Re: Turntable Stroboscope
O.k. all wired up and double/triple checked my connections.
Something not quite right as I'm getting 8.5 - 8.6kHz on the Output from Pin 4 (2Y) of the CD4081 (actually a CD4081BE but I'm assuming the Pins are the same?)
Inputs on the CD4081 are as follows: -
Pin 1 (1A) from Pin 3 (Q13) of the 74HC4060 - 300Hz
Pin 2 (1B) from Pin 2 (Q12) of the 74HC4060 - 600Hz
Pin 6 (2B) from Pin 1 (Q11) of the 74HC4060 - 1,200Hz
Pin 3 (1Y) is connected to Pin 5 (2A) on the CD4081.
Pins 7 (Vss), 8 (3A), 9 (3B), 12 (4A) and 13 (4B) all go to -ve GRND.
Pin 14 (Vdd) goes to +ve 4.5V - only thing I haven't done is to connect a 100pF ceramic capacitor from this power supply Pin to ground?
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Last edited by DonaldStott; 27th Apr 2019 at 5:48 pm.
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