ObviousOllie
- Feb 15, 2017
- 5
- Joined
- Feb 15, 2017
- Messages
- 5
What is wrong?
You need diodes across the relay coils to protect T2, T3 and T4 from induced voltages.
Have you got it wired correctly I do not see R7, R8 and R9. Not that it matters. There seems to be many connections from T2,T3 and T4 to +5V. Are you putting too much current through the transistors?
The LEDs need around 5v to function but will still light at less. I don't know what it wrong with it but obviously when I clap, nothing happensYou have not said what is wrong.
If nothing works, then split the circuit between the chips and check the stages individually.
Do you have enough voltage? 5V into the 4017 will give less than this out, check the data. There will be 0.6V lost in the transistor, you have not said what voltage the leds need.
I removed r7 r8 and r9 along with the relays because I'm not using mains access and the resistora don't do anything vital.
I don't know vf of the leds, the box just describes "white LED"1. There is no decoupling of anything anywhere. Add a 100 uF electrolytic and 0.1 uF ceramic in parallel across the two power rails where the red and black wires enter. Add a 0.1 uF ceramic cap across IC1 pins 1 and 8 and IC2 pins 8 and 16.
2. Disconnect IC1 pin 3 from IC2. Add an LED and 220 ohm resistor in series from IC1 pin 3 to GND. Clap. Observe. Report. If the LED does not flash, the problem is in the 555 circuit. Debug.
3. If the 555 circuit is working, reconnect it to IC2, remove T2, T3, And T4, and connect the cathodes of the three LEDs to GND. This should show if the counter is advancing.
Given that the circuit does not work and you can't figure it out, I don't think you are in a position to proclaim what is and is not vital. They prevent IC2 from burning up due to overcurrent stress of the output transistors. What is the forward conduction voltage (Vf) of the LEDs?
ak
The LEDs need around 5v to function but will still light at less. I don't know what it wrong with it but obviously when I clap, nothing happens