Hardware Hacking - Nicolas Collins
Hardware Hacking 77 (the one with the capacitor and feedback resistor), as long as you don’t mix up the two and connect the capa ...
78 Nicolas Collins Experiment with different value capacitors and pots for the different stages. You can substitute photocells o ...
Hardware Hacking 79 Chapter 21: Even More Oscillators You will need: A breadboard. 1 CMOS Hex Schmitt Trigger Integrated Circui ...
80 Nicolas Collins Listen to the output of the oscillator (“master output”) and tune it to a high frequency audio pitch. Now lis ...
Hardware Hacking 81 and squeezing the wire. Sometimes it helps to connect a large resistor (100kOhm 1mOhm) between the clock in ...
82 Nicolas Collins may need to add pull-up resistors to the inputs of the circuits to start them oscillating: connect a resistor ...
Hardware Hacking 83 Chapter 22: On/Off (more fun with photocells) You will need: Two things to turn on & off, such as a rad ...
84 Nicolas Collins cassette/CD, and confirm that audio passes through. Take the whole rat’s nest into a dark place. The sound sh ...
Hardware Hacking 85 Remember to connect all shields/grounds together as we did for our first photocell circuit. If you choose to ...
86 Nicolas Collins Breadboard the circuit shown below. This is the simple oscillator from Chapter 18 (you could also use the 409 ...
Hardware Hacking 87 We can use a slight extension of this basic oscillator/LED/photocell design to create a variation on our fla ...
88 Nicolas Collins The basic concept of the blinking LED chopping audio can be extended from simple oscillators to more complica ...
Hardware Hacking 89 when the LED is on -- if so, you’ve got a simple solution to automating some of the toy’s functions; if not, ...
90 Nicolas Collins you may find this interesting rather than irritating, so try it. Stephen Vitiello has made beautiful recordin ...
Hardware Hacking 91 Chapter 23: Amplification & Distortion You will need: Something to amplify: a guitar, a cassette or CD ...
92 Nicolas Collins The CMOS Inverter amplification stage. As with our oscillator circuits, the six sections of the 4049 chip ar ...
Hardware Hacking 93 cut a lot of highs and the sound will be very bassy. In contrast, a large value of CI (0.1uF) has almost no ...
94 Nicolas Collins Chapter 24: Analog to Digital Conversion, Sort of You will need: Something to amplify: a guitar, a cassette ...
Hardware Hacking 95 Substitute the output of the distortion circuit for the clock/oscillator in the divider circuit we used in C ...
96 Nicolas Collins Put a Schmitt Trigger Inverter stage (from a 74C14 or 4093) between the distortion output and the digital c ...
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