The Urban Cricket 2 is a solar powered sound generator built on low-end, analog electronics and produces sounds like a cricket. I developed Urban Crickets to practice Sound Tossing with it. Sound Tossing is an alternative type of street art that uses sound as a medium of creative expression in a public space. As the streets belong to the people, the intention is to appeal to anyone who wants to shape their acoustic space.
As tiny sound generator we use an Integrated Circuit (IC) called “Hex Schmitt Trigger Type 74HC14” which was never intended for making sound. It consists of six identical inverters and with two of them we will build one simple oscillator by using 1 resistor, 1 capacitor, 1 diode (optional), 1 solar cell and 1 piezo speaker.
It is a very cheap, loud and simple project that can be made in about 30 minutes.
Step 1: Tools and Parts
A 1 x CMOS IC SN 74 HC 14 N DIP
B 1 x Capacitor 10 uF
C 1 x Resistor 1k or 10k Ohm
D 1 x Diode BAT 43 (optional)
E 1 x Solar Cell 4,5 V / 35mA (or use an old garden light panel)
F 1x Piezo Speaker (PIEZO-SUMMER KPI-G2313L-6260) or similar
G 1 x Wires
H 2 x old mini Speaker Cases, for Piezo Speaker and Circuit