I immanuel New Member Mar 1, 2009 #1 did anyone knows what transistor is similar to BC108 and what other ic should i use to replace ht2811 sound chip? tnx 4 any help!
did anyone knows what transistor is similar to BC108 and what other ic should i use to replace ht2811 sound chip? tnx 4 any help!
C colin55 Well-Known Member Mar 1, 2009 #2 BC 547 Is it a ding dong doorbell chip? Last edited: Mar 1, 2009
I immanuel New Member Mar 1, 2009 #3 yeah it is a ding dong bell chip.. what you think? Last edited: Mar 1, 2009
C colin55 Well-Known Member Mar 1, 2009 #4 You can buy the ht2811 chip from lots of suppliers for $1.00
I immanuel New Member Mar 1, 2009 #5 ei colin, how can i connect another cmos 4026 and 7segment display to make my display up to 99 in the circuit in this site: **broken link removed** tnx, ur making my project a lil easy job. tnx a lot!! Last edited: Mar 1, 2009
ei colin, how can i connect another cmos 4026 and 7segment display to make my display up to 99 in the circuit in this site: **broken link removed** tnx, ur making my project a lil easy job. tnx a lot!!
C colin55 Well-Known Member Mar 1, 2009 #6 The 4026's can be cascaded. Out pin 5 goes to pin 1 (clock) of the next chip. The 4026's have current limiting on the outputs so you don't need a resistor. Last edited: Mar 1, 2009
The 4026's can be cascaded. Out pin 5 goes to pin 1 (clock) of the next chip. The 4026's have current limiting on the outputs so you don't need a resistor.
I immanuel New Member Mar 1, 2009 #7 what do you actually mean of being cascaded? should i use same components to connect with the pins of the second 4026 or should i leave it hanging? tnx a lot!!
what do you actually mean of being cascaded? should i use same components to connect with the pins of the second 4026 or should i leave it hanging? tnx a lot!!
C colin55 Well-Known Member Mar 1, 2009 #8 Yes. connect the second 4026 exactly like the first 4026. Now, connect the output (pin 5) of the first chip to pin 1 of the second chip.
Yes. connect the second 4026 exactly like the first 4026. Now, connect the output (pin 5) of the first chip to pin 1 of the second chip.