Delay circuit

130

03:13:58

When the switch is tapped the current going to the led we be delayed

published 9 years ago

ArpitDhole

9 years ago

Like tubelight

psteichen

9 years ago

Doesn't delay for me. Without a resistor to slow the charge entering the capacitor, the delay is only a few milliseconds.

psteichen

9 years ago

Just measured it. Around 250 nanoseconds, which is the same turn on time observed with no capacitor at all. Try placing a resistor immediately after the switch to slow the charge entering the capacitor.

cue108

9 years ago

Well, the problem in simple delay circuits is the long switch off period. This drives the load driver transistor into 'forbidden characteristic area'. Check out the ampere decay in your 200 Ohm resistor. Look at this circuit with discrete parts having a steep switch off phase on the driver transistor. http://everycircuit.com/circuit/5355705678168064/switch-delay

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