All the information you need to Simulate Ron J's Battery Powered Alarms.

Cmos 4001 Tutorial Ron's Circuits Write To Ron More Free Circuits Cmos 4011 Tutorial
Comments Homer
Suggestions
Practical Guides Choosing Parts Useful Free Software More Small Alarms Firefox Optimised

Mini Alarms 5 & 6 - Simulations

SIMetrix
SIMetrix
Simulator
You can use the free SIMetrix Circuit Simulator to run My Simulations. Or you can use my observations, tips and techniques - to help you create a suitable file for a different simulator programme. If you do decide to create your own simulation - it may still be worthwhile to download SIMetrix and run my simulations for comparison.

Circuit No.5

This circuit uses a small piezo buzzer. But you can also connect the coil of a small relay to the buzzer terminals. I've used a 270 ohm resistor (RB) to simulate my buzzer and/or relay coil. The differential voltage probe measures the voltage across the resistor. And the state of the buzzer / relay - is determined by the level of that voltage.

Mini-Alarm No.5
Simulator Screenshot

Mini-Alarms 5 & 6


In the graph below - the top line represents Sw1. Five seconds into the simulation - V3 opens Sw1 - and R1 takes the inputs of gate 2 high. This causes the output of gate 1 to go high - the oscillator to start - and the buzzer to sound.

Circuit No.5 - Graphs

Simulation Graph For 
Ron J's Mini-Alarm No.5

Mini-Alarms 5 & 6

At 55 seconds - V3 closes Sw1 again. Then the oscillator stops - and the buzzer is silenced. The bottom red line represents the current that flows through the 270 ohm resistor. It's roughly 18mA.


Circuit No.6

This circuit uses a small piezo buzzer. But you can also connect the coil of a small relay to the buzzer terminals. I've used a 270 ohm resistor (RB) to simulate my buzzer and/or relay coil. The differential voltage probe measures the voltage across the resistor. And the state of the buzzer / relay - is determined by the level of that voltage.

Mini-Alarm No.6
Simulator Screenshot

Mini-Alarms 5 & 6


In the graph below - the top line represents Sw1. Five seconds into the simulation - V3 closed Sw1 - and takes the inputs of gate 1 low. This causes the gate 1 output to go high - the oscillator to start - and the buzzer to sound.

Circuit No.6 - Graphs

Simulation Graph For 
Ron J's Mini Alarm No.6

Mini-Alarms 5 & 6

At 55 seconds - V3 opens Sw1 again. Then the oscillator stops - and the buzzer is silenced. The bottom red line represents the current that flows through the 270 ohm resistor. It's roughly 18mA.


Why Are The Simulations 5-Volts?

The Cmos Models that come with SIMetrix 5.40 are designed for a 5-volt supply. And, to keep matters simple, I've set up a 5-volt simulation. However - the alarm itself is designed to work over a range of supply voltages. So included in the Download Material - you'll also find 9v and 12v simulations. To run these additional simulations successfully - you'll need to install my 9v & 12v Cmos models. This is very easy. Simply drag and drop the "MyMods.lb" file into the small "SIMetrix Command Shell" window. And - when asked - confirm that you want to install the new models. Don't Worry! You're not overwriting anything. All the existing models are still there.
Download Simulation Files

Cmos 4001 Tutorial Ron's Circuits Write To Ron More Free Circuits Cmos 4011 Tutorial


Free Web Hosting