Security lights controlled by alarm system

[J de Beer]

Good day
I am a pensioner in South Africa with a little knowledge of electronics. I please need some help with the following: I have built a circuit that controls my security lights via the security system is and it is 100% functional for a long time.
I have only one problem and I hope someone can assist me. When the power is turned on, the "Kingdom Electronics 12v Versatile Timer" reseives a "jolt/surge?" Of power and the relay closes for a second and then opens to the normal position. I have removed the trigger wire and tested it with the same result. What can be done to prevent the relay of the timer to unnecessary activate for a split second? The system works 100% in all other respects.

Thanx in advance for any help.

 

[dr pepper]

Hi and welcome.
Sounds like the circuit uses a 555, to be honest I think you'd be better looking for another timer that doesnt have the same parasitic.

 

[alec_t]

Can you post a schematic of the timer?

 

[KeepItSimpleStupid]

The timer might be here: **broken link removed**

There are three things you can do:

1. re-seat the jumpers
2. Your power supply filter caps might be bad (too much ripple). You can try a 9V battery.
3. What is the chip # of the IC. If the reset circuit is a simple RC network it could be bad.

 

[AnalogKid]

The timer module uses a PIC 12F629 as the timing engine. As such, a brief relay pulse is a surprise and a sign of bad design.

Please post a drawing showing how the timer is connected to your system. Show every wire going to any connector position.

ak

 

[KeepItSimpleStupid]

Manually trace what;'s connected to pin 3. The 3rd pin to the right of the depression/

 

[J de Beer]

Good day
Thank you very much to everybody who tried to help. The timer is exactly the one that is shown. I will check everything and try to produce a drawing which I will post as soon as possible.
Kind regards