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--- dylos_dc1700 [2024/11/10 07:35] – created river
+++ dylos_dc1700 [2024/11/24 21:24] (current) – river
@@ Line 2: / Line 2: @@
 Contains a laser and sensor. Appears to detect light scattered by particles that pass the laser beam. Air forced through channel by a fan.
+{{ :dc1700.pdf | Manual}}
+DC power input 12V centre positive. With added ESP8266, draws about 300mA peak on start, then 200mA steady. The board gets pretty warm for some reason.
+Clock battery: CR1220s 3V.
+====== Modifications ======
+I have modified the one I had. When I got it, it was already a bit broken. Fan disconnected and no main battery. I replaced the fan. I added an ESP8266, which is connected to the UART output of the PIC to read the measurements. I didn't connect a line the other way. I expect it will need to be calibrated for the new fan and changed wiring / battery removal etc. as it will have affected the airflow.
+The external serial port is not connected to anything.
 ===== Serial Connection =====
@@ Line 14: / Line 26: @@
 would mean the average concentration over the past minute
 was 67,500 particles per cubic foot." (manual)