Rocket Altimeter (CB25357E)

Today we have more compact solutions. This is from a Radio Electronics magazine from October 1990. It uses the technology of the time.

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Acid Rain Monitor (CB25037E)
Written in an article in Radio Electronics magazine in April 1987, this circuit triggers an alarm...
IR Remote Control Receiver (CB25785E)
This is the receiver circuit for the previous transmitter. The circuit has a programming key to...
Temperature Sensor TMP390 (CB20399E)
This is an example of a temperature sensor shield using the Texas Instruments TMP390 obtained from...