elganzua124
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Hello, I'm an beginner argentinian programmer, with no idea about designing pcb, but forced to try to design one. Let me explain, my first idea was to purchase the "Small Breakout for SIM908 GSM&GPS Module" for learning purposes. But here in Argentina is very complicated to import components. So I purchased the sim908 module, and I want to manage it through a Raspberry Pi like this:
Raspberry Pi --> expansion shield --> pcb --> sim908
expansion shield diagram:
https://www.open-electronics.org/wp-content/uploads/2013/10/FT1075_schematic.jpg
BOM
R1: 5,6 kohm
R2: 3,3 kohm
R3: 4,7 kohm
C1: 100 nF
C2: 470 µF 25 VL
C3: 100 nF
C4: 470 µF 16 VL
C5: 47 pF
C6: 47 pF
C7: 47 pF
C8: 47 pF
C9: 47 pF
C10: 47 nF
C11: 470 µF 16 VL
C12: 100 nF
U1: 7805
D1: 1N4007
D2: 1N5819
CRTC: 0,1F low profile
PCB diagram ("Small Breakout for SIM908 GSM&GPS Module"):
https://www.futurashop.it/images/7100-FT971_SCH.jpg
The shield isn't the problem, I can make it for myself.
The pcb is for sure the obstacle.
The design and the making of the pcb will be performed for an domestic factory. The problem is that I don't know what smd components I need to buy. Any help will be appreciated. Please do not be angry with me, I'll do my best. And apologies for my horrible english.
Raspberry Pi --> expansion shield --> pcb --> sim908
expansion shield diagram:
https://www.open-electronics.org/wp-content/uploads/2013/10/FT1075_schematic.jpg
BOM
R1: 5,6 kohm
R2: 3,3 kohm
R3: 4,7 kohm
C1: 100 nF
C2: 470 µF 25 VL
C3: 100 nF
C4: 470 µF 16 VL
C5: 47 pF
C6: 47 pF
C7: 47 pF
C8: 47 pF
C9: 47 pF
C10: 47 nF
C11: 470 µF 16 VL
C12: 100 nF
U1: 7805
D1: 1N4007
D2: 1N5819
CRTC: 0,1F low profile
PCB diagram ("Small Breakout for SIM908 GSM&GPS Module"):
https://www.futurashop.it/images/7100-FT971_SCH.jpg
The shield isn't the problem, I can make it for myself.
The pcb is for sure the obstacle.
The design and the making of the pcb will be performed for an domestic factory. The problem is that I don't know what smd components I need to buy. Any help will be appreciated. Please do not be angry with me, I'll do my best. And apologies for my horrible english.