I am repairing several Arlec sensor coach lamps -old style made properly with glass and metal. I am using LED lamps, only 8W or so power.
I have bought this small 240V PIR off Ebay. It looks a bit flimsy but it's $4 compared to $18 for the relay ones. Considering I have to repair around 6 lamps saving could be substantial.
The main problem with this PIR device is that the delay time is too short and not adjustable currently.
My question is: can i change the delay using e.g a larger capacitor and / or larger / smaller resistors?
Problem is, I have no idea how it works and most components are SMD.
I am posting a few photos, if you need other angles let me know. I could not get the wires out of the way yet as the connector is still on and does not fit through the hole.
Caps are 22uF 25V. Larger caps are not a problem space wise. The circuit is very small - this is good because the original lamps had the PIR and LDR separate from the main circuit. I cloud fit the whole thing in the small PIR sensor case.
I do not need to have controls outside the lamp, just set a time of say 7-8 minutes. It is already working only in the dark.
Any help would be great, thanks,.
EDIT: I found: M7: rectifier; MB10: bridge rectifier; 7130: MOSFET transistor; C106MS Sensitive gate silicon controller rectifier (? what?)
EDIT2: Ha, there seems to be an adjustable version on AE - and see this Russian site with the schematics also... Question is, can i extend the 4 minutes... hm. Might buy one off AliExpress anyway.
EDIT3: The Russian discussion is very interesting - use Google translate... I might get one of AE but I'd like to extend the delay time from 4mins to 8-10 mins...
I have bought this small 240V PIR off Ebay. It looks a bit flimsy but it's $4 compared to $18 for the relay ones. Considering I have to repair around 6 lamps saving could be substantial.
The main problem with this PIR device is that the delay time is too short and not adjustable currently.
My question is: can i change the delay using e.g a larger capacitor and / or larger / smaller resistors?
Problem is, I have no idea how it works and most components are SMD.
I am posting a few photos, if you need other angles let me know. I could not get the wires out of the way yet as the connector is still on and does not fit through the hole.
Caps are 22uF 25V. Larger caps are not a problem space wise. The circuit is very small - this is good because the original lamps had the PIR and LDR separate from the main circuit. I cloud fit the whole thing in the small PIR sensor case.
I do not need to have controls outside the lamp, just set a time of say 7-8 minutes. It is already working only in the dark.
Any help would be great, thanks,.
EDIT: I found: M7: rectifier; MB10: bridge rectifier; 7130: MOSFET transistor; C106MS Sensitive gate silicon controller rectifier (? what?)
EDIT2: Ha, there seems to be an adjustable version on AE - and see this Russian site with the schematics also... Question is, can i extend the 4 minutes... hm. Might buy one off AliExpress anyway.
EDIT3: The Russian discussion is very interesting - use Google translate... I might get one of AE but I'd like to extend the delay time from 4mins to 8-10 mins...
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