5V DC (Accepts a range from 4.8V to 12V due to the regulator) Output Voltage: 3.3V DC (to power the nRF24L01) Regulator IC: AMS1117 3.3V
| Problem | Likely Cause | Fix | |---------|--------------|-----| | Laser very dim | Voltage <4.5V | Use separate 5V supply | | No light at all | SIG floating | Add a pull-down resistor (10kΩ) or set LOW/HIGH explicitly | | Beam not visible in room | Focus misadjusted | Turn potentiometer until a small dot appears | | Module gets hot | Current >40mA | Add a 10Ω–33Ω resistor in series with VCC | yl-105 datasheet
The YL-105 module typically features 4 male header pins arranged in a single row. The silkscreen on the board is usually labeled, but if your board is unclear, here is the standard pin 5V DC (Accepts a range from 4
The YL-105 is a compact, pre-amplified temperature sensor module. At its core is a 10kΩ NTC thermistor – a resistor whose resistance decreases non-linearly as temperature increases. Unlike a bare thermistor, the YL-105 module includes signal conditioning components: Unlike a bare thermistor, the YL-105 module includes