Hardware design and development--hot water circulating pump system

Tag: Greater than timer power application delay diode function transistor resistor

The voltage divider function of the resistor, the clamp function of the diode, the charging and discharging characteristics of the capacitor, the delay circuit consisting of resistors, capacitors and regulators, n-pole and P transistor switching applications in the power supply circuit, the application of composite pipe

I. Introduction of the project background

The project is used in the Minilab machine, requires two tank cylinder circulating hot water, 5 minutes apart, at the same time to the Minilab machine heating system to have thermal function, when the heating system temperature is too high cooling system function and red LED lights as a warning, when the temperature falls to the normal range, The cooling system does not work and the green LED light indicates that the Minilab machine is working properly.

II. Evaluation of Project resources

Required Conditions:

1. Brushed DC motor voltage 12V load Power 0.6W

2. The power supply system is provided by the machine: 15VDC

3. Temperature switch (the first time in less than 70 degrees on the conduction, greater than 70 degrees off, when the temperature again down to 45 degrees again conduction, greater than 70 degrees again off)

4. Timer switch

Hardware design and development--hot water circulating pump system