Ice Warning on the Track (CB6046E)

We found this circuit in an 80's Radio Electronics. The circuit uses a PTC sensor and an LED indicator. The power comes from the car's own battery.

80 Hz Clock (CB6084E)
Found in a Hands On Electronics of the 80s, this circuit makes use of an integrated circuit of the time...
VCNL4100 Proximity Sensor and Ambient Light (Vishay)
March 2017 - This new component of Vishay has a 16-bit resolution that allows it to be used in a...
280 mW amplifier with 741 (CB986E)
The original version of this circuit was suggested by an old Radio Electronics (1990). The circuit can be...