• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Get free circuit help 24/7

New Projects | Privacy Policy | About us | Contact | Disclaimer | Copyright | Videos | Circuits for Beginners | Basic Circuits | Hobby Projects | Transistor Circuits | LED Drivers 

You are here: Home / 4060 IC Circuits / Aquarium Fish Feeder Timer Controller Circuit

Aquarium Fish Feeder Timer Controller Circuit

Last Updated on July 20, 2019 by Swagatam 14 Comments

caution electricity can be dangerous

The post explains an aquarium feeder timer circuit which sustains a set of continuous operations as per a predetermined timing sequence through the respective pot controls. The idea was requested by Mr. Mike.

Technical Specifications

I am trying to build a timer circuit to control an automatic fish feeder. It needs to operate on 12 volts. It needs to operate two relays. Both need to come on at the same time.

The first relay needs to shut off after 5.2 seconds. The second relay needs to shut off after 7 seconds. Then the process needs to repeat in 24 hours. Also can you convert 16 volts ac into 12 volts dc.

Thank you Mike

Circuit Diagram

The Design

As shown in the proposed fish feeder timer controller circuit, N1, N2 and N3, N4 are the four NAND gates from the IC 4093, configured as flip flop timer stages.

N1, N2 forms the 7 second delay timer, the period may be adjusted and set with the help of the 1M pot, identically N3, N4 is wired up as the second 5.2 second delay generator stage.

IC 4060 is designed as the 24 hour timer circuit for the required cycling of the desired time sequences.
When the circuit is powered, the 0.1uF capacitors at the inputs of N1 and N3 ground the respective inputs via the 100k resistors, rendering a negative latch across gate outputs, which in turn keep transistor relay driver switched OFF.

Now, for initiating the circuit the "start" button is pressed which reverts the gate latches to positive switching ON the relays simultaneously. This condition forces pin12 of IC 4060 to become high so that it stays disabled for the time being.

As per the proposed settings of the 1M pots, after about 5 minutes the capacitor at the N3 output charges up first forcing the N4 input to go high which yet again restores the latch to negative switching off the 5 second relay first, exactly in the same manner N2 relay follows and gets switched OFF after next 2 seconds.

The above situation causes the output of N2 and the input of N1 to go "low" which means now pin12 of IC 4060 is enabled at the required "low" allowing it to begin its counting until the stipulated 24 hour time is elapsed, when its pin3 goes high causing an automatic triggering of the above explained cycle.
The process now keeps repeating indefinitely as long as the aquarium feeder circuit is held in the powered state.

You'll also like:

  • 1.  Buzzer with Incrementing Beep Rate
  • 2.  3 Interesting DRL (Day Time Running Light) Circuits for Your Car
  • 3.  Input Trigger Synchronized Monostable Timer Using IC 555
  • 4.  Programmable Temperature Controller Circuit with Timer
  • 5.  Rain Triggered Instant Start Windshield Wiper Timer Circuit
  • 6.  Thermostat Delay Relay Timer Circuit

About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

Have Questions? Please Comment below to Solve your Queries! Comments must be Related to the above Topic!!

Subscribe
Notify of
14 Comments
Newest
Oldest
Inline Feedbacks
View all comments

Primary Sidebar

Calculators

  • 3-Phase Power (15)
  • 324 IC Circuits (19)
  • 4017 IC Circuits (52)
  • 4060 IC Circuits (25)
  • 555 IC Circuits (98)
  • 741 IC Circuits (19)
  • Arduino Engineering Projects (83)
  • Audio and Amplifier Projects (114)
  • Battery Chargers (82)
  • Car and Motorcycle (94)
  • Datasheets (46)
  • Decorative Lighting (Diwali, Christmas) (33)
  • Electronic Components (100)
  • Electronic Devices and Circuit Theory (36)
  • Electronics Tutorial (116)
  • Fish Aquarium (5)
  • Free Energy (34)
  • Fun Projects (13)
  • GSM Projects (9)
  • Health Related (20)
  • Heater Controllers (29)
  • Home Electrical Circuits (102)
  • How to Articles (20)
  • Incubator Related (6)
  • Industrial Electronics (28)
  • Infrared (IR) (40)
  • Inverter Circuits (98)
  • Laser Projects (12)
  • LED and Light Effect (93)
  • LM317/LM338 (21)
  • LM3915 IC (25)
  • Meters and Testers (65)
  • Mini Projects (148)
  • Motor Controller (67)
  • MPPT (7)
  • Oscillator Circuits (26)
  • PIR (Passive Infrared) (8)
  • Power Electronics (34)
  • Power Supply Circuits (77)
  • Radio Circuits (10)
  • Remote Control (48)
  • Security and Alarm (61)
  • Sensors and Detectors (120)
  • SG3525 IC (5)
  • Simple Circuits (75)
  • SMPS (29)
  • Solar Controllers (60)
  • Timer and Delay Relay (53)
  • TL494 IC (5)
  • Transformerless Power Supply (8)
  • Transmitter Circuits (40)
  • Ultrasonic Projects (16)
  • Water Level Controller (45)

Calculators

  • AWG to Millimeter Converter
  • Battery Back up Time Calculator
  • Capacitance Reactance Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • Inductance Calculator
  • LC Resonance Calculator
  • LM317, LM338, LM396 Calculator
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • Reactance Calculator
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • Transistor Astable Calculator
  • Transistor base Resistor Calculator
  • Voltage Divider Calculator
  • Wire Current Calculator
  • Zener Diode Calculator

© 2023 · Swagatam Innovations

wpDiscuz