I’m trying to resolve a problem with this latch and release break beam circuit – with PNP transistor amplifier It works fine for a few minutes then consistently breaks down – as though the transistor is getting overheated?
It works again after about 20 mins.. It’s driving me nuts!
I’m not very clued up on transistor selection.. and mainly using what’s been available in a liitle selection pack.. then I have pages of scrawling’s which have lead me to arrive at resistor values – I’ve tried lots of transistors and different resistors but any combination which works still seems to fade away after repeated use.
It was suggested that I add a flyback diode – which I tried (in blue) this made no difference
Please explain the intended operation.
There are three components whose functions need simple explanations:
What does the IR LED receive and what is supposed to happen when it receives?
What is expected to happen when you push the momentary trigger?
What is the purpose of the relay? Usually a relay has two wires that energize a coil and switches the connection state of 2 or 3 wires or a multiple thereof. Here I only see what I currently assume is the coil connection.
OP needs a switch there, not an amp, makes sense, but my concern is how is the IR supposed to trigger this. Is there supposed to be a code received or is it supposed to switch on with every pulse of IR received?
