Can anyone tell me what the yellow components on this pcb are please? At first I thought diode - they measure 0.7 V but then 1.7V when measuring reverse-bias. Then I thought capacitor - but the both measure 0 nF. What test should I do to find out what they are? They are part of a HALJIA Digital Light Intensity Sensor Module. The circuit is design to switch a DO when the light reaches a certain level that is adjustable using the pot.

Can anyone tell me what the yellow components on this PCB are please?

At first I thought diode - they measure 0.7 V but then 1.7V when measuring reverse-bias.

Then I thought capacitor - but the both measure 0 nF.

What test should I do to find out what they are?

They are part of a HALJIA Digital light intensity sensor module. The circuit is design to switch a digital output when the light reaches a certain level that is adjustable using the potentiometer.

Can anyone tell me what the yellow components on this pcb are please? I thought diode - they measure 0.7 V but then 1.7V when measuring reverse-bias so not so sure. What test should I do to find out what they are? They are part of a HALJIA Digital Light Intensity Sensor Module.

Can anyone tell me what the yellow components on this pcb are please? At first I thought diode - they measure 0.7 V but then 1.7V when measuring reverse-bias. Then I thought capacitor - but the both measure 0 nF. What test should I do to find out what they are? They are part of a HALJIA Digital Light Intensity Sensor Module. The circuit is design to switch a DO when the light reaches a certain level that is adjustable using the pot.