.. between Celsius and Fahrentheit scales. Figure 1. Switch U1a and current mirror Q2Q3 apply an excitation current ratio of 10.23:1 to the 9-sensor transistor string. The string is tapped at 5 × 200 µV/ C = 1 mV/ C and 9 × 111 ...
Simple analog circuits manage multi-PSU powerup and shutdown sequences In projects containing digital and/or analog circuits, multiple power supplies are used, generally 5 V DC for digital circuits and 15 V DC for analog circuits. Some projects ...
.. DC power to an external device. The circuit is powered by a 9 V battery and drives a single coil 5 V latching relay with a 10 A contact rating. The relay can switch AC or DC power. In standby mode the circuit draws a low 1 µA. A firm ...
.. record up to three IR codes in the EEPROM memory and switch 3 separate devices. Each relay can handle the currents up to 10 A. The load switching mechanism (momentary ON/OFF, toggling etc) can be programmed by the user. I used Altium ...
.. Figure 1’s circuit does, in fact. Figure 1. Switch U1a and current mirror Q2Q3 apply an excitation current ratio of 10.23:1 to the 5 sensor transistor series array. This creates a 5 × 200 µV/ C = 1 mV/ C AC signal ...
.. amplifier. When CMUTE is HIGH, the outputs are muted. Output filter Each half-bridge output gets an LC low-pass filter, a 10 µH inductor followed by filtering capacitors. This reconstructs the audio waveform from the PWM switching ...
.. AAs will support 2000 hours (nearly three months) of continuous operation. A single CR2032 lithium coin will hold up for 10 non-stop days. Thanks, Nick and Jim! References Woodward, Stephen. BJT is accurate sensor for absolute temperature in ...
Simple math implemented in a (very) simple circuit. What’s not to like? A very cool (also warm!) property of the base-emitter junction of (most) small signal BJTs is the ΔV BE temperature-sensing effect. ΔV BE temperature ...
.. power supplies, it is not safe to have such high currents flow in a circuit which would normally withstand currents 10÷20 times the work that. You can then see that the batteries in parallel issue are not trivial. The first thing ...