Heating Element Temperature Rise Rate Control With IC555 Timer as an Astable Multivibrator

There are many different products that use a heating element. Unfortunately, many of them are not adjustable. For our project, we need to control the output temperature range of the heater actuator. The problem is that we can not directly get control on the heating element, for the purpose of regulating the temperature rise rate in the heating element. Heating elements works by converting electrical output power into heat based on resistance, but we can not simply decrease the power output with resistors. There are already many alternative solutions for the required control of the heating element temperature rise rate, but another problem is that most of the alternative solutions rely on sensors to measure or detect parameters and use them to generate controls or pre-programmed programmable microcontrollers, like arduino, less accurate, less stable, and costly. Therefore, practitioner designs an alternative open-loop solution that does not rely on sensors and pre-programmed microcontroller, that is inexpensive, more accurate, and more stable solution by using IC (integrated circuit) 555 to work as a periodic timer to manipulate the voltage switching to the heating element. It was found that temperature rise rate regulation in this way can be done through an appropriate adjustment to the potentiometer, capacitors, and resistors of the circuit to vary the timer cycle of the IC 555, thereby setting the ON and OFF of the relay to the heating element, resulting in an indirect regulation of the heating element output temperature rise rate.