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please explain what TP3 does.

nickski

@copilot please explain what TP3 does.

copilot

Certainly! TP3 is a test point component in your schematic. Test points are used in electronic circuits to provide an accessible location on the board where measurements can be taken during testing and debugging.

In your project, TP3 has a single pin designated as "1", and it's part of the net labeled as Net 9. This net includes several other components, suggesting that it might be part of a common power or signal distribution path in your circuit. Specifically, it's connected to components such as the 3.3V rail, various capacitors, and other integrated circuits, which might indicate it's used for a 3.3V power distribution testing point.

If you have specific testing requirements for your project, TP3 would be a place to probe or inject signals to verify functionality. Let me know if you need any more details about its role in the schematic!

frankk

the Tp are only testpoint the U1 is de uC, ich habe to programe it for the themperatur protection of de laser diode and the batery underlowvoltag proteccton and the laser outputpower

copilot

Great! You're integrating the MCP4725A0T-E/CH DAC for analog output control and the MCP9808-E/MS temperature sensor into your design. Let's sort out the connections, assuming you want to interface these components with an ESP32-C3_SUPERMINI as the microcontroller, which includes various GPIOs and an I2C interface.

MCP4725 DAC ( $IC2$ )

Power Supply Connections:
- Connect $IC2:VDD$ to $3,3V$ :P1.
- Connect $IC2:VSS$ to $GND$ :1.
I2C Data Lines:
- Connect $IC2:SDA$ to $SDA$ :P1.
- Connect $IC2:SCL$ to one of the $SCL$ .

Generic I2C Network

Connect $IC2:SDA$ to $SDA$ :P1, $U7:SDA$ , $U5:SDA$ , $U11:SDA$ , and $U12:SDA$ .
Connect $IC2:SCL$ to $SCL$ :P1, $U7:SCL$ , $U5:SCL$ , $U11:SCL$ , and $U12:SCL$ .

Temperature Protection - $MCP9808$

Power, Data and Address Connections ( $U12$ ):
- Connect $U12:VDD$ to $3,3V$ :P1.
- Connect $U12:GND$ to $GND$ :1.
- Connect $U12:SDA$ to $U1:GPIO8$ .
- Connect $U12:SCL$ to $U1:GPIO9$ .
- You can use address pins $U12:A0$ , $U12:A1$ , and $U12:A2$ to set the I2C address. If you're not using them for multiple devices, you can connect these to $GND$ .

Battery Undervoltage Protection

For battery undervoltage protection, you can use the

INA237AQDGSRQ1

current sensor (

U5

Power Supply Connections:
- Connect $U5:VS$ to $3,3V$ :P1.
- Connect $U5:GND$ to $GND$ .
I2C Data Lines:
- Connect $U5:SDA$ to $U1:GPIO8$ .
- Connect $U5:SCL$ to $U1:GPIO9$ .
Voltage Measurement:
- Connect $U5:IN+$ to $R9:1$ , $R6:1$ , $C6:P1$ , and $J:2$ .
- Connect $U5:IN-$ to $C6:P1$ , $Q1:G$ , $R2:2$ , $R3:2$ .

Temperature Protection

For the

MCP9808-E/MS

temperature sensor

U7

Power Supply Connections:
- Connect $U7:VDD$ to $3,3V$ :P1.
- Connect $U7:GND$ to $GND$ .
I2C Data Lines:
- Connect $U7:SDA$ to $U1:GPIO8$ .
- Connect $U7:SCL$ to $U1:GPIO9$ .

Regarding the Laser Diode Output Power: For controlling the laser output power, the DAC

IC2

can be utilized. The output voltage from the DAC can be used to control the gate of a MOSFET, like

Q1

Q2

, which in turn will control the current going to the laser diode.

Here's a basic connection layout for

IC2

Connect $IC2:VOUT$ to $Q1:G$ or $Q2:G$ .

Make sure to configure the microcontroller’s GPIOs for I2C communication, and use pull-up resistors on the SDA and SCL lines, typically around 4.7kΩ, to ensure proper signal integrity.

If you have any specific questions or need further details, feel free to ask!

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Reviews

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
jharwinbarrozo
15.7k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M

Project Name

Laser

Description

Laser (Nichia NUBM35 455nm 67W)to 120w optical output power driver.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor	Qty 1
Arrow	$25.33–$43.54
Digi-Key	$38,025.02–$38,068.43
LCSC	$59.01–$92.83
Mouser	$44.56–$95.12
TME	$33.98
Verical	$32.35–$117.06

Assets

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Controls

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frankk / Laser

Schematic