Wideband O2 Controller

Ongoing

STD Wideband O2 Controller

Arduino

Sensor_Module

Automotive_Electronics

License: GPL 3.0

Mode:

Editors' pick

Update time： 2024-08-07 21:03:34

Creation time： 2020-08-04 09:40:44

Description

Wideband O2 sensor controller for Bosch LSU sensors. * Lambda measurement range 0.67 to ∞ (air) * 0 to 5V true analogue output (Effective 12.1 to 18.1 AFR, petrol) * Sensor warm-up phase as specified by Bosch * PID heater control * 7-segment display * Heater cut-out in case of error Documentation is at [wiki.joeblogs.uk](https://wiki.joeblogs.uk)

Design Drawing

schematic diagram

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MCU & Interface
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Interface IC
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Connectors
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PCB

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CJ125 Wideband O2 PCB v1.1
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	220uF	C16	CAP-SMD_BD6.3-L6.6-W6.6-FD	1
2	301	R20	R0603	1
3	61.9	R21	R0603	1
4	100K	R22,R1,R3,R4,R5,R6,R14,R18,R19	R0603	9
5	470K	R23	R0603	1
6	4.7K	R24	R0603	1
7	39300060	U5	CONN-TH_39300060	1
8	39-30-0040	U6	CONN-SMD_39-30-0040	1
9	100uF	C1,C2,C3	CAP-SMD_L7.3-W4.3-R-RD	3
10	10nF	C4,C18	C0603	2
11	10uF	C5	C0603	1
12	100nF	C6,C7,C17,C8,C9,C11,C13,C14,C15	C0603	9
13	SS52-C51497	D1	SMB_L4.6-W3.6-LS5.3-RD	1
14	SMF16CA_C123805	D2	SOD-123FL_L2.8-W1.8-LS3.7-BI	1
15	1125-1105G3S13801	H1	HDR-TH_5P-P2.54-V-M	1
16	DR74-331-R	L1	INDM7676X435N	1
17	51K	R2	R0603	1
18	33Ω	R8,R25	R0603	2
19	28.7kΩ	R9	R0603	1
20	4.7kΩ	R10,R11	R0603	2
21	1-1825027-2	S1	118250272	1
22	LM7805-5V	U1	TO-252-2_L6.6-W6.1-P4.58-LS9.9-TL	1
23	ATTINY1614-SSFR	U2	SOIC-14_L8.7-W3.9-P1.27-LS6.0-BL	1
24	MCP6001T-E/OT	U3	SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BR	1
25	TM1637	U7	4DIGITS-TM1637	1
26	1nF	C10	C0603	1
27	1uF	C12,C19	C0603	2
28	STD30NF06LT4	Q1	DPAK_L6.5-W6.0-P2.29-LS9.9-BR	1
29	0	R7	R0603	1
30	10K	R12,R17	R0603	2
31	6.8K	R13	R0603	1
32	1K	R15	R0603	1
33	31.6K	R16	R0603	1
34	CJ125LQFP32	U4	LQFP32	1