Comments on: Tone generator using two 555 timers https://electronicsarea.com/tone-generator-using-two-555-timers/ Electrical and Electronics Tutorials and Circuits Fri, 29 Dec 2023 18:22:51 +0000 hourly 1 https://wordpress.org/?v=4.9.25 By: Marcel https://electronicsarea.com/tone-generator-using-two-555-timers/#comment-31867 Mon, 13 May 2019 23:16:15 +0000 http://electronicsarea.com/?p=3367#comment-31867 Hi Eric

Thanks for notifying me of the error. I have already done the correction to the tutorial.

Thank you

regards

]]> By: Eric Schreiber https://electronicsarea.com/tone-generator-using-two-555-timers/#comment-31848 Mon, 13 May 2019 03:48:31 +0000 http://electronicsarea.com/?p=3367#comment-31848 R7 at 22 Ohms is going to be dropping about five volts. Per Ohms Law, this means the resistor will be dissipating about 1.1 WATTS of power.

If you build this circuit with a typical hobbyist 1/4 watt resistor, it will burn out, as will Q1. Use at least a 2 watt resistor, higher if you have it.

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