Hi guys.
I am using a laser sensor that outputs 5v when it detects the light of the laser. I am trying to use the output to energise a relay.
The relay was originally a part of a pcb where you could move a jumper to select whether to energise the relay with a high or low signal, power led, energised led etc.
The sensor circuit works perfect on its own, it outputs 5v no problem, however when connected it to the ini of the relay pcb the sensor would only output 1.4v and therefore would not energise the relay. When adding a direct 5v supply to the ini of the relay circuit it energised fine. I decided to de-solder the relay to use it on its own. Again when not connected the sensor circuit outputs 5v no problem, however when connected to the relay it now reads 0v. The relay energises ok when i put a direct 5v source so the relay is working fine.
Does anybody have any idea what could be happening?
I have attached a circuit diagram of how it currently stands with the sensor circuit wired direct to the relay.
Thanks
I am using a laser sensor that outputs 5v when it detects the light of the laser. I am trying to use the output to energise a relay.
The relay was originally a part of a pcb where you could move a jumper to select whether to energise the relay with a high or low signal, power led, energised led etc.
The sensor circuit works perfect on its own, it outputs 5v no problem, however when connected it to the ini of the relay pcb the sensor would only output 1.4v and therefore would not energise the relay. When adding a direct 5v supply to the ini of the relay circuit it energised fine. I decided to de-solder the relay to use it on its own. Again when not connected the sensor circuit outputs 5v no problem, however when connected to the relay it now reads 0v. The relay energises ok when i put a direct 5v source so the relay is working fine.
Does anybody have any idea what could be happening?
I have attached a circuit diagram of how it currently stands with the sensor circuit wired direct to the relay.
Thanks
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