http://www.mysite.com Comments en Mon, 19 Aug 2019 20:10:15 +0100 Commentics 60 http://www.mysite.com/favicon.ico http://www.mysite.com 16 16 https://homediyelectronics.com/projects/howtobuildanastablemultivibratorcircuitwithoutsolder/?p=5 Mon, 19 Aug 2019 20:10:15 +0100 228 https://homediyelectronics.com/projects/howtobuildanastablemultivibratorcircuitwithoutsolder/?p=5

As it stands the circuit consumes about 15mA and if the battery is alkaline with a capacity of 625mAh then it should last approximately 30 - 40 hours.

You can try increasing the values of the two collector resistors R1 and R4. Common high efficiency LEDs will still glow brightly with only 1mA so try replacing the 470 ohm resistors with 4.7k ohm. This theoretically should allow the battery to last for up to 600 hours.

Steve]]> Thu, 06 Aug 2015 23:34:01 +0100 78 https://homediyelectronics.com/projects/howtobuildanastablemultivibratorcircuitwithoutsolder/?p=5 Thu, 06 Aug 2015 15:56:02 +0100 77 https://homediyelectronics.com/projects/howtobuildanastablemultivibratorcircuitwithoutsolder/?p=5

I'm so pleased that I've interested you in electronics. You are where I was 50 years ago.

The flashing rate is controlled by the two pairs of resistor/capacitor R2/C1 and R3/C2. Increase the values of the two capacitors to slow the flashing rate. Decrease the values to increase the flash rate.

You cannot use this circuit to produce a sine wave but you can make it produce audible signals. Signals become audible at around 5Hz to 16KHz. If you decrease the capacitor values so that the LED's just begin to appear to be on continuously then the circuit is oscillating at the lower end of the audible spectrum.

You can also try adjusting the value of just one of the capacitors. This will make one led turn on for longer than the other.

Hope this helps.

Steve]]> Sun, 23 Nov 2014 23:46:18 +0000 43 https://homediyelectronics.com/projects/howtobuildanastablemultivibratorcircuitwithoutsolder/?p=5 Sun, 23 Nov 2014 20:59:39 +0000 42