1. DIGI-210 Review 2 Counters, Coders, Monos ©Paul Godin
Created September 2007
Last edit Sept 2009

2. Determine the truncating state and the modulus of the following active-high up counters (1):

3. Determine the truncating state and the modulus of the following active-high up counters (2):

4. Determine the Count Direction (1)

5. Determine the Count Direction (2)

6. Determine the output states of the following devices1 1 1 1 1

7. Configure the following counter as a symmetrical divide-by-10 (indicate the connections)
Image from Texas Instruments

8. Configure the following counter as a divide-by-6 (indicate the connections)
Image from Texas Instruments

9. Configure the following Monostable to provide a 6 second pulse on a negative edge trigger.Q
R/C C R
k= 0.23, C = 33uF

10. Determine the outputs for the 8-to-3 priority encoders with active-low input and active high output, with input enable A B C 1 2 3 4 5 6 7 En A B C 1 2 3 4 5 6 7 En

11. LED Circuit Calculate the value for R, given: Vout = 0 Volts
VF = 1.5 Volts
IMAX = 15 mA
Calculate I, given:
VOUT = 0.4 Volts
VF = 1.8 Volts
R = 330 Ω
Vcc

12. Describe the output of the following circuit.
Counter A B C
Reset
Monostable
Non-retrig.
0.1 s
6Hz 3 2 1
Timing Diagram