Free wideband controller 4.9LSU

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STD Free wideband controller 4.9LSU

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License: GPL 3.0

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Update time： 2024-07-12 10:55:39

Creation time： 2021-05-01 23:19:15

Description

SLC Free 2 utilizes the Bosch LSU 4.9 Wideband O2 Sensor - a cost efficient Wideband O2 sensor providing 0.01 Lambda accuracy, fast response, and rated life of 100,000 km

Compatible with all fuel types

Lambda Range: 0.68[Lambda] linear to 1.36[Lambda]

0.01 Lambda accuracy without the need for any calibration

O2 Sensor Temperature Monitor

Did you know that the most common cause of inaccuracies and premature O2 sensor failure is attributed to the O2 sensor temperature being improperly controlled? Only 14Point7 branded Wideband O2 Controllers are able to monitor O2 sensor temperature?

Linear output allows easy interfacing with gauges, fuel management systems, and dataloggers

Linear Output: 0[v]@0.68[Lambda] linear to 5[v]@1.36[Lambda], 10[AFR] linear to 20[AFR] equivalent for gasoline

Note : sensor requires 12V fused power supply

CY8C24423A-24PVXI

programming via header pads, source code modification needed (remove lcd driver and display code)

download

https://cdn.shopify.com/s/files/1/0189/1312/files/SLC_Free_2_Source_Files_Jan_12_2020.zip?56

Design Drawing

schematic diagram

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PCB

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PCB_SLC_Free_mini wideband controller
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	1uF	C1,C2,C3	C0805	3
2	10nF	C4	C0805	1
3	100nF	C6	C0805	1
4	TS-1088-AR02016	CAL	SW-SMD_L4.0-W2.9-LS5.0	1
5	CY8C24223A	IC3	SSOP28	1
6	LSU4.9	J2	HDR-M-2.54_1X6	1
7	HDR-M-2.54_1x5	POWER/AFR/MAP	HDR-M-2.54_1X5	1
8	NCE3050K	Q1	TO-252-2_L6.6-W6.1-P4.57-LS9.9-TL-CW	1
9	1K	R1,R2,R3,R6,R7,R10,R14	R0805	7
10	120K	R4	R0805	1
11	61.9K	R5	R0805	1
12	10K	R8,R11	R0805	2
13	cypress	TP1,TP2,TP3,TP4,TP5	TESTPOINT	5