Questions tagged [heater]
The heater tag has no summary.
134 questions
0 votes
1 answer
47 views
Reliable and safe power relay (1500W, 7A) - advice needed
I need advice for choosing a reliable & super-safe (won't catch fire, contacts won't weld) relay. Use case: temeperature control system, switching 1500W electric heaters (resistive), 230 VAC, 6-7 ...
- 101
4 votes
3 answers
287 views
Changing a contactor controlled heater circuit to a silicon-controlled rectifier controlled heater circuit
The original design (BEFORE) controls a heater bank with the controller switch S5. The system is designed to maintain a tank temperature within a narrow range and turn off above the range and on below ...
0 votes
1 answer
158 views
I have a PWM signal that I want to control a heater (3 ohms) with a 36V source. My MOSFETS keep blowing using TC4427
I initially used a 74HC04 to drive the MOSFET gates. This was initially because I wanted 5V on the gate: by putting the pwm 3v3 through the 74HC04 and then re-inverting the pwm came out st 5V. I chose ...
- 387
0 votes
0 answers
56 views
What is this Nexus system heater pipe female connector?
Here are two photos of a heating element pipe connector connected to its regulator used in products from https://nexusregulator.com/en/ - I would like to find out if the female connector can be ...
- 315
2 votes
1 answer
156 views
Best Dimming Cycle Period for longevity of a heating element
I want to 'dim' some 3kW heating elements to provide variable output i.e. between 0 & 100%. I intend to use zero-crossing solid state relays. let's say, for example, I want to run the heater at 50%...
0 votes
2 answers
157 views
Part 2: Modding popcorn popper for coffee roasting
This is a continuation of a previous modification to a popcorn popper for coffee roasting: Modding popcorn popper: shut off heater while keeping fan on The popcorn popper has a main heating coil in ...
- 121
3 votes
4 answers
331 views
Clarifying Filament AC Wiring for 12AU7: Diagram A or B?
I’m trying to wire the 12AU7 filament in AC and I’m torn between connection A or B. I’ve added a 15 Ω resistor to drop the transformer’s voltage so I can get roughly 6.3 V at 300 mA. In DC mode I know ...
- 325
2 votes
2 answers
228 views
Mosfet gets destroyed in induction heater
I am making an induction heater. MOSFETs IRFZ44N, C = 0.1 µF, R1=R2=220 Ω, L1=L2 (don’t know I made it by myself but it’s greater than the induction coil. I made it using 24 AWG wire, 30 turns around ...
- 41
1 vote
1 answer
276 views
Is this the correct way to power the filament of a 12AU7 with 6.3V
I am using a regulated power supply based on an LM317 to provide 6.3V DC for heating the filament of a 12AU7 tube. Currently, I have wired it as follows: Pin 4 and Pin 5 together → +6.3V Pin 9 → GND (...
0 votes
2 answers
177 views
Can a 120VAC resistive heater run with 240VAC by keeping average power the same?
For example, using PWM control. Red: 120VAC, 60Hz Blue: 120VDC Purple: PWM signal from 240VAC rectified to 340VDC All 3 would supply the same average power in one 60Hz period to a resistive load. ...
- 1,134
-1 votes
5 answers
215 views
Which has the faster heating time - PTC thermistors or an etched foil heater?
In evaluating which technology has the faster heating time, given an equal size/thermal mass and an equal voltage, which would be more likely to reach a temperature of 80C faster - a PTC heating ...
- 271
8 votes
3 answers
1k views
Reducing power drawn by a portable car heater
I bought a 300 W dashboard heater which plugs into the 12 V socket on the dashboard. It looks like a mini fan heater with a heating coil and a blower. This must draw about 25 A of current, but most ...
1 vote
2 answers
253 views
Heating Aluminium Block with 40W Cartridges
I want to heat 150x150x12.7mm aluminium block to 275 °C in 60 seconds. Aluminium block is 780grams. I have 40 Watts ceramic cartridges. How many do i need to use to achive 275°C in 60 seconds? I used ...
- 137
0 votes
3 answers
155 views
Polyimide heater doesn't heat up much
I have a new 6.5 cm x 5 cm polyimide heater element that is supposed to have a surface temperature of 41 °C, according to its specs. But it only heats up to ~29 °C (roughly 9 °C above room temperature)...
- 101
0 votes
0 answers
112 views
Control unit for 600W 12V DC camper water heater
I'm trying to build a 12V DC hot water tank for my camper. The aim is to use excess energy supplied by my 350W PV panels to heat water using a 600W heating element that is split into two connectable ...
