Alternating turn signals for controlling LEDs in St. Andrew's crosses, warning lights and blue lights. Two transistors on the circuit board serve as switches and alternately turn on and off the power supply for two LEDs. out of. Depending on the capacity of the capacitors used and the associated resistors, the circuit flashes faster or slower. When fitted with the original components, the flashing frequency is approx. 1 to 2 Hz. With detailed instructions. You can also purchase this item as a kit in my shop. Electrical timer switch INVENSYS MS65, 220 V, 16 A/230 V~, 15 min. Precision engineer screwdriver and hook set, 12 pieces, 170 mm Soldering gun with tin feed / 3 adjustable temperature ranges Precision mechanic Torx screwdriver set 7 pieces with plastic storage box supremeauctiononl.