[FEATURE] 555 / Square Wave Generator

[kabel42]

Add a 555 example square wave generator with adjustable duty cycle and fixed frequency like this:
https://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCCsB0AM8MUgLAUwLQA4QHY5lkmTACYBmZANksx00pEoE5xYo3IMwwAoMSyCBIlk4ZKJI4SY0bOhMFTIpBWZYZIkx4B3cE2ki2wicjawdeg6ctCpIc7rD7bBkS-s8AxjbKZRT6WQyQKFoTnQCUPEcalhuDSY-ZEFYODiPAHMbIOkAkHFsMx4AExANaXKy2FFK6WLUADMAQwBXABsAFwta2GxKyvMAJSFMbG4DUZA1exnrFJnUyB4AeTLIA178-iFNoqzgtjJqspJD04WLEknxtdzSD11Km6eYjzAcGuPiBkkKmnBWIh7GEQINUABnACW4I6TQAdp5UCUqrJtpVvkIQPVmu0uo91lsGP0CQ53L5-M5yQ8fH4bL8PAB7fKYtimBSsYEIMhMWCUEjzEJkHhMljSQ40D4c1KIJgxSB8wQQXhAA

[esaruoho]

The 555 timer already exists in CircuitJS1 as TimerElm (under Active Components → Add 555 Timer). There are also 9 example circuits available under Circuits → 555 Timer Chip, including a square wave generator (555square.txt) and a low-duty-cycle oscillator (555lowduty.txt) with adjustable duty cycle. Could this issue be closed?

[kabel42]

I can't find a "with adjustable duty cycle", which one are you refering to?

[esaruoho]

PR #261 adds the adjustable duty cycle 555 timer circuit from the issue as an example under Circuits > 555 Timer Chip > Adjustable Duty Cycle.