Products > Test Equipment
JBC Soldering Station CD-2BC - Complete Schematic & Analysis
shangaoren:
sorry, your picture does not help me a lot to understand why i get this measures ^^'
leo938:
John,
Many thanks for the detailed analysis, must have taken some time.
I have a similar station & was interested in trying to get it to trigger a fume extractor automatically when in use. I see in your analysis that you mention
--- Quote ---Moving on, the optocoupler controlled by the signal ISO1 does nothing on this unit.
--- End quote ---
I wonder if you can recall was this signal triggered by the iron being removed & returned to the station? If so it seems like one possible use for such an optocoupler setup like this & could be a simple way of implementation an automated fume extraction system.
Anyway thanks again for your analysis!
johnmx:
--- Quote from: leo938 on June 08, 2020, 09:46:54 pm ---John,
Many thanks for the detailed analysis, must have taken some time.
I have a similar station & was interested in trying to get it to trigger a fume extractor automatically when in use. I see in your analysis that you mention
--- Quote ---Moving on, the optocoupler controlled by the signal ISO1 does nothing on this unit.
--- End quote ---
I wonder if you can recall was this signal triggered by the iron being removed & returned to the station? If so it seems like one possible use for such an optocoupler setup like this & could be a simple way of implementation an automated fume extraction system.
Anyway thanks again for your analysis!
--- End quote ---
Hi Leo,
I don't remember if the signal ISO1 is always Hi-z or low, all I remember is that it never changes its state. It must be disabled in the current firmware.
If you want to enable an external device, my best recommendation is to monitor the voltage on the wire connected to the handle holder. See the circuit on my schematic around the connector "Sleep Detect".
You just need to add one N-Mosfet, one optocoupler and two resistors (one for the gate and another for the optocoupler LED).
Your idea is interesting and useful to me. So I will implement this on my unit.
leo938:
Thanks for the reply John,
I understand your suggestion about the MOSFET but I'm think of going with something like an LPC812 instead (to switch the optocoupler) which I have lying around. Its overkill I know but I think I'll implement a 30 sec delay after the iron is replaced in the stand before shutting off the fan, simple to do in a uC.
Thanks again!
johnmx:
--- Quote from: leo938 on June 09, 2020, 08:45:26 pm ---Thanks for the reply John,
I understand your suggestion about the MOSFET but I'm think of going with something like an LPC812 instead (to switch the optocoupler) which I have lying around. Its overkill I know but I think I'll implement a 30 sec delay after the iron is replaced in the stand before shutting off the fan, simple to do in a uC.
Thanks again!
--- End quote ---
The signal "SLP+" may not be constant. Probably the micro is alternating between Hi-Z and +3.3V. Check this by connecting a scope between Earth (banana connector on the back) and the metal part of the handle holder. Ideally you will have to connect your circuit only to this two signals. That way you don't have to open the unit.
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