Description: For faster results, reduce C2. Don't use less than 1.5k on R1 and R2. R2 controls the OFF time which is 0.4-0.25=0.15 seconds, so that R2=2.2K ohms. R1 controls the ON time.

See previous diagram.

PARTS LIST:

U1 ------ LM555 MONOSTABLE TIMER

Q1 ------ 100V 28A 0.0429ohm POWER MOSFET Package D2PAK 2, 1, 3

L1 ------ SOLENOID 3 OHM WATER MIST SPRAYER SOLENOID

S1 --------- SWITCH TOGGLE SPDT

R1 ------ RESISTOR 1.5K 1/4watt rating

R2 ------ RESISTOR 2.2K 1/4watt rating

R3 ------ RESISTOR 1K 1/4watt rating

C1 ------- 0.1uF

C2-------- 100uF 16WVDC

C3 ------- 10uF

D1 -------- 1N4001 RECTIFIER DIODE

D2 -------- 1N914A DIODE