Schematics > Video and TV > 4 Stage 555 Timer for Video Cam Control
4 Stage 555 Timer for Video Cam Control
4 Stage 555 Timer for Video Cam Control schematics
SW1-LED and R14 are an optional test indicator for setting up the cam.
C5,6,7 and 8 are 555 stability capacitors to prevent false triggering due to
power supply spikes.
Power supply bypass capacitors are not shown. Place 330μF
to 1000uF caps across power rails between timing section of circuit and relay /
solenoid section. Place o.1uF caps across all IC power pins as close as possible
to the IC's.
To minimize power consumption - use large value
"R"s for R2, 4, 6 and 8. Up to 1Megohm. Circuit consumes approx 0.6mA at rest.
Title: 4 Stage 555 Timer for Video Cam Control
Source: unknown
Published on: 2005-08-15
Reads: 661
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