STM32EZ-ScopeV2 Dual channel STM32 oscilloscope

Ongoing

STD STM32EZ-ScopeV2 Dual channel STM32 oscilloscope

STM32

Measuring

Analog

License: CERN Open Hardware License

Mode:

Editors' pick

Cloned from STM32EZ-ScopeV1

2.8k
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Update time： 2022-06-29 19:42:44

Creation time： 2022-05-27 13:37:36

Description

The STM32F103CBT6 microcontroller comes with dual 12 bit ADCs capable of working in parallel and sample rate up to 0.8 MSPS, which are an ideal match for a low bandwidth dual channel oscilloscope.

The analog front end is as simple as possible for the purpouse of lower noise, no post construstion adjusments and build simplicity. For that reason it has only two independently switchable gains per channel, the rest is to be done in software. Triggering is also to be accomplished in software.

Both channels should allow for a 200 kHz bandwith, with the option of interleaved single channel mode with higher bandwidth capability (HW modification required).

Display used is an 2.4" 320x240 TFT touch display module with an SDcard slot (for saving waveforms).

Software in progress...

Project is a sequel to version one, which I independently developed as a semestral project on the CTU FEE (GitLab page is in Czech language):

https://gitlab.fel.cvut.cz/slehojan/stm32ez-scopev1

Design Drawing

schematic diagram

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STM32EZ-ScopeV2
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PCB

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PCB_STM32EZ-ScopeV2
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	100n	C1,C12,C13,C14,C15,C16,C20	C0603	7
2	100n	C2,C3	CAP-TH_L6.3-W2.8-P5.2-D0.5	2
3	15p	C4,C5	C0603	2
4	0.1u	C6	C0603	1
5	3n3	C7,C8	C0603	2
6	100u	C9,C19	C1206	2
7	82p	C10,C11	C0603	2
8	20p	C17,C18	C0603	2
9	MMBZ5V6A	D1,D6	SOT-23_L2.9-W1.3-P1.90-LS2.4-BR	2
10	1N4148	D2,D3,D4,D5	SOD-123_2PIN-L3.85-W1.70-L	4
11	Li-Ion	H1	HDR-2X1/2.54	1
12	Probe Comp	H2	HDR-M-2.54_1X1	1
13	Expansion	H3	HEADER-FEMALE-2.54-1X12	1
14	Boot0	H4	HDR-TH_3P-P2.54-V	1
15	Boot1	H5	HDR-TH_3P-P2.54-V	1
16	Reset	H6	HDR-2X1/2.54	1
17	UART	H7	HDR-TH_3P-P2.54-V	1
18	S1A050000	K1,K2	S1A050000	2
19	red	LED1	LED0603_RED	1
20	green	LED2	LED0603_GREEN	1
21	TFT_Dotyk	P1	HDR-TH_14P-P2.54-V	1
22	TFT_SD	P2	DIP-1X4P2.54	1
23	330	R1	R0603	1
24	10k	R2,R9,R10,R13,R14,R15,R16,R18	R0603	8
25	1M	R3,R4	R0603	2
26	39k	R5,R6	R0603	2
27	4k7	R7	R0603	1
28	390	R8,R11	R0603	2
29	15k	R12	R0603	1
30	BNC CH1	RF1	BNC-TH_DOSIN-801-0039	1
31	BNC CH2	RF2	BNC-TH_DOSIN-801-0039	1
32	Power Switch	SW1	HDR-M-2.54_1X3	1
33	TP4057ST26P	U1	SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL	1
34	NC7SZ66P5X	U2,U3	SC-70-5_L2.1-W1.3-P0.65-LS2.1-BL	2
35	74LVC1G17GV,125	U4	SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BR	1
36	XC6206P332	U5	SOT-23_L2.9-W1.3-P0.95-LS2.4-L-CW	1
37	MCP6294-E/SL	U6	SOIC-14_L8.7-W3.9-P1.27-LS6.0-BL	1
38	LM321	U7	SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BR	1
39	STM32F103CBT6	U8	LQFP-48_L7.0-W7.0-P0.50-LS9.0-BL	1
40	USB_F_MINI	USB1	MINI-USB-SMD_KH-MINI-SMT-5P-CU	1
41	8.000MHZ	X1	XTAL-TH_2PIN-L11.05-W4.65-PITCH4.88	1