Beja Expert Licensed User Longtime User Aug 10, 2024 #1 Hi All, In Erel's example here , is it posible to replace the clock connection to external clock (555, debounced switch, sensor...etc) instead of the Ardiono digital pin, or it's more tricky? Thank you in advance
Hi All, In Erel's example here , is it posible to replace the clock connection to external clock (555, debounced switch, sensor...etc) instead of the Ardiono digital pin, or it's more tricky? Thank you in advance
E emexes Expert Licensed User Longtime User Aug 10, 2024 #2 As in: you'd like to count incoming pulses from a debounced switch or sensor? (not sure why you'd be counting from a 555, rather than just using the cpu clock oscillator via timer but scaled appropriately) Upvote 0
As in: you'd like to count incoming pulses from a debounced switch or sensor? (not sure why you'd be counting from a 555, rather than just using the cpu clock oscillator via timer but scaled appropriately)
Beja Expert Licensed User Longtime User Aug 10, 2024 #3 emexes said: As in: you'd like to count incoming pulses from a debounced switch or sensor? (not sure why you'd be counting from a 555, rather than just using the cpu clock oscillator via timer but scaled appropriately) Click to expand... Thanks but I don't want to just count, but to count small spare parts automatically. they come at random.. no fixed frequency.. even the 555 frequency is variable. problem is the 1637 requires a minimum frequency of 1KHz whis, first, too high, second, it's fixed. I hope there's a way around this Upvote 0
emexes said: As in: you'd like to count incoming pulses from a debounced switch or sensor? (not sure why you'd be counting from a 555, rather than just using the cpu clock oscillator via timer but scaled appropriately) Click to expand... Thanks but I don't want to just count, but to count small spare parts automatically. they come at random.. no fixed frequency.. even the 555 frequency is variable. problem is the 1637 requires a minimum frequency of 1KHz whis, first, too high, second, it's fixed. I hope there's a way around this
E emexes Expert Licensed User Longtime User Aug 10, 2024 #4 Beja said: problem is the 1637 requires a minimum frequency of 1 kHz Click to expand... Where did you get this information from? Beja said: which is, first, too high Click to expand... I would agree with that if that information was correct, but the random TM1637 datasheet I looked at did not specify a minimum data clock frequency (or a maximum data clock period). Beja said: second, it's fixed Click to expand... What problem does that cause? I feel like I am misunderstanding your question. Are we talking about the clock (pin 19 of TM1637) that is used to shift the data (pin 17 of TM6637) from the microcontroller to the TM1637 LED display driver chip? Or are we talking about counting the slow pulses that represent the small spare parts that are being counted? Upvote 0
Beja said: problem is the 1637 requires a minimum frequency of 1 kHz Click to expand... Where did you get this information from? Beja said: which is, first, too high Click to expand... I would agree with that if that information was correct, but the random TM1637 datasheet I looked at did not specify a minimum data clock frequency (or a maximum data clock period). Beja said: second, it's fixed Click to expand... What problem does that cause? I feel like I am misunderstanding your question. Are we talking about the clock (pin 19 of TM1637) that is used to shift the data (pin 17 of TM6637) from the microcontroller to the TM1637 LED display driver chip? Or are we talking about counting the slow pulses that represent the small spare parts that are being counted?
Beja Expert Licensed User Longtime User Aug 12, 2024 #5 Thanks and this issue is solved here Upvote 0
E emexes Expert Licensed User Longtime User Aug 12, 2024 #6 Beja said: second, it's fixed Click to expand... Beja said: this issue is solved Click to expand... Lol sorry, I interpreted "fixed" as meaning "not changing". My mistake. ? Upvote 0
Beja said: second, it's fixed Click to expand... Beja said: this issue is solved Click to expand... Lol sorry, I interpreted "fixed" as meaning "not changing". My mistake. ?
Beja Expert Licensed User Longtime User Aug 12, 2024 #7 I thought a schmitt trigger will square up the hysteresis instead of removing them. Debouncing can be acheived by either a small value ceramic disc capacitor or by software, I used 60 ms delay after trial and error. Upvote 0
I thought a schmitt trigger will square up the hysteresis instead of removing them. Debouncing can be acheived by either a small value ceramic disc capacitor or by software, I used 60 ms delay after trial and error.
