and a 2k2 designation means 2.2 k ohm (ie. 2,200 ohms). Unless specified, resistors have a tolerance of 5%. Capacitors are shown in uF (micro Farad). Blue capacitors are block monolithic (decoupling). The yellow capacitors are polyester (higher tolerance). The red capacitors are electrolytic, so note their orientation shown with a (+) and a red bar for -ve. Note that U2, U4 and U9 are shown incorrectly on the component overlay (they are reversed, but shown correctly on each of these images). Optional components (U8, U9, R42, R43 and the DB9) are shown in grey.

Part	Loc.	Part Type	Description
U1	2G	LM324A	Quad Op-amp DIP-14
U2	2I	LM324A	Quad Op-amp DIP-14 (*orient as for U1)
U3	4F	CD4066B	CMOS quad switch DIP-14
U4	5G	LM78L08	8 Volt Reg. T0-92 (*rotate 180 deg.)
U5	5D	4N25	Opto Isolator DIP-6
U7	3A/3B	LM317T (LM1086 )	3-AMP Adjustable regulator TO-220
U8	4I	TINY15L (optional)	Atmel ATtiny SO-8 (not supplied)
U9	5H	LM78L05 (optional)	5 Volt regulator TO-92 (not supplied) (*rotate 180 deg.)
Q1	3E	2N3904	NPN BJT
Q2	4E	2N3906	PNP BJT
Q3	5B	2N3906	PNP BJT
Q4	4B/5B	2N3906	PNP BJT
D1	3E	1N4148	or IN914 Band to circular pad
D2	4E	1N4148	or IN914 Band to circular pad
D3	4E/5E	1N4148	or IN914 Band to circular pad
D4	3H/4H	LM431A	Zener shunt regulator TO-92 or SO-8
D5	4C	LM431A	Zener shunt regulator TO-92 or SO-8
D6	4B/5B	1N4148	GP silicon Diode
D7	6E	1.5KE-33A	Transorb/Zener Diode
D8	3I	LM385M-1.2	1.2 Volt Reference TO-92 or SO-8
L1	5C	LED	LED Cathode (short leg, cup) left
CON1	6B	8 HEADER	7 Pins used (4 mm pitch)
CON2	6F	CON2	2 pin Connector (4 mm pitch)
CON3	6I	DB9 (optional)	90 degree PCB mount MALE DB9-P (not supplied)
C1	2F	0.1 uF	Block Monolithic (decoupling)
C2	1G	0.1 uF	Polyester
C3	4G	0.1 uF	Block Monolithic (decoupling)
C5	1I	0.1 uF	Block Monolithic (decoupling)
C6	3G/3H	1 uF	Polyester
C7	2E/2F	10 uF	Electro +ve @ top
C8	4A/5A	10 uF	Electro +ve @ right
C9	4A	10 uF	Electro +ve @ left
C10	5A/6A	10 uF	Electro +ve @ bottom
C11	5E	3.3 uF	Electro +ve top
C12	5G/6G	22/25 uF	Electro +ve right
C13	4G	10 uF	Electro +ve left
C14	5D	47 uF	Electro +ve right
C15	4A	0.1 uF	Block Monolithic (decoupling)
R1	3F	10 k 1%	1/4 W Resistor
R2	2I	10 k 1%	1/4 W Resistor
R3	3G	100 k 1%	1/4 W Resistor
R4	3G/3H	56 k	1/4 W Resistor
R5	2H	30 k 1%	1/4 W Resistor
R6	2H	47 k	1/4 W Resistor
R7	3F	1 k	1/4 W Resistor
R8	2I	1 k	1/4 W Resistor
R9	3E/3F	27 k	1/4 W Resistor
R10	4E	27 k	1/4 W Resistor
R11	5E	33 k	1/4 W Resistor
R12	6E	33 k 1%	1/4 W Resistor
R13	4D	100 ohm 1%	1/4 W Resistor
R14	2J	100 k 1%	1/4 W Resistor
R15	2I	100 k 1%	1/4 W Resistor
R16	D5	100 k	1/4 W Resistor
R17	5F/5G	100 k	1/4 W Resistor
R18	2F/2G	68 k	1/4 W Resistor
R19	2G	3.3 k	1/4 W Resistor
R20	1H	22 k	1/4 W Resistor
R21	1F/1G	22 k	1/4 W Resistor
R22	3H	4.7 k	1/4 W Resistor
R23	1J	1.5 k 1%	1/4 W Resistor
R24	4E/5E	2.2 k 1%	1/4 W Resistor
R25	2J	10 k	1/4 W Resistor
R26	3I/3J	22 k 1%	1/4 W Resistor
R27	3I	10 k 1%	1/4 W Resistor
R28	3J	10 k 1%	1/4 W Resistor
R29	3J/4J	10 k 1%	1/4 W Resistor
R30	4B	47 k	1/4 W Resistor
R31	5C	47 k	1/4 W Resistor
R32	3H/3I	82 k	1/4 W Resistor
R33	3I/3J	10 ohm	1/4 W Resistor
R34	5B/6B	1 k	1/4 W Resistor
R35	4B	1 k	1/4 W Resistor
R36	5A/5B	100 k	1/4 W Resistor
R37	5B	2.2 k 1%	1/4 W Resistor
R38	4C/4D	1.5 k 1%	1/4 W Resistor
R39	4C	4.7 k 1%	1/4 W Resistor
R40	3C/4C	Adjust to suit	1 W Resistor (supplied as 6.8 ohms)
R41	3C	1 ohm 5W	5 W wire wound
R42	4J	47 k SMD (optional)	1/4 W Resistor (not supplied)
R43	4I	47 k SMD (optional)	1/4 W Resistor (not supplied)
Misc.	3A	TO-220 mounting	plastic insulating washer, nut, bolt, metal washer, silicon insulator

Parts Kit Notes:

Parts are supplied divided into resistor, capacitor, IC and semiconductor compartments, with CON1/CON2 and R41 in the remaining space. You should first sort and verify the resistance of each resistor, and check that no parts are visibly damaged.

The optional components are not required for the unit as supplied. The original intention was that an ATtiny 8 pin microprocessor would be programmed to provide a serial output voltage, and to scale the non-linear Vout to a linear transfer function. We have no intention to provide this facility for the current version of the PCB, due primarily to the difficulty of supplying the programmed surface mount device for end user installation.

A male DB9 connector will aid connecting the DIY-WB PCB to a display, ECU and/or logging device.

We appreciate your feedback on the content and any corrections necessary to this article.