This low-power, low-supply voltage amplifier uses a preamplifier to achieve a high-gain configuration. The circuit is from the November 1999 issue of Electronics Now magazine.
Circuits similar to this appear elsewhere in this section. The transistors can be BC549 (low...
This circuit indicates when a rain is acidic by monitoring its pH. The circuit is from a 90s RE...
In a microprocessor project (shield) for control applications, a triggered clock can be useful....