Sound triggered flash (CB8703E)

Found in 90s Popular Electronics, this circuit fires an old camera flash of the type with a xenon lamp from the sound captured by a microphone.

| Clique na imagem para ampliar |

Sequential Indicator (CB20342E)
This circuit was found in documentation from the 80s. The circuit did not include resistors from...
Operational AC DC Converter (CB15807E)
This circuit used in instrumentation is suggested by National Semiconductor, now Texas Instruments and...
1.2 to 25 V x 3 A Variable Power Supply (CB1578E )
The source shown in the figure provides output voltages in the range of 1.2 to 25 V with currents up...