PFM circuit useing 555 timer

171

04:17:45

Modulate a PFM signal useing only common parts like 555 timers and condensators. Control the off-time with the potentiometer.

published 8 years ago

bahget

8 years ago

hurz

8 years ago

its called PFM (Pulse Frequency Modulation) save some diodes http://everycircuit.com/circuit/5399376387375104

LeButch

8 years ago

Thank you for the correction. Your circuit is better sometimes, but in my circuit the on-time stays the same, eaven if the off-time changes. This might be better in some cases.

hurz

8 years ago

Can you at least try to proof this statement? Doesn't look to me you know how 555 does build up the on/off phases for a periode.

LeButch

8 years ago

In your circuit, the off-time stays the same. With this, you can only reach a 50% signal (correct me if I'm wrong). In my circuit, you can reach like 99% on, because on-time stays the same.

happy_fapper

8 years ago

LeButch is a 66 year old male Paedophile named Ian Weston. If you have children under the age of 16 please keep them supervised whilst using the community of this app especially where this user is involved

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.