No IC's Challenge
Clock ~3.65mA RMS
Display ~6.24mA
Memory Hold ~46.7uA
Only NO SW ~7.66mA RMS
Display Clock and Memory ~9.19mA RMS
All ~9.82mA RMS
19 NPN
3 Super Capacitors
6 diode
3 led 5mA
2 x 100nF-1uF Cap
3 Latch Switch
2 NO Switch
3 x 100
2 x 400
4 x 50k
2 x100k
18 x 200k
1 x 300k
total 30 resistors
SW Map
1(NO) 2
3 4
SW Top Left - Pulse the Clock (if needed)
SW 1(NO) - Displays Clock & Memory, Enables memory change
SW 2 - Save Memory
SW 3 - Show/Enable Clock
SW 4 - Display Memory
features:
1. memory has 1mF backup-power
2. memory has constant power memory hold SW
3. output and clock LEDs fade out
3. Separate Hold SW for Clock Display and Output Display
