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Timers and
Counters Circuits, Page 5 Timers & Counters:
#-AB-EF-LM-S T-Z Last Updated on:
Monday, October 03, 2011 06:08 PM
Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
Three Stage Cycling Timer Circuit (Traffic Light Circuit) - Uses
the LM555 timer or its cousins with other letter prefixes. There can be
minor differences between 555 timer IC's from different manufacturers but
they all should be useable for any circuit. Designed for Model
Trains…. [from Rob Paisley's Model Train web site]
Ticking Bomb - This circuit sound just like a ticking bomb.
Tilt Switch - The output is LOW at start-up due to the capacitor
on pin 4. When the mercury switch closes, the output goes HIGH and remains
HIGH until the reset button is pressed. This circuit is called a
LATCH.
Time Delay Circuits - Uses the LM555 timer or its cousins with
other letter prefixes. There can be minor differences between 555 timer IC's
from different manufacturers but they all should be useable for any circuit.
Designed for Model Trains…. [from Rob Paisley's Model Train web site]
Timer Circuits With 4060B - Build a reliable timer to switch
devices on and off - from 30 seconds to 24 hours…. [REUK - Renewable Energy
UK website]
Tiny Timer - Developing a lighting control unit recently, the author found
that available analogue or mechanical timers were not sufficiently accurate or
convenient. Without further ado he developed a timer switch driven by a small AVR
controller of the type ATtiny2313.….must register on this site.... [Published in
Elecktor July/August 2010]
Touch Switch - The Touch Switch circuit will detect stray voltages produced
by mains voltages and electrostatic build-up in a room. In the first circuit, pin 2
must see a LOW for the circuit to activate. If sufficient static voltage is
detected by the plate, the chip will change state. If not, you will need to touch the
plate and the 0v rail....
Toy Organ - This circuit produces a tone according to the button being
pressed. Only 1 button can be pressed at a time, that's why it is called a monophonic
organ. You can change the 1k resistors to produce a more-accurate scale….
Traffic Light - This project operates red, amber and green LEDs in the
correct sequence for a single UK traffic light. The time taken for the complete red,
red & amber, green, amber sequence can be varied from about 7s to about 2½ minutes. A
4017 counter is used to produce the traffic light sequence and this project could be
adapted.... [John Hewes]
Traffic Lights - Here's a clever circuit using two 555's to produce a set of
traffic lights for a model layout. The animation shows the lighting sequence and this
follows the Australian-standard. The red LED has an equal on-off period and when it is
off, the first 555 delivers power to the second 555....
Traffic Lights - 4 Way - This circuit produces traffic lights for a "4-way"
intersection. The seemingly complex wiring to illuminate the lights is shown to
be very simple, in this diagram.
