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Circuits > Motor, light and power control > 120VAC Lamp Chaser
120VAC Lamp Chaser
This circuit is basically the same as the 10 channel LED sequencer with the
addition of solid state relays to control the AC lamps. The relay shown in the
diagram is a Radio Shack 3 amp unit (part no. 275-310) that requires 1.2 volts
DC to activate. No current spec was given but I assume it needs just a few
milliamps to light the internal LED. A 360 ohm resistor is shown which would
limit the current to 17 mA using a 9 volt supply. I tested the circuit using a
solid state relay (of unknown type) which required only 1.5 mA at 3 volts but
operates up to 30 volts DC and a much higher current. The chaser circuit can be
expanded up to 10 channels with additional relays and driver transistors. The
4017 decade counter reset line (pin 15) is connected to the fifth count (pin 10)
so that the lamps sequence from 1 to 4 and then repeat. For additional stages
the reset pin would be connected to a higher count.
120VAC Lamp Chaser circuit
Title: 120VAC Lamp Chaser
Source: unknown
Published on: 2007-07-21
Reads: 855
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Circuits > Motor, light and power control > 120VAC Lamp Chaser |
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