hi guys, im trying to make an ignition system for fireworks, but im having a bit of a problem with my circuit.
i am using a key switch, toggle switch and finally a push button to trigger a 4017B decade counter microchip to move to its next output. on these outputs are home made E-Matches, these are no problem at the moment, im more concerned about getting the circuit to work properly first. The problem i hve is when i turn the toggle switch to on the output 0 on the 4017B chip turns high, i dont want it to be high unless the push button is pressed. i also read that if there is no signal going into pin 14 then it should be anchored to negative, i think i can do that with a transistor, but im not sure what one to use. i order all my parts from Leading UK distributor of electronic components, tools, production equipment, electrical spares and educational products., so if anyone can help and find the part i need, i would be very very greatfull.
ive added some drawings and pictures to help you get the idea of what im doing, hope you can help.
Daryl
i am using a key switch, toggle switch and finally a push button to trigger a 4017B decade counter microchip to move to its next output. on these outputs are home made E-Matches, these are no problem at the moment, im more concerned about getting the circuit to work properly first. The problem i hve is when i turn the toggle switch to on the output 0 on the 4017B chip turns high, i dont want it to be high unless the push button is pressed. i also read that if there is no signal going into pin 14 then it should be anchored to negative, i think i can do that with a transistor, but im not sure what one to use. i order all my parts from Leading UK distributor of electronic components, tools, production equipment, electrical spares and educational products., so if anyone can help and find the part i need, i would be very very greatfull.
ive added some drawings and pictures to help you get the idea of what im doing, hope you can help.
Daryl