Research Article

Affordable Bimodal Optical Sensors to Spread the Use of Automated Insect Monitoring

Figure 19

LED driver. The infrared emitter is composed of 4 LED SFH4247 driven from the MOSFET BSS138. The transistor and MOSFET setup provides stable current to LEDs 0.65 V/42 ohms = 15.4 mA per LED. The circuit is powered by 3.3 V and admits a CLOCK 455 KHz from the MCU.