555

I have been working to design a circuit that uses a 555 timer as a pulse width source. The circuit I have made works well but if the button gets held down the 555 just continuously fires. And then eventually starts to oscillate weirdly. I would like the 555 timer to fire only once regardless...

I am attempting to use a thermistor to control the PWM of a 555 output. Ideally, I want the duty cycle to be 100% when hot (~90°C) and 0% when not hot (~25°C). I am doing so by placing the thermistor as R2 (RB) in astable mode with a forward biased diode in parallel to R2 (allowing a duty cycle...

As the title describe. What do you think is the simplest way to generate 2ch clock 180 degree phase shift with 40% duty cycle and 500kHz frequency without any mcu/serial config input? Using two 555 cmos timers seems not like to optimal solution.

Hi, I want to build an IR transmitter (~ 38kHz). My plan is to use a NE555 timer to generate the carrier wave (A-stable Operation), modulate it with a micro controller, and transmit modulated signal via IR LED. My question: Can I connect the micro controller output pin directly to the CONT...

Hello. A novice searching for guidance here. I'm trying to assemble a simple schematic that'll give me 1-2 Mhz (actually 1.65) square signal. After fruitless attempt at classical multivibrator with 2 transistors, I moved on to ICs. First tried NE555, but after some research I figured that it...

Okay, so recently got into breadboards and learning about electrical engineering and computers. And by recently I mean 3 days ago. I have an ne555p chip. I am trying to make an astable clock signa for my projects. lI have no way of showing a diagram. R1-2k R2-100k c1 10uf c2 10uf(across +...

thank you for your help and and point in the right direction is appreciated.

I want to switch on a 12V 1A(peak 1.4A) solenoid valve for 0.1-3 seconds(set using a trimpot) and then switch it off. I'm using 555(operating at 5V, triggered by a IR sensor which operates on 5V only) in monostable mode to generate a 0.1-3s pulse, which is fed directly to gate of mosfet(IRF540-...

Hi, I was looking since some days for a schematic to build a sawtooth and triangular wave generator, then I found this schematic on an online simulator: https://www.falstad.com/circuit/e-555saw.html (I report the original link, obviously, to give credits to the person which has made this...