Flashing Lamps


Posted on Mar 21, 2013

This circuit is intended as a reliable replacement to thermally-activated switches used for Christmas tree lamp-flashing. The device formed by Q1, Q2 and related resistors triggers the SCR. Timing is provided by R1, R2 & C1. To change flashing frequency do not modify R1 and R2 values: set C1 value from 100 to 2200µF instead.


Flashing Lamps
Click here to download the full size of the above Circuit.

Best performances are obtained with C1= 470 or 1000µF and R4= 12K or 10K. Due to low consumption of normal 10 or 20 lamp series-loops intended for Christmas trees (60mA @ 230V typical for a 20 lamp series-loop), very small and cheap SCR devices can be




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

5Mhz vfo
Low loss brightness control
Signal injectoh-tracer
Basic Circuit Modification of Kodak Disposable Camera
Testing Troubleshooting an Inverter Circuit Discussion
decibel meter circuit
smart amp delay
LED Hat
technical information for leds
Level 555 a control circuit diagram



Top