Battery operated heater
Description.
Here is a simple heater circuit that can be operated from a 12V battery. The first part of the circuit is an astable multivibrator build around the two transistors Q1 and Q2 .The ON time of transistor Q2 is set to 0.5 S. The ON time of transistor Q1 can be varied by using the POT R2.The output pulses at the collector of Q2 is used to drive the Darlington power transistor Q3(TIP122).The transistor Q3 drives the heating elements L1 to L3.The net heat produced can be varied by selecting the desired combination of heating elements at the output circuit sing switches S1 and S2.The net heat can be also varied by varying the duty cycle of the triggering pulse using POT R2.
Circuit diagram with Parts list.
Notes.
- The circuit can be assembled on a general purpose PCB.
- The transistor Q3 must be fitted with a heat sink.
- The elements L1 to L3 can be 10W heating coils.
- The switches S1 and S2 must be able to withstand at least 5A.
- The circuit can be powered from a 12V battery.
- The LED D1 gives a visual indication of the duty cycle of the circuit.
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Hi is this water heater which is discussed here
Can i use 12 V adapter to power the Circuit. If i am using 12v adapter in circuit then whats the power consumed for 1 hour/day.
Hi Kulwinder the battery should be connected between +12 and common ground.
Hi Wash each heater has got a capacity of 10watts. a total of 30watts energy is available.
Hey I’m building a project which involves a DC heater. I would like to find out how hot this call actually get. Thanks
huy guys i have read all the circuit but i am unable to understand that where battery ‘s output nodes
thnk for your info… but i want a small battery like 12v..
Hi ABDS with a car battery of 40AH it will work for 12 to 24 hrs depends on the heating required.
how long this battery can survive?
Dear writer
Just wonder who many degrees C can it provide as a maximum
thanks
hiii how r u???
thanks very nice circuit
I really appreciate your effor. \pls kindly send me details on how to design and build 1000watts inverter/ ups
Is this heater is used for heating water?If so what will be the output temperature ?can we use this for space heating?What is the battery back up?
I tested the circuit using a 12V,7Ah battery from my motor cycle.
Thanks very nice project but u didnt mention the current ratings of the battery to be used like 12v@10amp,12v@12ampsetc.moreover the output temperature is not mentioned
Thanks for the message , but i also need the circuit diagram of 50 watt amplifier with double input and output and all neccesary information about it. thanks and GOD bless you